{"id":5051,"date":"2026-05-21T02:04:36","date_gmt":"2026-05-21T02:04:36","guid":{"rendered":"https:\/\/weishantech.com\/?p=5051"},"modified":"2026-05-21T02:22:05","modified_gmt":"2026-05-21T02:22:05","slug":"how-breathing-circuits-and-filtration-design-reduce-cross-infection","status":"publish","type":"post","link":"https:\/\/weishantech.com\/pt\/how-breathing-circuits-and-filtration-design-reduce-cross-infection\/","title":{"rendered":"How breathing circuits and filtration design reduce cross-infection"},"content":{"rendered":"\n\n\n\n\nBreathing Circuits & Filtration \u2014 Weishan Tech<\/title>\n<style>\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Montserrat:wght@300;400;500;600;700;800&family=Source+Sans+3:wght@300;400;500;600&display=swap');\n*{margin:0;padding:0;box-sizing:border-box}\nbody{\n width:1080px;margin:0 auto;\n font-family:'Source Sans 3','Source Sans Pro',sans-serif;\n background:#F3F5F7;color:#3A3F45;\n 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cy=\"520\" r=\"2.5\" fill=\"#FF6B6B\" opacity=\"0.2\"\/>\n <circle cx=\"1020\" cy=\"480\" r=\"3\" fill=\"#FF6B6B\" opacity=\"0.15\"\/>\n <!-- Tiny scattered dots -->\n <circle cx=\"300\" cy=\"100\" r=\"1.5\" fill=\"#FF6B6B\" opacity=\"0.15\"\/>\n <circle cx=\"780\" cy=\"90\" r=\"1.8\" fill=\"#FF6B6B\" opacity=\"0.12\"\/>\n <circle cx=\"450\" cy=\"600\" r=\"2\" fill=\"#FF6B6B\" opacity=\"0.1\"\/>\n <circle cx=\"650\" cy=\"550\" r=\"1.5\" fill=\"#FF6B6B\" opacity=\"0.12\"\/>\n <\/svg>\n\n <div class=\"header-content\">\n <div class=\"overtitle hd\">Engineering Perspective \u2014 Medical Device Manufacturer<\/div>\n <h1 class=\"hd\">How Breathing Circuits &<br>Filtration Design Reduce<br><em>Cross-Infection<\/em><\/h1>\n <div class=\"subtitle hd\">Engineering Strategies for Safer Respiratory Care Systems<\/div>\n <div class=\"accent-line\"><\/div>\n <\/div>\n\n <!-- ===== HERO: Full breathing circuit system ===== -->\n <div class=\"hero-wrap\">\n <svg viewbox=\"0 0 920 280\" width=\"860\" 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connection between Y-piece ports -->\n <rect x=\"134\" y=\"104\" width=\"16\" height=\"78\" rx=\"4\" fill=\"url(#tubeGrad)\" stroke=\"#2B7AB8\" stroke-width=\"0.8\"\/>\n\n <!-- Labels along circuit -->\n <text x=\"236\" y=\"76\" text-anchor=\"middle\" font-size=\"9\" fill=\"#18B892\" font-weight=\"500\" opacity=\"0.7\" letter-spacing=\"1\">INSPIRATORY LIMB<\/text>\n <text x=\"236\" y=\"218\" text-anchor=\"middle\" font-size=\"9\" fill=\"#8ABED6\" font-weight=\"500\" opacity=\"0.7\" letter-spacing=\"1\">EXPIRATORY LIMB<\/text>\n\n <!-- Flow direction labels -->\n <text x=\"540\" y=\"78\" text-anchor=\"middle\" font-size=\"8\" fill=\"rgba(168,200,224,0.5)\" font-weight=\"500\">CLEAN AIR \u2192<\/text>\n <text x=\"540\" y=\"218\" text-anchor=\"middle\" font-size=\"8\" fill=\"rgba(168,200,224,0.5)\" font-weight=\"500\">\u2190 EXHALED AIR<\/text>\n\n <!-- Bidirectional protection annotation -->\n <rect x=\"630\" y=\"115\" width=\"200\" height=\"52\" rx=\"8\" fill=\"rgba(24,184,146,0.06)\" stroke=\"rgba(24,184,146,0.2)\" stroke-width=\"1\"\/>\n <text x=\"730\" y=\"138\" text-anchor=\"middle\" font-size=\"11\" fill=\"#18B892\" font-weight=\"600\">Bidirectional Protection<\/text>\n <text x=\"730\" y=\"155\" text-anchor=\"middle\" font-size=\"10\" fill=\"#8ABED6\">Filters on both limbs prevent<\/text>\n <text x=\"730\" y=\"167\" text-anchor=\"middle\" font-size=\"10\" fill=\"#8ABED6\">cross-contamination<\/text>\n <\/svg>\n <\/div>\n\n <!-- Header wave -->\n <svg style=\"position:absolute;bottom:-2px;left:0;width:100%\" viewbox=\"0 0 1080 50\" preserveaspectratio=\"none\">\n <path d=\"M0,30 C200,50 400,10 540,25 C680,40 880,5 1080,20 L1080,50 L0,50Z\" fill=\"#F3F5F7\"\/>\n <\/svg>\n<\/div>\n\n<!-- ============================================================ -->\n<!-- SECTION 1 \u2014 FILTRATION TECHNOLOGY -->\n<!-- ============================================================ -->\n<div class=\"section\">\n <div class=\"section-num\">01<\/div>\n <div class=\"section-title\">High-Efficiency Filtration Against Cross-Contamination<\/div>\n <div class=\"section-accent\"><\/div>\n\n <div class=\"card\">\n <!-- Main illustration -->\n <div style=\"padding:36px 36px 0\">\n <svg viewbox=\"0 0 960 380\" width=\"100%\">\n <defs>\n <lineargradient id=\"fgBg\" x1=\"0\" y1=\"0\" x2=\"1\" y2=\"0\">\n <stop offset=\"0%\" stop-color=\"#FFF5F5\"\/>\n <stop offset=\"35%\" stop-color=\"#FFFFFF\"\/>\n <stop offset=\"65%\" stop-color=\"#FFFFFF\"\/>\n <stop offset=\"100%\" stop-color=\"#F0FBF7\"\/>\n <\/lineargradient>\n <lineargradient id=\"memFill\" x1=\"0\" y1=\"0\" x2=\"1\" y2=\"0\">\n <stop offset=\"0%\" stop-color=\"#B8CCE0\" stop-opacity=\"0.4\"\/>\n <stop offset=\"100%\" stop-color=\"#18B892\" stop-opacity=\"0.3\"\/>\n <\/lineargradient>\n <\/defs>\n\n <!-- Background -->\n <rect x=\"20\" y=\"20\" width=\"920\" height=\"340\" rx=\"12\" fill=\"url(#fgBg)\" stroke=\"#EDF0F4\" stroke-width=\"1\"\/>\n\n <!-- Left zone label -->\n <text x=\"120\" y=\"55\" text-anchor=\"middle\" font-size=\"12\" fill=\"#CC3333\" font-weight=\"600\" letter-spacing=\"2\" font-family=\"Montserrat,sans-serif\">CONTAMINATED AIR<\/text>\n <!-- Right zone label -->\n <text x=\"800\" y=\"55\" text-anchor=\"middle\" font-size=\"12\" fill=\"#0D7C5E\" font-weight=\"600\" letter-spacing=\"2\" font-family=\"Montserrat,sans-serif\">FILTERED CLEAN AIR<\/text>\n\n <!-- ===== Incoming pathogens (left side) ===== -->\n <!-- Virus particles with spikes -->\n <g transform=\"translate(80,130)\">\n <circle r=\"14\" fill=\"#FF6B6B\" opacity=\"0.15\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/>\n <circle r=\"6\" fill=\"#FF6B6B\" opacity=\"0.4\"\/>\n <line x1=\"-14\" y1=\"0\" x2=\"-20\" y2=\"0\" stroke=\"#FF6B6B\" stroke-width=\"1.2\"\/><circle cx=\"-20\" r=\"2.5\" fill=\"#FF6B6B\" opacity=\"0.7\"\/>\n <line x1=\"14\" y1=\"0\" x2=\"20\" y2=\"0\" stroke=\"#FF6B6B\" stroke-width=\"1.2\"\/><circle cx=\"20\" r=\"2.5\" fill=\"#FF6B6B\" opacity=\"0.7\"\/>\n <line x1=\"0\" y1=\"-14\" x2=\"0\" y2=\"-20\" stroke=\"#FF6B6B\" stroke-width=\"1.2\"\/><circle cy=\"-20\" r=\"2.5\" fill=\"#FF6B6B\" opacity=\"0.7\"\/>\n <line x1=\"0\" y1=\"14\" x2=\"0\" y2=\"20\" stroke=\"#FF6B6B\" stroke-width=\"1.2\"\/><circle cy=\"20\" r=\"2.5\" fill=\"#FF6B6B\" opacity=\"0.7\"\/>\n <line x1=\"10\" y1=\"-10\" x2=\"14\" y2=\"-14\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cx=\"14\" cy=\"-14\" r=\"2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <line x1=\"-10\" y1=\"10\" x2=\"-14\" y2=\"14\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cx=\"-14\" cy=\"14\" r=\"2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <line x1=\"10\" y1=\"10\" x2=\"14\" y2=\"14\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cx=\"14\" cy=\"14\" r=\"2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <line x1=\"-10\" y1=\"-10\" x2=\"-14\" y2=\"-14\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cx=\"-14\" cy=\"-14\" r=\"2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <\/g>\n <g transform=\"translate(145,200)\">\n <circle r=\"10\" fill=\"#FF6B6B\" opacity=\"0.12\" stroke=\"#FF6B6B\" stroke-width=\"0.8\"\/>\n <circle r=\"4\" fill=\"#FF6B6B\" opacity=\"0.35\"\/>\n <line x1=\"-10\" y1=\"0\" x2=\"-15\" y2=\"0\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cx=\"-15\" r=\"2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <line x1=\"10\" y1=\"0\" x2=\"15\" y2=\"0\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cx=\"15\" r=\"2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <line x1=\"0\" y1=\"-10\" x2=\"0\" y2=\"-15\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cy=\"-15\" r=\"2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <line x1=\"0\" y1=\"10\" x2=\"0\" y2=\"15\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cy=\"15\" r=\"2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <\/g>\n <g transform=\"translate(110,280)\">\n <circle r=\"12\" fill=\"#FF6B6B\" opacity=\"0.13\" stroke=\"#FF6B6B\" stroke-width=\"0.9\"\/>\n <circle r=\"5\" fill=\"#FF6B6B\" opacity=\"0.38\"\/>\n <line x1=\"-12\" y1=\"0\" x2=\"-17\" y2=\"0\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cx=\"-17\" r=\"2.2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <line x1=\"12\" y1=\"0\" x2=\"17\" y2=\"0\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cx=\"17\" r=\"2.2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <line x1=\"0\" y1=\"-12\" x2=\"0\" y2=\"-17\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cy=\"-17\" r=\"2.2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <line x1=\"0\" y1=\"12\" x2=\"0\" y2=\"17\" stroke=\"#FF6B6B\" stroke-width=\"1\"\/><circle cy=\"17\" r=\"2.2\" fill=\"#FF6B6B\" opacity=\"0.6\"\/>\n <\/g>\n <!-- Bacteria (rod shapes) -->\n <ellipse cx=\"160\" cy=\"130\" rx=\"12\" ry=\"5\" fill=\"#FF6B6B\" opacity=\"0.25\" stroke=\"#FF6B6B\" stroke-width=\"0.8\"\/>\n <ellipse cx=\"75\" cy=\"230\" rx=\"10\" ry=\"4\" fill=\"#FF6B6B\" opacity=\"0.2\" stroke=\"#FF6B6B\" stroke-width=\"0.7\"\/>\n <!-- Water droplets -->\n <path d=\"M175,270 Q178,260 181,270 Q178,276 175,270Z\" fill=\"#6BA3D0\" opacity=\"0.4\" stroke=\"#6BA3D0\" stroke-width=\"0.5\"\/>\n <path d=\"M90,310 Q94,298 98,310 Q94,317 90,310Z\" fill=\"#6BA3D0\" opacity=\"0.35\" stroke=\"#6BA3D0\" stroke-width=\"0.5\"\/>\n\n <!-- Incoming airflow arrows -->\n <g stroke=\"#FF6B6B\" stroke-width=\"1\" opacity=\"0.35\">\n <line x1=\"195\" y1=\"110\" x2=\"280\" y2=\"110\"\/>\n <polygon points=\"280,110 274,106 274,114\" fill=\"#FF6B6B\"\/>\n <line x1=\"200\" y1=\"170\" x2=\"280\" y2=\"170\"\/>\n <polygon points=\"280,170 274,166 274,174\" fill=\"#FF6B6B\"\/>\n <line x1=\"195\" y1=\"230\" x2=\"280\" y2=\"230\"\/>\n <polygon points=\"280,230 274,226 274,234\" fill=\"#FF6B6B\"\/>\n <line x1=\"200\" y1=\"290\" x2=\"280\" y2=\"290\"\/>\n <polygon points=\"280,290 274,286 274,294\" fill=\"#FF6B6B\"\/>\n <\/g>\n\n <!-- ===== FILTER MEMBRANE ASSEMBLY (center) ===== -->\n <!-- Filter housing -->\n <rect x=\"310\" y=\"72\" width=\"280\" height=\"260\" rx=\"14\" fill=\"#F8FAFB\" stroke=\"#0F4C81\" stroke-width=\"1.8\"\/>\n <rect x=\"310\" y=\"72\" width=\"280\" height=\"260\" rx=\"14\" fill=\"url(#memFill)\" opacity=\"0.15\"\/>\n\n <!-- Layer 1: Pre-filter mesh -->\n <rect x=\"340\" y=\"84\" width=\"16\" height=\"236\" rx=\"3\" fill=\"#D0DCE8\" stroke=\"#A0B4C8\" stroke-width=\"0.8\"\/>\n <!-- Mesh pattern -->\n <line x1=\"344\" y1=\"90\" x2=\"344\" y2=\"314\" stroke=\"#8CA8C0\" stroke-width=\"0.4\" stroke-dasharray=\"4 4\"\/>\n <line x1=\"348\" y1=\"90\" x2=\"348\" y2=\"314\" stroke=\"#8CA8C0\" stroke-width=\"0.4\" stroke-dasharray=\"4 4\" stroke-dashoffset=\"2\"\/>\n <line x1=\"352\" y1=\"90\" x2=\"352\" y2=\"314\" stroke=\"#8CA8C0\" stroke-width=\"0.4\" stroke-dasharray=\"4 4\"\/>\n <text x=\"348\" y=\"340\" text-anchor=\"middle\" font-size=\"9.5\" fill=\"#5A7A9A\" font-weight=\"600\">Pre-Filter<\/text>\n\n <!-- Layer 2: BFE electrostatic layer -->\n <rect x=\"380\" y=\"84\" width=\"28\" height=\"236\" rx=\"3\" fill=\"#0F4C81\" opacity=\"0.08\" stroke=\"#0F4C81\" stroke-width=\"1\"\/>\n <!-- Dense dot pattern -->\n <g fill=\"#0F4C81\" opacity=\"0.15\">\n <circle cx=\"388\" cy=\"100\" r=\"1.5\"\/><circle cx=\"396\" cy=\"100\" r=\"1.5\"\/>\n <circle cx=\"392\" cy=\"112\" r=\"1.5\"\/><circle cx=\"400\" cy=\"112\" r=\"1.5\"\/><circle cx=\"384\" cy=\"112\" r=\"1.5\"\/>\n <circle cx=\"388\" cy=\"124\" r=\"1.5\"\/><circle cx=\"396\" cy=\"124\" r=\"1.5\"\/>\n <circle cx=\"392\" cy=\"136\" r=\"1.5\"\/><circle cx=\"400\" cy=\"136\" r=\"1.5\"\/><circle cx=\"384\" cy=\"136\" r=\"1.5\"\/>\n <circle cx=\"388\" cy=\"148\" r=\"1.5\"\/><circle cx=\"396\" cy=\"148\" r=\"1.5\"\/>\n <circle cx=\"392\" cy=\"160\" r=\"1.5\"\/><circle cx=\"400\" cy=\"160\" r=\"1.5\"\/><circle cx=\"384\" cy=\"160\" r=\"1.5\"\/>\n <circle cx=\"388\" cy=\"172\" r=\"1.5\"\/><circle cx=\"396\" cy=\"172\" r=\"1.5\"\/>\n <circle cx=\"392\" cy=\"184\" r=\"1.5\"\/><circle cx=\"400\" cy=\"184\" r=\"1.5\"\/><circle cx=\"384\" cy=\"184\" r=\"1.5\"\/>\n <circle cx=\"388\" cy=\"196\" r=\"1.5\"\/><circle cx=\"396\" cy=\"196\" r=\"1.5\"\/>\n <circle cx=\"392\" cy=\"208\" r=\"1.5\"\/><circle cx=\"400\" cy=\"208\" r=\"1.5\"\/><circle cx=\"384\" cy=\"208\" r=\"1.5\"\/>\n <circle cx=\"388\" cy=\"220\" r=\"1.5\"\/><circle cx=\"396\" cy=\"220\" r=\"1.5\"\/>\n <circle cx=\"392\" cy=\"232\" r=\"1.5\"\/><circle cx=\"400\" cy=\"232\" r=\"1.5\"\/><circle cx=\"384\" cy=\"232\" r=\"1.5\"\/>\n <circle cx=\"388\" cy=\"244\" r=\"1.5\"\/><circle cx=\"396\" cy=\"244\" r=\"1.5\"\/>\n <circle cx=\"392\" cy=\"256\" r=\"1.5\"\/><circle cx=\"400\" cy=\"256\" r=\"1.5\"\/><circle cx=\"384\" cy=\"256\" r=\"1.5\"\/>\n <circle cx=\"388\" cy=\"268\" r=\"1.5\"\/><circle cx=\"396\" cy=\"268\" r=\"1.5\"\/>\n <circle cx=\"392\" cy=\"280\" r=\"1.5\"\/><circle cx=\"400\" cy=\"280\" r=\"1.5\"\/><circle cx=\"384\" cy=\"280\" r=\"1.5\"\/>\n <circle cx=\"388\" cy=\"292\" r=\"1.5\"\/><circle cx=\"396\" cy=\"292\" r=\"1.5\"\/>\n <circle cx=\"392\" cy=\"304\" r=\"1.5\"\/><circle cx=\"400\" cy=\"304\" r=\"1.5\"\/><circle cx=\"384\" cy=\"304\" r=\"1.5\"\/>\n <\/g>\n <text x=\"394\" y=\"340\" text-anchor=\"middle\" font-size=\"10\" fill=\"#0F4C81\" font-weight=\"700\">BFE<\/text>\n\n <!-- Layer 3: VFE melt-blown layer -->\n <rect x=\"430\" y=\"84\" width=\"32\" height=\"236\" rx=\"3\" fill=\"#18B892\" opacity=\"0.08\" stroke=\"#18B892\" stroke-width=\"1\"\/>\n <!-- Fiber pattern -->\n <g stroke=\"#18B892\" stroke-width=\"0.5\" opacity=\"0.25\" fill=\"none\">\n <path d=\"M434,90 Q440,100 446,94 Q452,88 458,98\"\/>\n <path d=\"M434,110 Q442,118 448,108 Q454,98 458,112\"\/>\n <path d=\"M434,130 Q438,140 446,132 Q450,126 458,136\"\/>\n <path d=\"M434,150 Q440,158 446,148 Q454,142 458,155\"\/>\n <path d=\"M434,170 Q442,178 448,168 Q452,160 458,174\"\/>\n <path d=\"M434,190 Q438,200 446,192 Q452,184 458,194\"\/>\n <path d=\"M434,210 Q442,218 448,208 Q454,202 458,215\"\/>\n <path d=\"M434,230 Q438,240 446,232 Q450,224 458,236\"\/>\n <path d=\"M434,250 Q440,260 448,250 Q454,244 458,256\"\/>\n <path d=\"M434,270 Q442,278 446,270 Q452,262 458,274\"\/>\n <path d=\"M434,290 Q438,300 448,292 Q454,284 458,296\"\/>\n <\/g>\n <text x=\"446\" y=\"340\" text-anchor=\"middle\" font-size=\"10\" fill=\"#18B892\" font-weight=\"700\">VFE<\/text>\n\n <!-- Layer 4: Hydrophobic barrier -->\n <rect x=\"486\" y=\"84\" width=\"22\" height=\"236\" rx=\"3\" fill=\"#F5E6C8\" opacity=\"0.5\" stroke=\"#D4A843\" stroke-width=\"0.8\"\/>\n <!-- Water repel pattern -->\n <g fill=\"none\" stroke=\"#D4A843\" stroke-width=\"0.6\" opacity=\"0.35\">\n <path d=\"M490,100 L494,94 L498,100\"\/><path d=\"M500,100 L504,94 L508,100\"\/>\n <path d=\"M490,130 L494,124 L498,130\"\/><path d=\"M500,130 L504,124 L508,130\"\/>\n <path d=\"M490,160 L494,154 L498,160\"\/><path d=\"M500,160 L504,154 L508,160\"\/>\n <path d=\"M490,190 L494,184 L498,190\"\/><path d=\"M500,190 L504,184 L508,190\"\/>\n <path d=\"M490,220 L494,214 L498,220\"\/><path d=\"M500,220 L504,214 L508,220\"\/>\n <path d=\"M490,250 L494,244 L498,250\"\/><path d=\"M500,250 L504,244 L508,250\"\/>\n <path d=\"M490,280 L494,274 L498,280\"\/><path d=\"M500,280 L504,274 L508,280\"\/>\n <\/g>\n <text x=\"497\" y=\"340\" text-anchor=\"middle\" font-size=\"8.5\" fill=\"#B08620\" font-weight=\"600\">Hydrophobic<\/text>\n <text x=\"497\" y=\"351\" text-anchor=\"middle\" font-size=\"8.5\" fill=\"#B08620\" font-weight=\"600\">Barrier<\/text>\n\n <!-- Layer 5: Post-filter support -->\n <rect x=\"532\" y=\"84\" width=\"14\" height=\"236\" rx=\"3\" fill=\"#D0E8DC\" stroke=\"#88C4A0\" stroke-width=\"0.6\"\/>\n <text x=\"539\" y=\"340\" text-anchor=\"middle\" font-size=\"8.5\" fill=\"#5A9A70\" font-weight=\"500\">Support<\/text>\n\n <!-- Blocked indicators at first membrane -->\n <g font-size=\"9\" fill=\"#CC2222\" font-weight=\"700\">\n <text x=\"326\" y=\"128\" text-anchor=\"middle\">\u2715<\/text>\n <text x=\"326\" y=\"178\" text-anchor=\"middle\">\u2715<\/text>\n <text x=\"326\" y=\"228\" text-anchor=\"middle\">\u2715<\/text>\n <text x=\"326\" y=\"278\" text-anchor=\"middle\">\u2715<\/text>\n <\/g>\n\n <!-- Performance badge -->\n <rect x=\"365\" y=\"32\" width=\"180\" height=\"30\" rx=\"15\" fill=\"#18B892\" opacity=\"0.08\" stroke=\"#18B892\" stroke-width=\"1\"\/>\n <text x=\"455\" y=\"52\" text-anchor=\"middle\" font-size=\"13\" fill=\"#18B892\" font-weight=\"700\" font-family=\"Montserrat,sans-serif\">>99.99% BFE \/ VFE<\/text>\n\n <!-- ===== Clean air output (right side) ===== -->\n <g stroke=\"#18B892\" stroke-width=\"1.2\" opacity=\"0.4\">\n <line x1=\"600\" y1=\"110\" x2=\"700\" y2=\"110\"\/>\n <polygon points=\"700,110 694,106 694,114\" fill=\"#18B892\"\/>\n <line x1=\"605\" y1=\"170\" x2=\"720\" y2=\"170\"\/>\n <polygon points=\"720,170 714,166 714,174\" fill=\"#18B892\"\/>\n <line x1=\"600\" y1=\"230\" x2=\"700\" y2=\"230\"\/>\n <polygon points=\"700,230 694,226 694,234\" fill=\"#18B892\"\/>\n <line x1=\"605\" y1=\"290\" x2=\"720\" y2=\"290\"\/>\n <polygon points=\"720,290 714,286 714,294\" fill=\"#18B892\"\/>\n <\/g>\n <!-- Extended flow lines -->\n <g stroke=\"#18B892\" stroke-width=\"0.6\" opacity=\"0.2\">\n <line x1=\"700\" y1=\"110\" x2=\"900\" y2=\"110\"\/>\n <line x1=\"720\" y1=\"170\" x2=\"900\" y2=\"170\"\/>\n <line x1=\"700\" y1=\"230\" x2=\"900\" y2=\"230\"\/>\n <line x1=\"720\" y1=\"290\" x2=\"900\" y2=\"290\"\/>\n <\/g>\n\n <!-- Clean air label on right -->\n <g transform=\"translate(830,190)\">\n <circle r=\"28\" fill=\"#18B892\" opacity=\"0.06\" stroke=\"#18B892\" stroke-width=\"0.8\"\/>\n <polyline points=\"-8,0 -3,6 10,-6\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n <text y=\"48\" text-anchor=\"middle\" font-size=\"10\" fill=\"#0D7C5E\" font-weight=\"600\">CLEAN<\/text>\n <\/g>\n <\/svg>\n <\/div>\n\n <div class=\"card-inner\" style=\"padding-top:16px\">\n <!-- Bullet points -->\n <div class=\"bullet-list\">\n <div class=\"bullet-item\">\n <div class=\"bullet-icon\" style=\"background:#FFF0EE\">\n <svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#FF6B6B\" stroke-width=\"1.5\"><circle cx=\"12\" cy=\"12\" r=\"5\"\/><line x1=\"4\" y1=\"12\" x2=\"1\" y2=\"12\"\/><line x1=\"20\" y1=\"12\" x2=\"23\" y2=\"12\"\/><line x1=\"12\" y1=\"4\" x2=\"12\" y2=\"1\"\/><line x1=\"12\" y1=\"20\" x2=\"12\" y2=\"23\"\/><circle cx=\"1\" cy=\"12\" r=\"1.5\" fill=\"#FF6B6B\"\/><circle cx=\"23\" cy=\"12\" r=\"1.5\" fill=\"#FF6B6B\"\/><circle cx=\"12\" cy=\"1\" r=\"1.5\" fill=\"#FF6B6B\"\/><circle cx=\"12\" cy=\"23\" r=\"1.5\" fill=\"#FF6B6B\"\/><\/svg>\n <\/div>\n <div><strong>BFE\/VFE performance >99.99%<\/strong> helps block airborne pathogens and aerosolized contaminants.<\/div>\n <\/div>\n <div class=\"bullet-item\">\n <div class=\"bullet-icon\" style=\"background:#EAF6FF\">\n <svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#0F4C81\" stroke-width=\"1.5\"><path d=\"M12 2Q12 2 8 12Q5 18 12 18Q19 18 16 12Z\"\/><path d=\"M9 13Q12 16 15 13\" stroke-width=\"1\" opacity=\"0.5\"\/><\/svg>\n <\/div>\n <div><strong>Hydrophobic membrane structures<\/strong> reduce moisture penetration and bacterial migration.<\/div>\n <\/div>\n <div class=\"bullet-item\">\n <div class=\"bullet-icon\" style=\"background:#E8FBF5\">\n <svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"1.5\"><path d=\"M12 2L4 7V13Q4 19 12 22Q20 19 20 13V7Z\"\/><polyline points=\"9 12 11 15 16 9\" stroke-width=\"2\"\/><\/svg>\n <\/div>\n <div><strong>Integrated respiratory filters<\/strong> minimize bidirectional cross-contamination risks between patient and ventilator systems.<\/div>\n <\/div>\n <\/div>\n\n <!-- Icon row -->\n <div class=\"icon-row\">\n <div class=\"icon-col\">\n <div class=\"icon-circle\" style=\"background:#FFF0EE;border:1px solid #FFDDD8\">\n <svg width=\"26\" height=\"26\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#FF6B6B\" stroke-width=\"1.3\"><circle cx=\"12\" cy=\"12\" r=\"5\"\/><line x1=\"4\" y1=\"12\" x2=\"1\" y2=\"12\"\/><line x1=\"20\" y1=\"12\" x2=\"23\" y2=\"12\"\/><line x1=\"12\" y1=\"4\" x2=\"12\" y2=\"1\"\/><line x1=\"12\" y1=\"20\" x2=\"12\" y2=\"23\"\/><circle cx=\"1\" cy=\"12\" r=\"1.5\" fill=\"#FF6B6B\"\/><circle cx=\"23\" cy=\"12\" r=\"1.5\" fill=\"#FF6B6B\"\/><circle cx=\"12\" cy=\"1\" r=\"1.5\" fill=\"#FF6B6B\"\/><circle cx=\"12\" cy=\"23\" r=\"1.5\" fill=\"#FF6B6B\"\/><\/svg>\n <\/div>\n <div class=\"label\">Pathogen<br>Blocked<\/div>\n <\/div>\n <div class=\"icon-col\">\n <div class=\"icon-circle\" style=\"background:#EAF6FF;border:1px solid #C8DEF0\">\n <svg width=\"26\" height=\"26\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#0F4C81\" stroke-width=\"1.3\"><path d=\"M12 2Q12 2 7 13Q4 19 12 19Q20 19 17 13Z\"\/><\/svg>\n <\/div>\n <div class=\"label\">Moisture<br>Repelled<\/div>\n <\/div>\n <div class=\"icon-col\">\n <div class=\"icon-circle\" style=\"background:#E8FBF5;border:1px solid #B8EDD8\">\n <svg width=\"26\" height=\"26\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"1.3\"><path d=\"M12 2L4 7V13Q4 19 12 22Q20 19 20 13V7Z\"\/><polyline points=\"9 12 11 15 16 9\" stroke-width=\"2\"\/><\/svg>\n <\/div>\n <div class=\"label\">Bidirectional<br>Protection<\/div>\n <\/div>\n <div class=\"icon-col\">\n <div class=\"icon-circle\" style=\"background:#F3EEFF;border:1px solid #DDD0F8\">\n <svg width=\"26\" height=\"26\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#7B61C4\" stroke-width=\"1.3\"><rect x=\"4\" y=\"6\" width=\"16\" height=\"12\" rx=\"2\"\/><line x1=\"4\" y1=\"10\" x2=\"20\" y2=\"10\" stroke-width=\"0.8\"\/><line x1=\"4\" y1=\"14\" x2=\"20\" y2=\"14\" stroke-width=\"0.8\"\/><line x1=\"10\" y1=\"6\" x2=\"10\" y2=\"18\" stroke-width=\"0.5\" stroke-dasharray=\"2 2\"\/><line x1=\"14\" y1=\"6\" x2=\"14\" y2=\"18\" stroke-width=\"0.5\" stroke-dasharray=\"2 2\"\/><\/svg>\n <\/div>\n <div class=\"label\">HEPA-Grade<br>Membrane<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n<!-- DIVIDER -->\n<div class=\"divider\"><div class=\"divider-line\"><\/div><div class=\"divider-dot\"><\/div><div class=\"divider-line\"><\/div><\/div>\n\n<!-- ============================================================ -->\n<!-- SECTION 2 \u2014 BREATHING CIRCUIT DESIGN & CONDENSATE CONTROL -->\n<!-- ============================================================ -->\n<div class=\"section\">\n <div class=\"section-num\">02<\/div>\n <div class=\"section-title\">Optimized Circuit Geometry Reduces Moisture Accumulation<\/div>\n <div class=\"section-accent\"><\/div>\n\n <div class=\"card\">\n <div class=\"compare-wrap\">\n <div class=\"vs-pill\">VS<\/div>\n\n <!-- LEFT: Corrugated -->\n <div class=\"compare-side bad\">\n <div class=\"compare-badge red\">\n <svg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#CC3333\" stroke-width=\"2\"><polygon points=\"12 2 2 20 22 20\"\/><line x1=\"12\" y1=\"9\" x2=\"12\" y2=\"14\"\/><circle cx=\"12\" cy=\"17\" r=\"1\" fill=\"#CC3333\"\/><\/svg>\n CORRUGATED TUBING\n <\/div>\n <svg viewbox=\"0 0 400 300\" width=\"100%\">\n <!-- Tube outer walls (corrugated) -->\n <path d=\"M20,60 Q35,48 50,60 Q65,48 80,60 Q95,48 110,60 Q125,48 140,60 Q155,48 170,60 Q185,48 200,60 Q215,48 230,60 Q245,48 260,60 Q275,48 290,60 Q305,48 320,60 Q335,48 350,60 Q365,48 380,60\" fill=\"none\" stroke=\"#9A9A9A\" stroke-width=\"3\"\/>\n <path d=\"M20,210 Q35,222 50,210 Q65,222 80,210 Q95,222 110,210 Q125,222 140,210 Q155,222 170,210 Q185,222 200,210 Q215,222 230,210 Q245,222 260,210 Q275,222 290,210 Q305,222 320,210 Q335,222 350,210 Q365,222 380,210\" fill=\"none\" stroke=\"#9A9A9A\" stroke-width=\"3\"\/>\n <!-- Inner surface texture (ridges) -->\n <g stroke=\"#C0C0C0\" stroke-width=\"0.5\" opacity=\"0.35\">\n <line x1=\"35\" y1=\"65\" x2=\"35\" y2=\"205\"\/>\n <line x1=\"65\" y1=\"65\" x2=\"65\" y2=\"205\"\/>\n <line x1=\"95\" y1=\"65\" x2=\"95\" y2=\"205\"\/>\n <line x1=\"125\" y1=\"65\" x2=\"125\" y2=\"205\"\/>\n <line x1=\"155\" y1=\"65\" x2=\"155\" y2=\"205\"\/>\n <line x1=\"185\" y1=\"65\" x2=\"185\" y2=\"205\"\/>\n <line x1=\"215\" y1=\"65\" x2=\"215\" y2=\"205\"\/>\n <line x1=\"245\" y1=\"65\" x2=\"245\" y2=\"205\"\/>\n <line x1=\"275\" y1=\"65\" x2=\"275\" y2=\"205\"\/>\n <line x1=\"305\" y1=\"65\" x2=\"305\" y2=\"205\"\/>\n <line x1=\"335\" y1=\"65\" x2=\"335\" y2=\"205\"\/>\n <line x1=\"365\" y1=\"65\" x2=\"365\" y2=\"205\"\/>\n <\/g>\n <!-- Fill (tube interior) -->\n <rect x=\"20\" y=\"62\" width=\"360\" height=\"148\" rx=\"0\" fill=\"#F8F0EC\" opacity=\"0.4\"\/>\n <!-- Condensation pools in valleys -->\n <g>\n <ellipse cx=\"50\" cy=\"198\" rx=\"13\" ry=\"8\" fill=\"#6BA3D0\" opacity=\"0.35\"\/>\n <ellipse cx=\"80\" cy=\"200\" rx=\"11\" ry=\"7\" fill=\"#6BA3D0\" opacity=\"0.3\"\/>\n <ellipse cx=\"110\" cy=\"197\" rx=\"14\" ry=\"9\" fill=\"#6BA3D0\" opacity=\"0.4\"\/>\n <ellipse cx=\"140\" cy=\"200\" rx=\"12\" ry=\"8\" fill=\"#6BA3D0\" opacity=\"0.35\"\/>\n <ellipse cx=\"170\" cy=\"198\" rx=\"13\" ry=\"8\" fill=\"#6BA3D0\" opacity=\"0.3\"\/>\n <ellipse cx=\"200\" cy=\"200\" rx=\"11\" ry=\"7\" fill=\"#6BA3D0\" opacity=\"0.38\"\/>\n <ellipse cx=\"230\" cy=\"197\" rx=\"14\" ry=\"9\" fill=\"#6BA3D0\" opacity=\"0.42\"\/>\n <ellipse cx=\"260\" cy=\"200\" rx=\"12\" ry=\"7\" fill=\"#6BA3D0\" opacity=\"0.3\"\/>\n <ellipse cx=\"290\" cy=\"198\" rx=\"13\" ry=\"8\" fill=\"#6BA3D0\" opacity=\"0.35\"\/>\n <ellipse cx=\"320\" cy=\"200\" rx=\"11\" ry=\"7\" fill=\"#6BA3D0\" opacity=\"0.32\"\/>\n <ellipse cx=\"350\" cy=\"197\" rx=\"12\" ry=\"8\" fill=\"#6BA3D0\" opacity=\"0.28\"\/>\n <\/g>\n <!-- Turbulent airflow -->\n <g fill=\"none\" stroke=\"#8C8C8C\" stroke-width=\"1.2\" opacity=\"0.4\">\n <path d=\"M40,100 Q60,80 80,105 Q100,80 120,100 Q140,82 160,103\"\/>\n <path d=\"M100,135 Q120,115 140,138 Q160,118 180,140 Q200,120 220,138\"\/>\n <path d=\"M180,100 Q200,82 220,105 Q240,80 260,100 Q280,82 300,104\"\/>\n <path d=\"M240,150 Q260,130 280,155 Q300,132 320,148 Q340,132 360,152\"\/>\n <\/g>\n <!-- Biofilm patches -->\n <g>\n <rect x=\"90\" y=\"172\" width=\"40\" height=\"6\" rx=\"3\" fill=\"#CC8833\" opacity=\"0.35\"\/>\n <rect x=\"200\" y=\"175\" width=\"55\" height=\"5\" rx=\"2.5\" fill=\"#CC8833\" opacity=\"0.3\"\/>\n <rect x=\"310\" y=\"173\" width=\"35\" height=\"5\" rx=\"2.5\" fill=\"#CC8833\" opacity=\"0.25\"\/>\n <\/g>\n <!-- Warning labels -->\n <g transform=\"translate(60,240)\">\n <polygon points=\"8,0 0,14 16,14\" fill=\"none\" stroke=\"#CC3333\" stroke-width=\"1.5\"\/>\n <text x=\"8\" y=\"11\" text-anchor=\"middle\" font-size=\"10\" fill=\"#CC3333\" font-weight=\"700\">!<\/text>\n <text x=\"24\" y=\"11\" font-size=\"10\" fill=\"#CC3333\" font-weight=\"600\">Biofilm risk<\/text>\n <\/g>\n <g transform=\"translate(200,240)\">\n <path d=\"M8,0 Q8,0 3,8 Q0,14 8,14 Q16,14 13,8Z\" fill=\"#6BA3D0\" opacity=\"0.5\" stroke=\"#4A8AB0\" stroke-width=\"0.8\"\/>\n <text x=\"24\" y=\"11\" font-size=\"10\" fill=\"#4A8AB0\" font-weight=\"600\">Condensation trapped<\/text>\n <\/g>\n <g transform=\"translate(100,268)\">\n <path d=\"M0,6 Q8,-4 16,6\" fill=\"none\" stroke=\"#8C8C8C\" stroke-width=\"1.5\"\/>\n <text x=\"24\" y=\"10\" font-size=\"10\" fill=\"#8C8C8C\" font-weight=\"600\">Turbulent airflow<\/text>\n <\/g>\n <\/svg>\n <\/div>\n\n <!-- RIGHT: Smooth-bore -->\n <div class=\"compare-side good\">\n <div class=\"compare-badge green\">\n <svg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#0D7C5E\" stroke-width=\"2\"><circle cx=\"12\" cy=\"12\" r=\"9\"\/><polyline points=\"8 12 11 15 16 9\"\/><\/svg>\n SMOOTH-BORE TUBING\n <\/div>\n <svg viewbox=\"0 0 400 300\" width=\"100%\">\n <!-- Tube outer walls (smooth) -->\n <line x1=\"20\" y1=\"60\" x2=\"380\" y2=\"60\" stroke=\"#18B892\" stroke-width=\"3\"\/>\n <line x1=\"20\" y1=\"210\" x2=\"380\" y2=\"210\" stroke=\"#18B892\" stroke-width=\"3\"\/>\n <!-- Fill (tube interior) -->\n <rect x=\"20\" y=\"62\" width=\"360\" height=\"148\" rx=\"0\" fill=\"#F0FBF7\" opacity=\"0.5\"\/>\n <!-- Smooth inner surface indicator -->\n <line x1=\"20\" y1=\"66\" x2=\"380\" y2=\"66\" stroke=\"#18B892\" stroke-width=\"0.5\" opacity=\"0.2\"\/>\n <line x1=\"20\" y1=\"204\" x2=\"380\" y2=\"204\" stroke=\"#18B892\" stroke-width=\"0.5\" opacity=\"0.2\"\/>\n\n <!-- Laminar airflow (smooth parallel arrows) -->\n <g stroke=\"#18B892\" stroke-width=\"1.2\" opacity=\"0.5\">\n <line x1=\"40\" y1=\"90\" x2=\"340\" y2=\"90\"\/>\n <polygon points=\"340,90 332,86 332,94\" fill=\"#18B892\" opacity=\"0.5\"\/>\n <\/g>\n <g stroke=\"#18B892\" stroke-width=\"1.5\" opacity=\"0.55\">\n <line x1=\"40\" y1=\"115\" x2=\"350\" y2=\"115\"\/>\n <polygon points=\"350,115 342,111 342,119\" fill=\"#18B892\" opacity=\"0.55\"\/>\n <\/g>\n <g stroke=\"#18B892\" stroke-width=\"2\" opacity=\"0.6\">\n <line x1=\"40\" y1=\"140\" x2=\"360\" y2=\"140\"\/>\n <polygon points=\"360,140 352,135 352,145\" fill=\"#18B892\" opacity=\"0.6\"\/>\n <\/g>\n <g stroke=\"#18B892\" stroke-width=\"1.5\" opacity=\"0.55\">\n <line x1=\"40\" y1=\"165\" x2=\"350\" y2=\"165\"\/>\n <polygon points=\"350,165 342,161 342,169\" fill=\"#18B892\" opacity=\"0.55\"\/>\n <\/g>\n <g stroke=\"#18B892\" stroke-width=\"1.2\" opacity=\"0.5\">\n <line x1=\"40\" y1=\"190\" x2=\"340\" y2=\"190\"\/>\n <polygon points=\"340,190 332,186 332,194\" fill=\"#18B892\" opacity=\"0.5\"\/>\n <\/g>\n\n <!-- Velocity profile (faster in center) -->\n <text x=\"370\" y=\"140\" font-size=\"8\" fill=\"#18B892\" opacity=\"0.5\" font-weight=\"500\">Vmax<\/text>\n\n <!-- Controlled drainage -->\n <g transform=\"translate(200,210)\">\n <line x1=\"0\" y1=\"0\" x2=\"0\" y2=\"20\" stroke=\"#6BA3D0\" stroke-width=\"1.5\" stroke-dasharray=\"3 2\"\/>\n <polygon points=\"0,20 -4,14 4,14\" fill=\"#6BA3D0\" opacity=\"0.5\"\/>\n <text y=\"34\" text-anchor=\"middle\" font-size=\"9\" fill=\"#6BA3D0\" font-weight=\"500\">Controlled drainage<\/text>\n <\/g>\n\n <!-- Check indicators -->\n <g transform=\"translate(60,245)\">\n <circle r=\"7\" fill=\"#18B892\" opacity=\"0.12\"\/>\n <polyline points=\"-3,0 -1,3 4,-3\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n <text x=\"14\" y=\"4\" font-size=\"10\" fill=\"#0D7C5E\" font-weight=\"600\">Low secretion retention<\/text>\n <\/g>\n <g transform=\"translate(60,272)\">\n <circle r=\"7\" fill=\"#18B892\" opacity=\"0.12\"\/>\n <polyline points=\"-3,0 -1,3 4,-3\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n <text x=\"14\" y=\"4\" font-size=\"10\" fill=\"#0D7C5E\" font-weight=\"600\">Reduced microbial growth<\/text>\n <\/g>\n <\/svg>\n <\/div>\n <\/div>\n\n <div class=\"card-inner\" style=\"padding-top:16px\">\n <div class=\"bullet-list\">\n <div class=\"bullet-item\">\n <div class=\"bullet-icon\" style=\"background:#E8FBF5\">\n <svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"1.5\"><rect x=\"2\" y=\"9\" width=\"20\" height=\"6\" rx=\"3\"\/><line x1=\"8\" y1=\"12\" x2=\"18\" y2=\"12\" stroke-width=\"1\" opacity=\"0.5\"\/><polygon points=\"18,12 15,10 15,14\" fill=\"#18B892\" opacity=\"0.5\"\/><\/svg>\n <\/div>\n <div><strong>Smooth-bore tubing<\/strong> improves airflow efficiency while reducing secretion retention.<\/div>\n <\/div>\n <div class=\"bullet-item\">\n <div class=\"bullet-icon\" style=\"background:#EAF6FF\">\n <svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#0F4C81\" stroke-width=\"1.5\"><path d=\"M12 2Q12 2 7 13Q4 19 12 19Q20 19 17 13Z\"\/><line x1=\"8\" y1=\"22\" x2=\"16\" y2=\"22\" stroke-width=\"1.5\"\/><line x1=\"6\" y1=\"22\" x2=\"6\" y2=\"19\" stroke=\"#FF6B6B\" stroke-width=\"2\"\/><line x1=\"18\" y1=\"22\" x2=\"18\" y2=\"19\" stroke=\"#FF6B6B\" stroke-width=\"2\"\/><\/svg>\n <\/div>\n <div><strong>Low-condensation circuit design<\/strong> helps minimize microbial growth in humid environments.<\/div>\n <\/div>\n <div class=\"bullet-item\">\n <div class=\"bullet-icon\" style=\"background:#F0F7FF\">\n <svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#0F4C81\" stroke-width=\"1.5\"><path d=\"M4 16L12 20L20 16\"\/><path d=\"M4 12L12 16L20 12\"\/><path d=\"M4 8L12 12L20 8L12 4Z\"\/><\/svg>\n <\/div>\n <div><strong>Controlled water drainage pathways<\/strong> lower the risk of contaminated condensate backflow.<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n<!-- DIVIDER -->\n<div class=\"divider\"><div class=\"divider-line\"><\/div><div class=\"divider-dot\"><\/div><div class=\"divider-line\"><\/div><\/div>\n\n<!-- ============================================================ -->\n<!-- SECTION 3 \u2014 ISO CONNECTIVITY & SEALED INTERFACES -->\n<!-- ============================================================ -->\n<div class=\"section\">\n <div class=\"section-num\">03<\/div>\n <div class=\"section-title\">Precision Sealing Through ISO 5356 Standard Interfaces<\/div>\n <div class=\"section-accent\"><\/div>\n\n <div class=\"card\">\n <div style=\"padding:36px 36px 0\">\n <svg viewbox=\"0 0 960 400\" width=\"100%\">\n <defs>\n <lineargradient id=\"connGrad\" x1=\"0\" y1=\"0\" x2=\"0\" y2=\"1\">\n <stop offset=\"0%\" stop-color=\"#D8E4F0\"\/>\n <stop offset=\"50%\" stop-color=\"#E8EEF4\"\/>\n <stop offset=\"100%\" stop-color=\"#D8E4F0\"\/>\n <\/lineargradient>\n <lineargradient id=\"sealG\" x1=\"0\" y1=\"0\" x2=\"0\" y2=\"1\">\n <stop offset=\"0%\" stop-color=\"#18B892\" stop-opacity=\"0.1\"\/>\n <stop offset=\"50%\" stop-color=\"#18B892\" stop-opacity=\"0.5\"\/>\n <stop offset=\"100%\" stop-color=\"#18B892\" stop-opacity=\"0.1\"\/>\n <\/lineargradient>\n <\/defs>\n\n <!-- Background -->\n <rect x=\"20\" y=\"20\" width=\"920\" height=\"360\" rx=\"12\" fill=\"#FAFBFD\" stroke=\"#EDF0F4\" stroke-width=\"1\"\/>\n\n <!-- ===== LEFT CONNECTOR (Female 22mm) ===== -->\n <g transform=\"translate(180,200)\">\n <!-- Outer housing -->\n <path d=\"M-160,-70 L40,-70 L40,-58 Q52,-58 52,-46 L52,46 Q52,58 40,58 L40,70 L-160,70 Q-168,70 -168,62 L-168,-62 Q-168,-70 -160,-70Z\" fill=\"url(#connGrad)\" stroke=\"#8CA8C0\" stroke-width=\"1.5\"\/>\n <!-- Inner bore surface -->\n <rect x=\"-145\" y=\"-48\" width=\"168\" height=\"96\" rx=\"6\" fill=\"#F0F4F8\" stroke=\"#A0B4C8\" stroke-width=\"0.8\"\/>\n <!-- Taper (conical inner surface) -->\n <path d=\"M23,-48 L52,-58 L52,58 L23,48Z\" fill=\"#C8D8E8\" stroke=\"#8CA8C0\" stroke-width=\"0.5\"\/>\n <!-- Surface finish lines -->\n <g stroke=\"#B0C4D4\" stroke-width=\"0.3\" opacity=\"0.5\">\n <line x1=\"28\" y1=\"-40\" x2=\"48\" y2=\"-48\"\/>\n <line x1=\"28\" y1=\"-20\" x2=\"48\" y2=\"-28\"\/>\n <line x1=\"28\" y1=\"0\" x2=\"48\" y2=\"-8\"\/>\n <line x1=\"28\" y1=\"20\" x2=\"48\" y2=\"12\"\/>\n <line x1=\"28\" y1=\"40\" x2=\"48\" y2=\"32\"\/>\n <\/g>\n <!-- Label -->\n <text x=\"-55\" y=\"-4\" text-anchor=\"middle\" font-size=\"13\" fill=\"#0F4C81\" font-weight=\"600\" font-family=\"Montserrat,sans-serif\">FEMALE<\/text>\n <text x=\"-55\" y=\"14\" text-anchor=\"middle\" font-size=\"11\" fill=\"#5A7A9A\">22mm Taper<\/text>\n\n <!-- Dimension line -->\n <line x1=\"-145\" y1=\"-82\" x2=\"40\" y2=\"-82\" stroke=\"#3A3F45\" stroke-width=\"0.6\"\/>\n <line x1=\"-145\" y1=\"-88\" x2=\"-145\" y2=\"-76\" stroke=\"#3A3F45\" stroke-width=\"0.6\"\/>\n <line x1=\"40\" y1=\"-88\" x2=\"40\" y2=\"-76\" stroke=\"#3A3F45\" stroke-width=\"0.6\"\/>\n <text x=\"-52\" y=\"-88\" text-anchor=\"middle\" font-size=\"10\" fill=\"#3A3F45\" font-weight=\"500\">22mm<\/text>\n <\/g>\n\n <!-- ===== ASSEMBLY ARROWS ===== -->\n <g transform=\"translate(480,200)\">\n <!-- Dashed assembly lines -->\n <line x1=\"-40\" y1=\"-20\" x2=\"40\" y2=\"-20\" stroke=\"#18B892\" stroke-width=\"1.5\" stroke-dasharray=\"5 3\"\/>\n <polygon points=\"-40,-20 -33,-24 -33,-16\" fill=\"#18B892\"\/>\n <polygon points=\"40,-20 33,-24 33,-16\" fill=\"#18B892\"\/>\n <line x1=\"-40\" y1=\"20\" x2=\"40\" y2=\"20\" stroke=\"#18B892\" stroke-width=\"1.5\" stroke-dasharray=\"5 3\"\/>\n <polygon points=\"-40,20 -33,16 -33,24\" fill=\"#18B892\"\/>\n <polygon points=\"40,20 33,16 33,24\" fill=\"#18B892\"\/>\n\n <!-- Center seal ring -->\n <ellipse rx=\"8\" ry=\"60\" fill=\"url(#sealG)\" stroke=\"#18B892\" stroke-width=\"2\" opacity=\"0.8\"\/>\n <ellipse rx=\"4\" ry=\"50\" fill=\"#18B892\" opacity=\"0.08\"\/>\n\n <!-- Seal label -->\n <line x1=\"8\" y1=\"-55\" x2=\"75\" y2=\"-85\" stroke=\"#18B892\" stroke-width=\"0.8\" stroke-dasharray=\"3 2\"\/>\n <rect x=\"75\" y=\"-98\" width=\"120\" height=\"26\" rx=\"13\" fill=\"#18B892\" opacity=\"0.08\" stroke=\"#18B892\" stroke-width=\"0.8\"\/>\n <text x=\"135\" y=\"-81\" text-anchor=\"middle\" font-size=\"11\" fill=\"#18B892\" font-weight=\"600\">AIRTIGHT SEAL<\/text>\n <\/g>\n\n <!-- ===== RIGHT CONNECTOR (Male 15mm) ===== -->\n <g transform=\"translate(780,200)\">\n <!-- Outer housing -->\n <path d=\"M-52,-58 Q-52,-70 -40,-70 L160,-70 Q168,-70 168,-62 L168,62 Q168,70 160,70 L-40,70 Q-52,70 -52,58 L-52,46 Q-52,58 -40,58 L-40,70\" fill=\"url(#connGrad)\" stroke=\"#8CA8C0\" stroke-width=\"1.5\"\/>\n <path d=\"M-52,-70 L-40,-70 L-40,70 L-52,70 L-52,58 Q-52,46 -40,46 L-40,-46 Q-52,-46 -52,-58Z\" fill=\"url(#connGrad)\" stroke=\"#8CA8C0\" stroke-width=\"1.5\"\/>\n <!-- Male cone (protruding part) -->\n <path d=\"M-52,-46 L-40,-46 L-40,46 L-52,46Z\" fill=\"#C8D8E8\" stroke=\"#8CA8C0\" stroke-width=\"0.5\"\/>\n <!-- Inner section -->\n <rect x=\"-23\" y=\"-42\" width=\"168\" height=\"84\" rx=\"6\" fill=\"#F0F4F8\" stroke=\"#A0B4C8\" stroke-width=\"0.8\"\/>\n <!-- Surface finish -->\n <g stroke=\"#B0C4D4\" stroke-width=\"0.3\" opacity=\"0.5\">\n <line x1=\"-48\" y1=\"-35\" x2=\"-42\" y2=\"-40\"\/>\n <line x1=\"-48\" y1=\"-15\" x2=\"-42\" y2=\"-20\"\/>\n <line x1=\"-48\" y1=\"5\" x2=\"-42\" y2=\"0\"\/>\n <line x1=\"-48\" y1=\"25\" x2=\"-42\" y2=\"20\"\/>\n <line x1=\"-48\" y1=\"40\" x2=\"-42\" y2=\"35\"\/>\n <\/g>\n <!-- Label -->\n <text x=\"60\" y=\"-4\" text-anchor=\"middle\" font-size=\"13\" fill=\"#0F4C81\" font-weight=\"600\" font-family=\"Montserrat,sans-serif\">MALE<\/text>\n <text x=\"60\" y=\"14\" text-anchor=\"middle\" font-size=\"11\" fill=\"#5A7A9A\">15mm Taper<\/text>\n\n <!-- Dimension line -->\n <line x1=\"-52\" y1=\"-82\" x2=\"-23\" y2=\"-82\" stroke=\"#3A3F45\" stroke-width=\"0.6\"\/>\n <line x1=\"-52\" y1=\"-88\" x2=\"-52\" y2=\"-76\" stroke=\"#3A3F45\" stroke-width=\"0.6\"\/>\n <line x1=\"-23\" y1=\"-88\" x2=\"-23\" y2=\"-76\" stroke=\"#3A3F45\" stroke-width=\"0.6\"\/>\n <text x=\"-37\" y=\"-88\" text-anchor=\"middle\" font-size=\"10\" fill=\"#3A3F45\" font-weight=\"500\">15mm<\/text>\n <\/g>\n\n <!-- Internal airflow lines (showing sealed system) -->\n <g stroke=\"#0F4C81\" stroke-width=\"0.6\" opacity=\"0.15\">\n <line x1=\"60\" y1=\"175\" x2=\"900\" y2=\"175\"\/>\n <line x1=\"60\" y1=\"200\" x2=\"900\" y2=\"200\"\/>\n <line x1=\"60\" y1=\"225\" x2=\"900\" y2=\"225\"\/>\n <\/g>\n\n <!-- Blocked external particles -->\n <g transform=\"translate(340,310)\">\n <circle r=\"5\" fill=\"#FF6B6B\" opacity=\"0.4\"\/>\n <line x1=\"-7\" y1=\"-7\" x2=\"7\" y2=\"7\" stroke=\"#FF3333\" stroke-width=\"1.5\"\/>\n <line x1=\"7\" y1=\"-7\" x2=\"-7\" y2=\"7\" stroke=\"#FF3333\" stroke-width=\"1.5\"\/>\n <\/g>\n <g transform=\"translate(620,100)\">\n <circle r=\"4\" fill=\"#FF6B6B\" opacity=\"0.35\"\/>\n <line x1=\"-6\" y1=\"-6\" x2=\"6\" y2=\"6\" stroke=\"#FF3333\" stroke-width=\"1.3\"\/>\n <line x1=\"6\" y1=\"-6\" x2=\"-6\" y2=\"6\" stroke=\"#FF3333\" stroke-width=\"1.3\"\/>\n <\/g>\n <text x=\"480\" y=\"355\" text-anchor=\"middle\" font-size=\"11\" fill=\"#FF6B6B\" opacity=\"0.6\" font-weight=\"500\">No external particle leakage \u2014 sealed interface integrity<\/text>\n <\/svg>\n <\/div>\n\n <div class=\"card-inner\" style=\"padding-top:16px\">\n <div class=\"bullet-list\">\n <div class=\"bullet-item\">\n <div class=\"bullet-icon\" style=\"background:#E8FBF5\">\n <svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"1.5\"><circle cx=\"12\" cy=\"12\" r=\"8\"\/><text x=\"12\" y=\"15\" text-anchor=\"middle\" font-size=\"8\" fill=\"#18B892\" font-weight=\"700\" stroke=\"none\">ISO<\/text><\/svg>\n <\/div>\n <div><strong>ISO 5356 compliant connectors<\/strong> improve compatibility across respiratory devices.<\/div>\n <\/div>\n <div class=\"bullet-item\">\n <div class=\"bullet-icon\" style=\"background:#EAF0F7\">\n <svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#0F4C81\" stroke-width=\"1.5\"><rect x=\"5\" y=\"8\" width=\"14\" height=\"11\" rx=\"2\"\/><path d=\"M8 8V6a4 4 0 018 0v2\"\/><circle cx=\"12\" cy=\"14\" r=\"1.5\" fill=\"#0F4C81\"\/><\/svg>\n <\/div>\n <div><strong>Leak-resistant interfaces<\/strong> help maintain closed-system ventilation integrity.<\/div>\n <\/div>\n <div class=\"bullet-item\">\n <div class=\"bullet-icon\" style=\"background:#F0F7FF\">\n <svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#0F4C81\" stroke-width=\"1.5\"><circle cx=\"12\" cy=\"12\" r=\"9\"\/><polyline points=\"12 8 12 12 16 12\" stroke-width=\"1.5\"\/><\/svg>\n <\/div>\n <div><strong>Secure fitting structures<\/strong> reduce accidental disconnections and environmental exposure risks.<\/div>\n <\/div>\n <\/div>\n\n <!-- Icon row -->\n <div class=\"icon-row\">\n <div class=\"icon-col\">\n <div class=\"icon-circle\" style=\"background:#EAF0F7;border:1px solid #C8DEF0\">\n <svg width=\"26\" height=\"26\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#0F4C81\" stroke-width=\"1.3\"><rect x=\"5\" y=\"8\" width=\"14\" height=\"11\" rx=\"2\"\/><path d=\"M8 8V6a4 4 0 018 0v2\"\/><circle cx=\"12\" cy=\"14\" r=\"1.5\" fill=\"#0F4C81\"\/><\/svg>\n <\/div>\n <div class=\"label\">Leak<br>Prevention<\/div>\n <\/div>\n <div class=\"icon-col\">\n <div class=\"icon-circle\" style=\"background:#E8FBF5;border:1px solid #B8EDD8\">\n <svg width=\"26\" height=\"26\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"1.3\"><circle cx=\"12\" cy=\"12\" r=\"9\"\/><text x=\"12\" y=\"14\" text-anchor=\"middle\" font-size=\"7\" fill=\"#18B892\" font-weight=\"700\" stroke=\"none\">ISO<\/text><\/svg>\n <\/div>\n <div class=\"label\">ISO 5356<br>Certified<\/div>\n <\/div>\n <div class=\"icon-col\">\n <div class=\"icon-circle\" style=\"background:#EAF0F7;border:1px solid #C8DEF0\">\n <svg width=\"26\" height=\"26\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#0F4C81\" stroke-width=\"1.3\"><circle cx=\"12\" cy=\"12\" r=\"9\"\/><polygon points=\"12,8 9,15 15,15\" fill=\"#0F4C81\" opacity=\"0.3\"\/><polyline points=\"9,12 12,15 15,12\" stroke-width=\"1\"\/><\/svg>\n <\/div>\n <div class=\"label\">Closed-Circuit<br>Airflow<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n<!-- ============================================================ -->\n<!-- FOOTER -->\n<!-- ============================================================ -->\n<div class=\"footer\">\n <!-- Summary columns -->\n <div style=\"text-align:center;margin-bottom:12px\">\n <div style=\"font-size:13px;letter-spacing:5px;color:#18B892;font-weight:600;font-family:Montserrat,sans-serif;margin-bottom:28px\">SUMMARY<\/div>\n <\/div>\n\n <div class=\"footer-cols\">\n <div class=\"footer-col\">\n <div class=\"footer-icon\">\n <svg width=\"30\" height=\"30\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"1.3\">\n <rect x=\"6\" y=\"3\" width=\"12\" height=\"18\" rx=\"3\"\/>\n <line x1=\"10\" y1=\"7\" x2=\"10\" y2=\"17\" stroke-width=\"0.8\" stroke-dasharray=\"2 2\"\/>\n <line x1=\"14\" y1=\"7\" x2=\"14\" y2=\"17\" stroke-width=\"0.8\" stroke-dasharray=\"2 2\"\/>\n <\/svg>\n <\/div>\n <div class=\"f-title\">Filtration<\/div>\n <div class=\"f-sub\">>99.99% BFE\/VFE Efficiency<\/div>\n <\/div>\n <div class=\"footer-col\">\n <div class=\"footer-icon\">\n <svg width=\"30\" height=\"30\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"1.3\">\n <rect x=\"2\" y=\"9\" width=\"20\" height=\"6\" rx=\"3\"\/>\n <line x1=\"8\" y1=\"12\" x2=\"18\" y2=\"12\" stroke-width=\"1\"\/><polygon points=\"18,12 15,10 15,14\" fill=\"#18B892\"\/>\n <\/svg>\n <\/div>\n <div class=\"f-title\">Condensate Control<\/div>\n <div class=\"f-sub\">Smooth-Bore Circuit Design<\/div>\n <\/div>\n <div class=\"footer-col\">\n <div class=\"footer-icon\">\n <svg width=\"30\" height=\"30\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#18B892\" stroke-width=\"1.3\">\n <rect x=\"3\" y=\"8\" width=\"8\" height=\"8\" rx=\"2\"\/><rect x=\"13\" y=\"8\" width=\"8\" height=\"8\" rx=\"2\"\/>\n <line x1=\"11\" y1=\"12\" x2=\"13\" y2=\"12\" stroke-width=\"2\" stroke-dasharray=\"1 1\"\/>\n <\/svg>\n <\/div>\n <div class=\"f-title\">Precision Connectivity<\/div>\n <div class=\"f-sub\">ISO 5356 Sealed Interfaces<\/div>\n <\/div>\n <\/div>\n\n <div class=\"footer-line\"><\/div>\n\n <h2 class=\"hd\">Engineered for Safer<br><em>Respiratory Care<\/em><\/h2>\n\n <div class=\"f-body\">\n Advanced respiratory consumables designed for infection prevention and ICU reliability.<br>\n Supporting safer ventilation workflows through filtration efficiency,\n condensate control, and precision connectivity.\n <\/div>\n\n <div class=\"footer-line\"><\/div>\n\n <div class=\"footer-tags\">\n <div class=\"footer-tag\">ISO 5356 Reference<\/div>\n <div class=\"footer-tag\">ICU Respiratory Consumables<\/div>\n <div class=\"footer-tag\">OEM \/ ODM Manufacturing Support<\/div>\n <div class=\"footer-tag\">Infection Prevention Engineering<\/div>\n <\/div>\n\n <div class=\"copyright\">Technical Reference & Manufacturing Insight provided by <strong>Weishan Tech.<\/strong><\/div>\n <div class=\"bottom-bar\"><\/div>\n<\/div>\n\n<\/body>\n<\/html>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Breathing Circuits & Filtration \u2014 Weishan Tech Engineering Perspective \u2014 Medical Device Manufacturer How Breathing Circuits &Filtration Design ReduceCross-Infection Engineering Strategies for Safer Respiratory Care Systems PATIENT FILTER ICU VENTILATOR FILTER INSPIRATORY LIMB EXPIRATORY LIMB CLEAN AIR \u2192 \u2190 EXHALED AIR Bidirectional Protection Filters on both limbs prevent cross-contamination 01 High-Efficiency Filtration Against Cross-Contamination CONTAMINATED […]<\/p>\n","protected":false},"author":1,"featured_media":5053,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[96],"tags":[],"class_list":["post-5051","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How breathing circuits and filtration design reduce cross-infection<\/title>\n<meta name=\"description\" content=\"How breathing circuits and filtration design reduce cross-infection\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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