Less leakage and dislodgement with a catheter-over-needle versus a catheter-through-needle approach for peripheral nerve block: an ex vivo study

Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie
Ban Tsui, Jenkin Tsui

Abstract

The objective of this study was to compare the catheter-through-needle (CTN) and catheter-over-needle (CON) catheterization techniques ex vivo by measuring leak pressure around the catheter and the catheter's resistance to pulling force. Using an ex vivo porcine limb model, we compared the conventional CTN design with the CON design with respect to the ability to resist leakage at the catheter insertion site under high injection pressure and the force required to withdraw the catheter from tissue. One CON assembly (MultiSet, Pajunk) and three CTN assemblies (Contiplex, B.Braun; StimuCath, Arrow; Stimulong Sono, Pajunk) were studied. Ten porcine hind limbs were used to test leakage and another ten were used to measure withdrawal force. Catheters were placed at angles of 15° and 30° at depths of 3 cm and 5 cm. Leakage was assessed visually at the insertion site, and pressure was measured at the moment leakage occurred. Withdrawal force was measured by pulling the catheter from the tissue. No evidence of leakage was detected at the CON catheter insertion site at the highest pressure applied (1,000 mmHg) (n = 40). The CON assembly withstood significantly higher injection pressure than the CTN catheters without causing leaks at the ...Continue Reading

References

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Citations

Oct 12, 2012·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Vivian IpBan Tsui
Mar 6, 2013·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Vivian H Y Ip, Ban C H Tsui
Jun 27, 2013·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Timothy J Shakespeare, Ban C H Tsui
Mar 20, 2014·British Journal of Anaesthesia·B C Tsui, V H Ip
Jun 10, 2016·Regional Anesthesia and Pain Medicine·Andrea TognùStefano Bonarelli
Sep 12, 2015·Current Opinion in Anaesthesiology·Anthony T Machi, Brian M Ilfeld
Feb 13, 2021·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Jonathan Jenkin Tsui
Mar 11, 2021·Regional Anesthesia and Pain Medicine·Ban C H TsuiRichard Drake

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