Optimization of venous return tubing diameter for cardiopulmonary bypass

Ni, Yiming; Leskosek, B.; Shi, Liping; Chen, Yinglian; Qian, Linfeng; Li, Renyuan; Tu, Zhengliang; Segesser, Ludwig K. von

doi:10.1016/s1010-7940(01)00840-5

Cited by 31 publications

(23 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Already at the iliac level, the vein diameter increases, and, therefore, the narrow segment of a well-positioned self-expanding cannula is relatively short. It has to be mentioned here that a crosssectional area of 1 cm 2 (equivalent to <34 F) is sufficient to carry up to 6 l min À1 with a 200-cm-long venous line relying on gravity alone [12].…”

Section: Discussionmentioning

confidence: 99%

Superior flow for bridge to life with self-expanding venous cannulas

Segesser

Kalējs

Ferrari

et al. 2009

European Journal of Cardio-Thoracic Surgery

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Superior flow for bridge to life with self-expanding venous cannulas

Segesser

Kalējs

Ferrari

et al. 2009

European Journal of Cardio-Thoracic Surgery

Self Cite

View full text Add to dashboard Cite

show abstract

“…7 Additional cannulas are the standard action for increasing blood flow and consecutively the gas transfer in such a situation and dual venous cannulation is one alternative. [8][9][10][11] In an open system, cannula flow and pressure drop is a function of cannula length and luminal width. As cannula diameter can be modified in vivo with the new design, the latter deserves further study.…”

mentioning

confidence: 99%

New Dual Lumen Self-Expanding Catheter Design Requiring Less Suction

Abdel-Sayed

Segesser²

2016

ASAIO Journal

View full text Add to dashboard Cite

Contribution of venovenous extracorporeal membrane oxygenation (v-v ECMO) to gas transfer is flow dependent. Catheter design is a key factor for optimal pressure/flow rate relationship. This study was designed for the assessment of a new self-expanding dual lumen catheter design versus the current standard. Outlet pressure/flow rate and inlet pressure/flow rate for a new Smart catheter with self-expanding dual lumen design constricted to 27 F with 5 mm long constrictor corresponding to the percutaneous path versus Avalon 27 F catheter (control) were compared on a flow bench with a Biomedicus centrifugal pump. Flow, pump inlet pressure and outlet pressure were determined at 500, 1,000, 1,500, 2,000, and 2,500 revolutions per minute (RPM). At 500 RPM and with a 5 mm long constrictor (1,000; 1,500; 2,000; and 2,500 RPM), catheter outlet pressure values were -0.13 ± 0.07 mm Hg (-2.55 ± 0.06; -7.38 ± 0.14; -15.03 ± 0.44; -26.46 ± 0.39) for self-expanding versus -2.93 ± 0.23* (-10.60 ± 0.14; -22.74 ± 0.34; -38.43 ± 0.41; -58.25 ± 0.40)*: p < 0.0001* for control. The flow values were 0.61 ± 0.01 L/min (1.64 ± 0.03, 2.78 ± 0.02; 4.07 ± 0.04; 5.37 ± 0.02) for self-expanding versus 1.13 ± 0.06*; (2.19 ± 0.04; 3.30 ± 0.03; 4.30 ± 0.03; 5.30 ± 0.03)*: p < 0.0001* for control. The corresponding catheter inlet flow rates of the self-expanding catheter were slightly more than that of the control. For the given setup, our evaluation demonstrated that the new dual lumen self-expanding catheter requires lower catheter outlet pressures for higher flows as compared to the current standard.

show abstract

“…[1][2][3][4] The amount of venous blood drained from the patient determines the flow rate that can be achieved during cardiopulmonary bypass (CPB), and end organ perfusion. Venous drainage defines also the amount of blood that stays in the patient's cardiovascular system during CPB.…”

mentioning

confidence: 99%

“…4 Improved flow of blood drainage can be achieved if better cannula designs are used as we have previously demonstrated for the Smartcanula (Smartcanula LLC, Lausanne, Switzerland), which is based on the "collapsed insertion and expansion in situ" principle. 2,12,13 With its self-expanding design, this device acts also as a spacer preventing the vein from collapsing, and therefore allows all collateral blood to be drained directly towards the pump oxygenator. A new, simplified, plastic self-expanding Smartcanula is designed for central insertion (trans-atrial insertion into the inferior vena cava), and prevention of caval collapse (Figure 1).…”

mentioning

confidence: 99%

Prevention of Caval Collapse During Venous Drainage for CPB

Abdel-Sayed

Favre²,

Taub³

et al. 2013

ASAIO Journal

View full text Add to dashboard Cite

A new plastic self-expanding Smartcanula (Smartcanula LLC, Lausanne, Switzerland) is designed for central insertion and prevention of caval collapse. The objective of our work is to assess the influence of the new design on atrial chatter. Caval collapse over the entire caval axis, right atrial, hepatic, renal vein, and iliac vein is realized in drainage tubes with holes at 5 cm distance intervals. Smartcanulas with various lengths (26 cm [= right atrial], 34 cm [= hepatic], 43 cm [= renal], and 53 cm [= iliac]) versus two-stage cannulas are compared. Pressure drop (ΔP) is measured using Millar pressure-transducers. Flow rate (Q) is measured using an ultrasonic flow meter. Cannula resistance is defined as the ΔP/Q ratio. Data display and recording are controlled using LabView virtual instruments. At an 88 cm height differential, Q values are 8.69 and 6.8 l/min, and ΔP/Q ratios are 0.63 and 1.28 for the 26-cm Smartcanula and the reference cannula, respectively. The 34-cm Smartcanula showed 8.89 l/min and 0.6 ΔP/Q ratio vs. 7.59 l/min and 0.9 for the control cannula (P < 0.05). The 43-cm and 53-cm Smartcanulas showed Q values of 9.04 and 8.81 l/min, respectively, and ΔP/Q2 ratio of 0.6. The Smartcanula outperforms the two-stage cannula, and direct cannula insertion without guide wire is effective.

show abstract

Optimization of venous return tubing diameter for cardiopulmonary bypass

Cited by 31 publications

References 5 publications

Superior flow for bridge to life with self-expanding venous cannulas

Superior flow for bridge to life with self-expanding venous cannulas

New Dual Lumen Self-Expanding Catheter Design Requiring Less Suction

Prevention of Caval Collapse During Venous Drainage for CPB

Contact Info

Product

Resources

About