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The Venous Return Catheters are used to transport venous blood into the extracorporeal circuit during cardiopulmonary bypass.
The single-, two- and three-stage catheters are used during cardiac surgery. Venous single-stage catheters are inserted through the right atrial wall or auricular appendage into the superior and inferior vena cavae. The venous two-stage catheter is usually inserted through the right atrial appendage in order to position the distal end in the inferior vena cava and the opening at the proximal end of the distal part of the catheter in the right atrium.

The venous three-stage catheter is usually inserted via the superior vena cava and the atrium into the inferior vena cava. So, there is one opening per vessel segment.
There is a large variety of venous catheter models. So, Maquet can satisfy almost all cannulation requirements and surgical procedures.   

All single-, two- and three-stage venous catheters of Maquet are made of biocompatible materials. Their smooth surface minimizes the risk of hemolysis. All catheters are mainly flexible and transparent and have round and rigid tips. Most of the two- and three-stage catheters feature an obturator to minimize the blood loss during insertion. A lot of the catheters are wire-reinforced. It reduces the wall thickness and the risk of kinking. Furthermore, there are straight and bended catheters. Some single-stage catheters have a feature for suture fixation (ring). A few of the catheters have a vent plug. Some catheters have a pre-mounted connector. Most of the catheters have depth marks, which help at the positioning of the catheters. There are several options at tips (Bullet, Lighthouse, Basket, Pilot and Full Lumen) and at transitions of two-stage catheters (Bullet, Lighthouse, Basket and Meander) available.

Venous single-stage catheters
Length 22 cm, 25 cm, 33 cm, 40 cm
Length of short leg at bended catheters 1.5 cm,  2.5 cm,  3 cm,  4 cm,  5 cm, 6 cm, 7 cm, 8 cm or 9 cm
Connection (proximal) 1/4” (6.35 mm), 3/8” (9.53 mm) or 1/2” (12.7 mm)
Catheter body Straight or about 90° bended
Types of tips (distal) Bullet, Lighthouse, Pilot, Basket or Full Lumen
Outer diameters (tip) 12 Fr (4.0 mm), 14 Fr (4.7 mm), 16 Fr (5.3 mm), 18 Fr (6.0 mm), 20 Fr (6.7 mm), 21 Fr (7.0 mm), 22 Fr (7.3 mm), 24 Fr (8.0 mm), 26 Fr (8.7 mm), 28 Fr (9.3 mm), 30 Fr (10.0 mm), 32 Fr (10.6 mm), 34 Fr (11.3 mm), 36 Fr (12.0 mm), 40 Fr (13.3 mm), or 41 Fr (13.7 mm)
Reinforcement Wire-reinforced or non-reinforced
Optional pre-mounted components Ring for suture fixation and connector with or without Luer Lock branch and de-airing plug
Venous two-stage catheters
Length 37 cm, 40 cm, 42 cm, 47 cm or 52 cm
Length of distal part 4 cm, 6 cm, 7.5 cm, 8 cm, 9 cm or 11 cm
Length of short leg at bended catheters 16 cm or 20 cm
Connection (proximal) 3/8” (9.53) or 1/2” (12.7)
Catheter body Straight, about 90° or 120° bended
Optional cross-section shape in one section of the proximal catheter body Elliptical
Types of distal tips Bullet, Lighthouse or Basket
Types of transitions Bullet, Lighthouse, Basket or Meander
Outer diameters (distal tip) 28 Fr (9.3 mm), 32 Fr (10.7 mm), 34 Fr (11.3 mm) or 36 Fr (12.0 mm)
Outer diameters (proximal tip) 32 Fr (10.7 mm), 37 Fr (12.3 mm), 39 Fr (13.0 mm), 40 Fr (13.3 mm), 44 Fr (14.7 mm), 48 Fr (16.0 mm) or 51 Fr (17.0 mm)
Reinforcement Wire-reinforced (distal and proximal), non-reinforced (distal and proximal) or wire-reinforced (proximal) and non-reinforced (distal)
Optional pre-mounted components Connector with or without Luer Lock branch and de-airing plug
Optional enclosed components Obturator
Venous three-stage catheters
Length 40 cm
Connection (proximal) 3/8” (9.53)
Catheter body Straight
Types of distal tips Lighthouse
Types of transitions Lighthouse
Outer diameters (distal tip) 28 Fr (9.3 mm) or 32 Fr (10.7 mm)
Outer diameters (proximal tip) 32 Fr (10.7 mm) or 37 Fr (12.3 mm)
Reinforcement Wire-reinforced (distal and proximal)
Optional pre-mounted components Connector with or without Luer Lock branch and de-airing plug
Optional enclosed components Obturator

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