{"id":13644,"date":"2026-07-15T01:58:00","date_gmt":"2026-07-15T01:58:00","guid":{"rendered":"https:\/\/hlh-js.com\/?p=13644"},"modified":"2026-07-15T02:01:42","modified_gmt":"2026-07-15T02:01:42","slug":"abrasive-blasting-cardiovascular-devices-stents-heart-valves-vad","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/fr\/resource\/blog\/abrasive-blasting-cardiovascular-devices-stents-heart-valves-vad\/","title":{"rendered":"Abrasive Blasting for Cardiovascular Medical Devices: Stents, Heart Valves, and VAD Components"},"content":{"rendered":"<p><script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"Abrasive Blasting for Cardiovascular Medical Devices: Stents, Heart Valves, and VAD Components\",\n            \"description\": \"Technical guide to abrasive blasting surface treatment for cardiovascular medical devices including vascular stents, mechanical heart valves, ventricular assist devices (VADs), and pacemaker enclosures \\u2014 media selection, process sequence, and ISO 10993 compliance.\",\n            \"datePublished\": \"2026-07-13\",\n            \"dateModified\": \"2026-07-13\",\n            \"author\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\\\/\"\n            },\n            \"publisher\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"logo\": {\n                    \"@type\": \"ImageObject\",\n                    \"url\": \"https:\\\/\\\/hlh-js.com\\\/wp-content\\\/uploads\\\/hlh-logo.png\"\n                }\n            },\n            \"mainEntityOfPage\": {\n                \"@type\": \"WebPage\",\n                \"@id\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/abrasive-blasting-cardiovascular-devices-stents-heart-valves-vad\\\/\"\n            }\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Is abrasive blasting used in stent manufacturing?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Yes, but as an intermediate step rather than a final surface treatment. Laser-cut metallic stents (316L stainless steel, cobalt-chromium alloy, nitinol) require removal of the recast layer and burrs left by laser cutting. Fine plastic media or glass bead blasting is used for intermediate deburring on complex strut geometries where mechanical deburring would be impractical. Blood-contact surfaces then proceed to electropolishing, which produces the ultra-smooth surface (Ra below 0.1 \\u03bcm) required for thromboresistance. Abrasive blasting is not used as the final surface treatment on blood-contacting stent surfaces.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What surface finish is required for blood-contacting cardiovascular device surfaces?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Blood-contacting surfaces of cardiovascular implants require the smoothest achievable finishes \\u2014 typically Ra below 0.1 \\u03bcm achieved by electropolishing for metallic components. Smooth surfaces minimize platelet adhesion and activation, reducing thrombosis risk. Abrasive blasting is used on non-blood-contacting structural components and housings of cardiovascular devices, but never as the final treatment on surfaces that contact blood. The biocompatibility requirements for blood-contacting surfaces are governed by ISO 10993-4 (interaction of devices with blood).\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"How are pacemaker titanium enclosures surface treated?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Pacemaker and ICD titanium cans are precision-machined and hermetically sealed by laser welding. Glass bead blasting is used on the titanium housing exterior to provide a consistent oxide layer condition and surface roughness before anodizing or the laser welding operation. For hermetic laser welding, the weld zone requires a well-characterized, clean titanium oxide surface for consistent weld penetration and seal quality. Glass bead blasting followed by ultrasonic cleaning provides this consistent surface condition. The exterior of the can is sometimes anodized for identification color coding after blasting.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What blasting media is safe for cardiovascular device components?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Glass beads are the most widely used media for cardiovascular device components \\u2014 they are non-contaminating, produce controlled matte or smooth surfaces, and leave no metallic residues. Fine plastic media (polyester or melamine, 75\\u2013150 \\u03bcm) is used for delicate components where glass bead impact energy could cause dimensional change or induce stress in thin-walled structures. For stent deburring steps, very fine glass beads or plastic media at low pressure (1\\u20132 bar) are appropriate. Silica sand, coal slag, and any abrasive with heavy metal impurities or non-biocompatible residues must never be used.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What is the role of electropolishing versus abrasive blasting in cardiovascular devices?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Abrasive blasting and electropolishing serve complementary roles in cardiovascular device manufacturing. Blasting is a mechanical process used for deburring, surface preparation, and creating specific surface conditions before downstream operations. Electropolishing is an electrochemical process that dissolves surface material preferentially from peaks, producing an ultra-smooth, chemically clean, chromium-enriched surface ideal for blood contact. The typical process sequence for metallic stents is: laser cut \\u2192 clean \\u2192 glass bead or plastic media deburr \\u2192 clean \\u2192 electropolish \\u2192 passivate \\u2192 clean and package. Blasting precedes electropolishing; it is not an alternative to it for blood-contacting surfaces.\"\n                    }\n                }\n            ]\n        }\n    ]\n}<\/script> <style>\r\n.hlh-card*,.hlh-card*::before,.hlh-card*::after{box-sizing:border-box;margin:0;padding:0}\r\n.hlh-card{font-family:'Segoe UI',Arial,sans-serif;font-size:16px;line-height:1.78;color:#1e2a38;max-width:860px;margin:0 auto;padding:0 20px 64px}\r\n.hlh-card h1{font-size:clamp(1.65rem,3.5vw,2.2rem);font-weight:800;color:#1a3456;line-height:1.22;margin-bottom:20px}\r\n.hlh-card h2{font-size:clamp(1.18rem,2.5vw,1.46rem);font-weight:700;color:#1a3456;border-left:4px solid #d86e18;padding-left:14px;margin:50px 0 16px}\r\n.hlh-card h3{font-size:1.05rem;font-weight:700;color:#1a3456;margin:28px 0 10px}\r\n.hlh-card p{margin-bottom:16px}\r\n.hlh-card ul,.hlh-card ol{padding-left:22px;margin-bottom:16px}\r\n.hlh-card li{margin-bottom:7px}\r\n.hlh-card a{color:#d86e18;text-decoration:none}\r\n.hlh-card 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a{display:inline-block;background:#d86e18;color:#fff;font-weight:700;padding:13px 30px;border-radius:5px;font-size:.96rem;text-decoration:none}\r\n.hlh-card-cta a:hover{background:#b85c12;text-decoration:none}\r\n@media(max-width:600px){.hlh-card-hero,.hlh-card-cta{padding:26px 18px}}\r\n<\/style><\/p>\r\n<div class=\"hlh-card\"><a class=\"hlh-card-back\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-surface-treatment-medical-devices\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u2190 Abrasive Blasting for Medical Devices: Complete Guide<\/a>\r\n<h1>Abrasive Blasting for Cardiovascular Medical Devices: Stents, Heart Valves, and VAD Components<\/h1>\r\n<div class=\"hlh-card-hero\">\r\n<div class=\"hlh-card-hero-tag\">In-Depth Guide \u00b7 Medical Device Series \u00b7 C04<\/div>\r\n<p>Cardiovascular medical devices operate in the most demanding biological environment imaginable: direct, continuous contact with flowing blood, under cyclic mechanical stress measured in billions of cycles over a device lifetime. The surface of every blood-contacting component determines whether that component remains thromboresistant, biocompatible, and mechanically durable for the duration of its service life. Abrasive blasting plays a precisely defined role in cardiovascular device manufacturing \u2014 not as a blood-contact surface finish, but as a critical intermediate process that enables the downstream treatments that achieve blood compatibility: electropolishing, anodizing, and precision coating. Understanding where blasting fits in cardiovascular device production, and what it must not do, is essential for any manufacturer in this space.<\/p>\r\n<\/div>\r\n<nav class=\"hlh-card-toc\" aria-label=\"Table des mati\u00e8res\">\r\n<div class=\"hlh-card-toc-label\">Table of Contents<\/div>\r\n<ol>\r\n<li><a href=\"#cv-requirements\">Surface Requirements in Cardiovascular Devices<\/a><\/li>\r\n<li><a href=\"#cv-stents\">Vascular Stents: Laser Cutting, Deburring, and the Path to Electropolishing<\/a><\/li>\r\n<li><a href=\"#cv-valves\">Mechanical Heart Valves and Structural Components<\/a><\/li>\r\n<li><a href=\"#cv-vad\">Ventricular Assist Devices (VADs)<\/a><\/li>\r\n<li><a href=\"#cv-pacemaker\">Pacemaker and ICD Titanium Enclosures<\/a><\/li>\r\n<li><a href=\"#cv-media\">Media Selection for Cardiovascular Device Components<\/a><\/li>\r\n<li><a href=\"#cv-compliance\">Biocompatibility and ISO 10993 Requirements<\/a><\/li>\r\n<li><a href=\"#cv-faq\">Questions fr\u00e9quemment pos\u00e9es<\/a><\/li>\r\n<\/ol>\r\n<\/nav>\r\n<h2 id=\"cv-requirements\">1. Surface Requirements in Cardiovascular Devices<\/h2>\r\n<p>Blood compatibility is the overriding surface requirement for cardiovascular implants. When a foreign material surface contacts flowing blood, the sequence of biological events determines whether the device functions safely or triggers pathological clotting. Within seconds of blood contact, plasma proteins adsorb onto the surface. Platelet adhesion and activation follow within minutes. If unchecked, this can lead to thrombus formation on the device surface \u2014 a potentially life-threatening complication for patients with coronary stents (in-stent thrombosis), mechanical heart valves (thromboembolism), or ventricular assist devices (pump thrombosis).<\/p>\r\n<p>Surface smoothness is the primary engineering variable for thromboresistance on metallic cardiovascular surfaces. Smooth surfaces minimize the area and topographic complexity available for platelet adhesion and entrapment. This is why blood-contacting metallic cardiovascular surfaces \u2014 stent struts, heart valve occluders, VAD blood-pump internals \u2014 are electropolished to Ra values below 0.1 \u03bcm, and why abrasive blasting is emphatically not the final surface treatment on these surfaces. Blasting&#8217;s role is upstream of this: it is the deburring and surface preparation step that makes the electropolishing or other downstream treatment effective and reliable.<\/p>\r\n<div class=\"hlh-card-callout\"><strong>Key principle:<\/strong> In cardiovascular device manufacturing, abrasive blasting is a preparation step, not a final surface treatment for blood-contacting surfaces. Blasting followed by electropolishing, anodizing, or precision coating is the production sequence. Blasting is used as the final treatment only on external, non-blood-contacting structural components such as housings, frames, and enclosures.<\/div>\r\n<h2 id=\"cv-stents\">2. Vascular Stents: Laser Cutting, Deburring, and the Path to Electropolishing<\/h2>\r\n<p>Modern coronary and peripheral vascular stents are manufactured by laser cutting complex strut patterns from thin-walled metallic tubing \u2014 316L stainless steel, cobalt-chromium alloys (L-605, MP35N), platinum-chromium alloys, or nitinol (nickel-titanium). Laser cutting is precise and capable of producing the intricate geometries required for modern stent designs, but it leaves the cut surfaces with a recast layer \u2014 a zone of re-solidified material with altered microstructure, elevated surface roughness, and debris particles fused to the strut edges. This recast layer must be removed completely before the stent can be electropolished to blood-contact specifications.<\/p>\r\n<p>Mechanical deburring methods \u2014 tumbling, brushing, waterjet \u2014 struggle with the complex three-dimensional geometry of modern stent struts, which have features too fine and interconnected for mechanical tools to access uniformly. This is where fine abrasive blasting plays its role: plastic media blasting or fine glass bead blasting at low pressure (1\u20132 bar) can access the laser-cut strut edges and surfaces uniformly, even in complex curvatures and intersections, dislodging the recast layer debris and reducing the burr height before electropolishing.<\/p>\r\n<div class=\"hlh-card-table-wrap\">\r\n<table class=\"hlh-card-table\">\r\n<thead>\r\n<tr>\r\n<th>Stent Manufacturing Step<\/th>\r\n<th>Surface Effect<\/th>\r\n<th>Abrasive Blasting Role<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>Laser tube cutting<\/td>\r\n<td>Creates recast layer, HAZ, burrs on strut edges; Ra 2\u20138 \u03bcm<\/td>\r\n<td>None at this step<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Initial cleaning<\/td>\r\n<td>Removes loose debris and cutting assist gas residues<\/td>\r\n<td>Aucun<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Abrasive blasting (optional)<\/td>\r\n<td>Dislodges recast layer debris, reduces burr height; Ra improvement to 1\u20133 \u03bcm<\/td>\r\n<td>Fine plastic media or glass beads, 1\u20132 bar, 50\u2013100 \u03bcm media; intermediate deburring only<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Electropolishing<\/td>\r\n<td>Removes material from surface peaks; produces Ra &lt; 0.1 \u03bcm blood-contact finish<\/td>\r\n<td>None; blasting must be complete before this step<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Passivation \/ final clean<\/td>\r\n<td>Builds passive layer; final cleaning for packaging<\/td>\r\n<td>Aucun<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<p>Not all stent manufacturers use abrasive blasting in this sequence. Some rely entirely on electropolishing to remove the recast layer, which requires longer electropolishing times and more material removal. Where blasting is used, it reduces electropolishing time and material removal, improving dimensional consistency of the final stent strut geometry. The decision to include or exclude blasting is made during process development and validated as part of the overall manufacturing process validation.<\/p>\r\n<h2 id=\"cv-valves\">3. Mechanical Heart Valves and Structural Components<\/h2>\r\n<p>Mechanical heart valves consist of a titanium or stainless steel valve housing (the orifice ring and sewing ring carrier), pyrolytic carbon or CoCr occluder elements (tilting discs or bileaflet hinged flaps), and a PTFE or polyester sewing ring for suture attachment. The pyrolytic carbon occluder surfaces are precision-fabricated with mirror-smooth surfaces that do not undergo blasting. The titanium and stainless steel structural components, however, are treated with abrasive blasting at appropriate stages.<\/p>\r\n<p>Titanium valve housings are glass bead blasted on external (non-blood-contacting) surfaces before anodizing, providing a clean, controlled titanium oxide condition for consistent anodize layer quality. Internal blood-contacting titanium surfaces are electropolished. Stainless steel sewing ring carriers are glass bead blasted and passivated before textile attachment. The blasting creates a consistent, clean metal surface for reliable adhesion of the polymer sewing ring to the metallic carrier ring.<\/p>\r\n<h2 id=\"cv-vad\">4. Ventricular Assist Devices (VADs)<\/h2>\r\n<p>Ventricular assist devices are blood pumps implanted in patients with end-stage heart failure to supplement or replace the pumping function of the failing ventricle. Modern continuous-flow VADs (axial-flow and centrifugal-flow pumps) consist of a titanium pump housing, impeller, bearing system, and motor. The internal blood-contacting surfaces of the pump housing and impeller are polished to the smoothest achievable finish to minimize thrombosis risk \u2014 these surfaces are not blasted.<\/p>\r\n<p>External titanium housing surfaces are glass bead blasted before anodizing. This serves two functions: producing a consistent surface for uniform anodize layer quality, and creating a slightly rougher external housing surface that promotes tissue ingrowth around the percutaneous driveline exit site and the pump pocket \u2014 locations where tissue integration improves patient outcomes by reducing infection risk. The titanium driveline connector surfaces are also blasted and anodized. All blasting on VAD components is performed under documented, validated conditions with full traceability to device history records.<\/p>\r\n<h2 id=\"cv-pacemaker\">5. Pacemaker and ICD Titanium Enclosures<\/h2>\r\n<p>Pacemaker and implantable cardioverter-defibrillator (ICD) titanium cans are among the most precisely manufactured and rigorously quality-controlled titanium components in medical device production. The hermetic seal between the titanium housing halves \u2014 achieved by laser welding \u2014 must be flawless: any defect allows body fluid ingress that destroys the electronics and can cause device failure with potentially fatal consequences.<\/p>\r\n<p>Glass bead blasting of the titanium can exterior serves several functions in this context. Before laser welding, the weld zone surface condition is critical for achieving consistent weld penetration depth and bead geometry. Blasting the weld zone to a defined Ra (typically 0.5\u20131.5 \u03bcm) removes the native oxide layer variation that accumulates during storage and handling, presenting a consistent metallic surface to the laser. The uniformity of titanium oxide layer thickness in the weld zone directly affects laser energy absorption and therefore weld quality consistency. Post-weld, the exterior of the can is sometimes anodized in different colors (using voltage-controlled titanium anodize, which produces interference colors from TiO\u2082 layer thickness) for product identification. Blasting before anodizing ensures a consistent surface for uniform color anodize quality.<\/p>\r\n<div class=\"hlh-card-devices\">\r\n<div class=\"hlh-card-device\"><span class=\"hlh-card-device-icon\">\ud83e\ude7a<\/span>\r\n<h3>Pacemaker Cans<\/h3>\r\n<p>Ti exterior: glass bead blast \u2192 anodize or laser weld prep. Internal electronics: no blasting. Hermetic laser weld zone: controlled oxide condition.<\/p>\r\n<\/div>\r\n<div class=\"hlh-card-device\"><span class=\"hlh-card-device-icon\">\u26a1<\/span>\r\n<h3>ICD Enclosures<\/h3>\r\n<p>Same as pacemaker but larger. High-voltage capacitor chamber components: glass bead blasting for cleaning and surface preparation before assembly.<\/p>\r\n<\/div>\r\n<div class=\"hlh-card-device\"><span class=\"hlh-card-device-icon\">\ud83d\udd0c<\/span>\r\n<h3>Lead Connectors (IS-1, DF-4)<\/h3>\r\n<p>Ti or PtIr connector pins: precision geometry critical; masking of connector contact surfaces before blasting of housing areas.<\/p>\r\n<\/div>\r\n<div class=\"hlh-card-device\"><span class=\"hlh-card-device-icon\">\ud83d\udc89<\/span>\r\n<h3>Neurostimulator Cans<\/h3>\r\n<p>Similar to pacemaker process. Ti or Ti alloy. Exterior blasted and anodized. Internal surfaces and electrode contact points not blasted.<\/p>\r\n<\/div>\r\n<\/div>\r\n<h2 id=\"cv-media\">6. Media Selection for Cardiovascular Device Components<\/h2>\r\n<div class=\"hlh-card-table-wrap\">\r\n<table class=\"hlh-card-table\">\r\n<thead>\r\n<tr>\r\n<th>Composant<\/th>\r\n<th>Mat\u00e9riau<\/th>\r\n<th>Blasting Application<\/th>\r\n<th>Media<\/th>\r\n<th>Pressure<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>Stent (intermediate deburr)<\/td>\r\n<td>316L SS, CoCr, nitinol<\/td>\r\n<td>Recast layer dislodging before electropolish<\/td>\r\n<td>Fine plastic media or fine glass beads (50\u2013100 \u03bcm)<\/td>\r\n<td>1\u20132 bar<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Heart valve housing (exterior)<\/td>\r\n<td>Titane<\/td>\r\n<td>Pre-anodize surface preparation<\/td>\r\n<td>Glass beads #12\u2013#13<\/td>\r\n<td>1.5\u20132.0 bar<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Sewing ring carrier<\/td>\r\n<td>316L SS<\/td>\r\n<td>Pre-textile-attachment cleaning and surface prep<\/td>\r\n<td>Glass beads #10\u2013#12<\/td>\r\n<td>2.0\u20132.5 bar<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>VAD pump housing (exterior)<\/td>\r\n<td>Titane<\/td>\r\n<td>Pre-anodize; tissue integration surface<\/td>\r\n<td>Glass beads #12<\/td>\r\n<td>1.5\u20132.0 bar<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Pacemaker \/ ICD can<\/td>\r\n<td>Titane<\/td>\r\n<td>Weld zone prep; pre-anodize exterior<\/td>\r\n<td>Glass beads #12\u2013#13<\/td>\r\n<td>1.5\u20132.0 bar<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<h2 id=\"cv-compliance\">7. Biocompatibility and ISO 10993 Requirements<\/h2>\r\n<p>All cardiovascular medical devices implanted in blood-contacting applications are subject to biocompatibility evaluation per ISO 10993, with specific requirements for blood interaction governed by ISO 10993-4 (Selection of Tests for Interactions with Blood). The surface treatment process \u2014 including any blasting steps and the final surface condition they produce \u2014 directly affects the outcome of biocompatibility testing.<\/p>\r\n<p>Because cardiovascular devices have blood-contact surfaces that must meet thromboresistance criteria, the device is tested as manufactured \u2014 meaning after all surface treatment steps including blasting, electropolishing, passivation, and any coating. Any change in the blasting process (media type, parameters) or the downstream surface treatment (electropolish chemistry, passivation method) could alter the surface chemistry and topography enough to require re-testing per ISO 10993-4. This makes process control and change management particularly critical in cardiovascular device manufacturing.<\/p>\r\n<div class=\"hlh-card-related\">\r\n<h3>Related Guides in This Series<\/h3>\r\n<a href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-cobalt-chrome-aluminum-medical-components-surface-preparation\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u2192 Blasting CoCr and Aluminum Medical Components<\/a> <a href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-media-medical-device-blasting-glass-beads-aluminum-oxide-tio2-zirconia-comparison\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u2192 Abrasive Media Comparison for Medical Device Blasting<\/a> <a href=\"https:\/\/hlh-js.com\/resource\/blog\/iso-13485-abrasive-blasting-special-process-validation-medical-device\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u2192 ISO 13485 Special Process Validation<\/a> <a href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-surface-treatment-medical-devices\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u2190 Complete Guide: Abrasive Blasting for Medical Devices<\/a><\/div>\r\n<h2 id=\"cv-faq\">8. Frequently Asked Questions<\/h2>\r\n<div>\r\n<div class=\"hlh-card-faq-item\"><button class=\"hlh-card-faq-btn\" aria-expanded=\"false\" aria-controls=\"cq1\">Is abrasive blasting used in stent manufacturing?<span class=\"hlh-card-faq-icon\">+<\/span><\/button>\r\n<div id=\"cq1\" class=\"hlh-card-faq-answer\">\r\n<p>Yes, as an intermediate step. Laser-cut stents require removal of the recast layer and burrs before electropolishing. Fine plastic media or glass bead blasting at 1\u20132 bar is used for intermediate deburring on complex strut geometries. Blood-contact stent surfaces then proceed to electropolishing, which achieves Ra below 0.1 \u03bcm required for thromboresistance. Abrasive blasting is never the final treatment on blood-contacting stent surfaces.<\/p>\r\n<\/div>\r\n<\/div>\r\n<div class=\"hlh-card-faq-item\"><button class=\"hlh-card-faq-btn\" aria-expanded=\"false\" aria-controls=\"cq2\">What surface finish is required for blood-contacting cardiovascular surfaces?<span class=\"hlh-card-faq-icon\">+<\/span><\/button>\r\n<div id=\"cq2\" class=\"hlh-card-faq-answer\">\r\n<p>Blood-contacting metallic cardiovascular surfaces require Ra below 0.1 \u03bcm, typically achieved by electropolishing. Smooth surfaces minimize platelet adhesion and thrombosis risk. Abrasive blasting is used on non-blood-contacting structural components and housings, but never as the final treatment on blood-contacting surfaces governed by ISO 10993-4.<\/p>\r\n<\/div>\r\n<\/div>\r\n<div class=\"hlh-card-faq-item\"><button class=\"hlh-card-faq-btn\" aria-expanded=\"false\" aria-controls=\"cq3\">How are pacemaker titanium enclosures surface treated?<span class=\"hlh-card-faq-icon\">+<\/span><\/button>\r\n<div id=\"cq3\" class=\"hlh-card-faq-answer\">\r\n<p>Glass bead blasting is applied to the titanium can exterior to provide a consistent oxide layer condition before laser welding (ensuring uniform weld penetration) and before anodizing (ensuring uniform color anodize quality). Internal electronic surfaces are not blasted. Blood is not in contact with the can exterior; ISO 10993 biocompatibility testing covers the full device including external tissue-contacting surfaces.<\/p>\r\n<\/div>\r\n<\/div>\r\n<div class=\"hlh-card-faq-item\"><button class=\"hlh-card-faq-btn\" aria-expanded=\"false\" aria-controls=\"cq4\">What blasting media is safe for cardiovascular device components?<span class=\"hlh-card-faq-icon\">+<\/span><\/button>\r\n<div id=\"cq4\" class=\"hlh-card-faq-answer\">\r\n<p>Glass beads are the most widely used for cardiovascular device components \u2014 non-contaminating, controlled finish, no metallic residues. Fine plastic media (75\u2013150 \u03bcm polyester\/melamine) is used for delicate thin-walled components. Silica sand, coal slag, and abrasives with heavy metal impurities are prohibited. All media must be characterizable for purity and fully removable by the qualified cleaning process.<\/p>\r\n<\/div>\r\n<\/div>\r\n<div class=\"hlh-card-faq-item\"><button class=\"hlh-card-faq-btn\" aria-expanded=\"false\" aria-controls=\"cq5\">What is the role of electropolishing versus blasting in cardiovascular devices?<span class=\"hlh-card-faq-icon\">+<\/span><\/button>\r\n<div id=\"cq5\" class=\"hlh-card-faq-answer\">\r\n<p>They are complementary, not alternatives. Blasting performs mechanical deburring and surface preparation for downstream operations. Electropolishing produces the ultra-smooth blood-contact finish by electrochemical material removal from surface peaks. The typical sequence for stents is: laser cut \u2192 clean \u2192 blast (deburr) \u2192 clean \u2192 electropolish \u2192 passivate \u2192 package. Blasting precedes electropolishing; it does not replace it for blood-contacting surfaces.<\/p>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<div class=\"hlh-card-cta\">\r\n<h2>Source Blasting Media for Cardiovascular Device Manufacturing<\/h2>\r\n<p>Jiangsu Henglihong Technology supplies glass beads and plastic media for cardiovascular device manufacturing with full documentation for ISO 13485 supplier qualification and ISO 10993 biocompatibility support.<\/p>\r\n<a href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener noreferrer\">Request Technical Data &amp; Quote<\/a><\/div>\r\n<\/div>\r\n<p><script>(function(){var b=document.querySelectorAll('.hlh-card-faq-btn');b.forEach(function(btn){btn.addEventListener('click',function(){var e=this.getAttribute('aria-expanded')==='true',a=document.getElementById(this.getAttribute('aria-controls'));b.forEach(function(x){x.setAttribute('aria-expanded','false');var y=document.getElementById(x.getAttribute('aria-controls'));if(y)y.style.maxHeight='0'});if(!e){this.setAttribute('aria-expanded','true');a.style.maxHeight=a.scrollHeight+'px'}})})})();<\/script><\/p>","protected":false},"excerpt":{"rendered":"<p>\u2190 Abrasive Blasting for Medical Devices: Complete Guide Abrasive Blasting  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":13646,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-13644","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13644","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/comments?post=13644"}],"version-history":[{"count":3,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13644\/revisions"}],"predecessor-version":[{"id":13683,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13644\/revisions\/13683"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media\/13646"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media?parent=13644"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/categories?post=13644"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/tags?post=13644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}