Zanger Heparin Cannula – Stainless Steel Fine-Bore Cannula for Heparinized Irrigation in Cardiovascular Surgery (PS-7803)

The Zanger Heparin Cannula (PS-7803) is a reusable stainless steel surgical cannula designed for the controlled delivery of heparinized saline or other anticoagulant irrigation solutions during cardiovascular and cardiac surgical procedures, addressing the clinical need to maintain patency and prevent intraoperative thrombus formation in small vessels, grafts, and cannulation sites. The fine-bore stainless steel construction provides a rigid, precisely dimensioned cannula suited to the controlled, low-volume irrigation and infusion tasks of cardiac and vascular surgery, where a flexible catheter-type device would not provide the positional stability and tactile feedback the surgeon requires when introducing the cannula tip into a vessel lumen, graft, or cannulation site. The smooth, polished cannula tip is designed for atraumatic introduction into vascular structures, minimizing the risk of intimal injury at the point of cannula insertion. Manufactured from stainless steel for the corrosion resistance and dimensional stability required of a reusable instrument that undergoes repeated steam autoclave sterilization between cardiac surgical procedures. Used by cardiac surgeons, cardiovascular surgeons, and perfusionists in hospital cardiac surgical theaters and cardiovascular surgical units. Sold as 1 piece.

Heparinized Irrigation in Cardiac and Vascular Surgery: Clinical Purpose

Heparin is the standard anticoagulant used intraoperatively in cardiac and vascular surgery to prevent thrombus formation at sites where blood flow is interrupted, slowed, or exposed to foreign surfaces — conditions that activate the coagulation cascade and risk clot formation that can occlude a graft, cannulation site, or native vessel if not controlled. The Zanger Heparin Cannula provides the means to deliver heparinized saline solution directly to specific sites during the procedure where local anticoagulant irrigation is needed — flushing a coronary artery or graft segment before anastomosis to clear residual blood and prevent clot formation in the temporarily occluded vessel segment, irrigating a cannulation site during establishment or adjustment of cardiopulmonary bypass cannulae, and maintaining patency in small-caliber vessels or graft conduits during the period between vessel preparation and completion of an anastomosis when blood flow through that segment is interrupted. The cannula's fine bore allows precise, low-volume delivery appropriate to these applications, where flooding the surgical field with excess irrigation fluid would be undesirable, while still providing adequate flow to achieve effective local anticoagulant distribution at the target site.

Cardiovascular Surgery Applications: Coronary Bypass, Vascular Anastomosis, and Cannulation Sites

In coronary artery bypass grafting, the Zanger Heparin Cannula is used during preparation of the target coronary artery and the graft conduit — whether saphenous vein, internal mammary artery, or radial artery — to irrigate the lumen of both the native coronary artery segment and the graft with heparinized saline before the anastomosis is constructed, clearing blood and preventing clot formation in the temporarily occluded segments during the time required to complete the suture line. This local heparinization at the anastomosis site is performed in addition to, not instead of, systemic heparinization administered for cardiopulmonary bypass, providing targeted anticoagulant effect at the specific vessel segments under direct surgical manipulation. In peripheral vascular and other vascular surgical procedures involving vessel clamping and anastomosis — including arteriovenous fistula and graft formation for hemodialysis access — the cannula serves the same function, irrigating the isolated vessel segment with heparinized solution during the period of flow interruption required for the anastomosis. During establishment of cardiopulmonary bypass cannulation — arterial and venous cannulation of the great vessels or peripheral vessels depending on the cannulation strategy — the cannula can be used to irrigate the cannulation site and confirm cannula position and flow before full bypass flow is established, an application where the precise, controlled delivery the fine-bore cannula provides is preferable to a larger-bore irrigation device that would deliver an imprecise volume to a small surgical field.

Atraumatic Tip Design and Stainless Steel Construction

The smooth, polished tip of the Zanger Heparin Cannula is designed to minimize the risk of intimal injury when the cannula is introduced into a vessel lumen or graft segment — a critical design consideration because any disruption to the vascular intima at the site of cannula introduction can itself become a focus for thrombus formation or, in the case of an arterial anastomosis, can compromise the integrity of the vessel wall at a location that will bear the hemodynamic stresses of arterial pressure once flow is restored. The stainless steel construction provides the rigidity needed for the surgeon to introduce the cannula tip into a small-caliber vessel with the tactile feedback and positional control that a rigid instrument provides — control that is particularly important when working with vessels of the diameter typically encountered in coronary artery bypass grafting, where the target coronary arteries and graft conduits may be only a few millimetres in diameter. The stainless steel construction also provides the corrosion resistance and dimensional stability required for repeated steam autoclave sterilization, maintaining the cannula's precise bore dimensions and tip geometry across its service life — dimensional consistency that is important both for the controlled flow delivery the cannula provides and for the atraumatic tip profile that minimizes vascular injury risk.

Sterilization and Reprocessing Between Procedures

The Zanger Heparin Cannula is fully compatible with steam autoclave sterilization at 134°C pre-vacuum parameters, the standard method for reusable cardiovascular surgical instruments. Before sterilization, the cannula's internal bore should be thoroughly flushed and cleaned to remove any residual blood, heparinized saline, or other fluids from the previous procedure — a fine-bore instrument is particularly susceptible to internal residue accumulation, and any obstruction or narrowing of the bore from residual material would compromise the precise, controlled flow delivery that is the cannula's primary function. Enzymatic cleaning with bore-brushing or flushing capability is recommended to ensure the internal lumen is fully clear before terminal sterilization. The cannula tip should be inspected at each reprocessing cycle for any damage to the smooth, polished surface that could compromise the atraumatic insertion characteristics — any roughness, burring, or deformation at the tip increases the risk of vascular injury on subsequent use and is grounds for removing the instrument from clinical service.

CE Mark, ISO 13485, and FDA Certification for Cardiovascular Instrument Procurement

The Zanger Heparin Cannula PS-7803 is manufactured under a quality management system certified to ISO 13485, governing stainless steel material sourcing, precision machining of the fine-bore cannula body and atraumatic tip, dimensional inspection, surface finishing, and packaging. CE Mark certification confirms conformity with European Medical Device Regulation requirements for Class I reusable surgical instruments distributed within EU and associated regulatory territories. FDA compliance documentation is maintained for United States distribution, satisfying regulatory requirements for reusable cardiovascular surgical instruments procured by US hospitals, cardiac surgical units, and surgical instrument distributors. These certifications satisfy procurement and tender documentation requirements of institutional buyers in the USA, India, Pakistan, Vietnam, and across international surgical instrument supply frameworks. Certificates of conformity and quality management system documentation are available on request. OEM manufacturing is available within the same certified manufacturing framework.

Product Specifications

Frequently Asked Questions

What is the Zanger Heparin Cannula used for during cardiac surgery?
The Zanger Heparin Cannula is used to deliver heparinized saline solution to specific vessel segments, grafts, or cannulation sites during cardiac and vascular surgical procedures, providing local anticoagulant irrigation at points where blood flow has been interrupted by surgical clamping or where a graft conduit is being prepared for anastomosis. In coronary artery bypass grafting, the cannula is used to flush the lumen of the target coronary artery segment and the graft conduit with heparinized saline before the anastomosis is constructed, clearing residual blood and preventing thrombus formation in the temporarily occluded segments during the time required to complete the suture line. This local heparinization at the surgical site supplements the systemic heparinization administered for cardiopulmonary bypass, providing targeted anticoagulant effect exactly where the surgeon is working. The cannula's fine bore provides precise, controlled, low-volume delivery appropriate for these applications, avoiding the field-flooding that a larger-bore irrigation instrument would produce.

Why is a rigid stainless steel cannula used rather than a flexible catheter for this application?
The rigid stainless steel construction of the Zanger Heparin Cannula provides the positional control and tactile feedback the surgeon needs when introducing the cannula tip into the lumen of a small-caliber vessel, graft conduit, or cannulation site — control that a flexible catheter-type device, designed to follow the path of a vessel under guidewire or threading technique, does not provide in the same way. For the cardiac and vascular surgical applications this cannula is designed for, the surgeon is working under direct visualization in an open surgical field, introducing the cannula tip into a vessel that may be only a few millimetres in diameter, and the rigidity of the stainless steel cannula allows precise tip placement and stable positioning during the brief irrigation step. The stainless steel construction also provides the durability and reprocessing compatibility appropriate for a reusable surgical instrument, in contrast to single-use flexible catheter devices designed for percutaneous vascular access applications, which serve a different clinical purpose.

What is the clinical significance of the atraumatic tip design?
The smooth, polished tip of the Zanger Heparin Cannula is specifically designed to minimize vascular intimal injury at the point where the cannula is introduced into a vessel lumen or graft segment. This is clinically important because any disruption to the inner vessel wall — the intima — at the cannula insertion site can itself become a nidus for thrombus formation, and in the context of an arterial anastomosis under construction, any injury to the vessel wall at or near the suture line can compromise the integrity of the completed anastomosis once arterial pressure is restored. The atraumatic tip is therefore not a minor design detail but addresses a direct risk pathway: a roughened or burred cannula tip introduced into a coronary artery or graft segment during bypass surgery could create exactly the kind of vessel wall injury that the heparinized irrigation is intended to help prevent thrombus formation around. This is why tip condition is a priority inspection point during reprocessing.

What sterilization protocol is recommended, and what should be checked before each use?
The Zanger Heparin Cannula is compatible with steam autoclave sterilization at 134°C pre-vacuum parameters, the standard method for reusable cardiovascular instruments. Before sterilization, the internal bore must be thoroughly flushed and cleaned to remove any residual blood or heparinized saline from the previous use — as a fine-bore instrument, any residue left in the lumen can dry and partially or fully obstruct the bore, compromising the cannula's flow delivery function on subsequent use. Enzymatic cleaning with bore-flushing or brushing is recommended. Before each use, the cannula tip should be inspected for any roughness, burring, or deformation of the smooth polished surface — any such damage compromises the atraumatic insertion characteristics that are central to the instrument's safe use and is grounds for removing the instrument from service.

What certifications does this instrument carry, and are bulk or OEM orders available?
The Zanger Heparin Cannula PS-7803 is manufactured under an ISO 13485-certified quality management system covering stainless steel material procurement, precision machining of the fine-bore cannula body and atraumatic tip, dimensional inspection, and packaging. CE Mark certification confirms conformity with European Medical Device Regulation requirements for Class I reusable surgical instruments. FDA compliance documentation supports United States distribution. Certificates of conformity are available on request for procurement and tender documentation. Bulk orders are accepted with a minimum of 1 piece, with volume pricing available for hospitals, cardiac surgical units, cardiovascular instrument distributors, and group purchasing organizations. OEM manufacturing for private-label branding is available within the same ISO 13485-certified framework. Free shipping applies on orders of $99 or more.