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Minerva Anestesiologica 2018 July;84(7):803-10

DOI: 10.23736/S0375-9393.18.12552-1

Copyright © 2018 EDIZIONI MINERVA MEDICA

language: English

Preliminary experience with epidural and perineural catheter localization with pulsed wave Doppler ultrasonography

Hesham ELSHARKAWY 1, 2 , Theresa BARNES 3, Rovnat BABAZADE 4, 5, Maria HUARTE 3, Wael ALI SAKR ESA 3, 6, Brian M. ILFELD 5, 6

1 CCLCM of Case Western Reserve University, Department of General Anesthesiology, Cleveland, OH, USA; 2 Department of Outcomes Research, Cleveland Clinic, Cleveland, OH, USA; 3 Department of General Anesthesia and Pain Management, Cleveland Clinic, Cleveland, OH, USA; 4 Department of Anesthesiology, University of Texas Medical Branch, Galveston, TX, USA; 5 Outcomes Research Consortium, Cleveland Clinic, Cleveland, OH, USA; 6 Division of Regional Anesthesia and Acute Pain Medicine Department of Anesthesiology, University of California, San Diego, CA, USA



BACKGROUND: Various methods for peripheral nerve and epidural catheter location assessment exist, with varying degrees of ease of use, utility, and accuracy. Pulsed wave Doppler (PWD) evaluates the presence of fluid flow and is possible modality to assess the location of a percutaneously inserted perineural catheter.
METHODS: A retrospective chart review was conducted in which PWD ultrasonography was used to confirm the position of nerve catheters for regional anesthesia. Data was collected to assess 24-hour postoperative pain scores, opioid consumption, complications, and the incidence of catheter replacement.
RESULTS: Eighty-six patients were included; average age was 58 years and a 27% incidence of chronic pain. These catheters were left in place based on the PWD images. Three catheters failed and a total of 16 catheters were repositioned. In the first 24 hours average pain scores ranges between 3.5 to 5.9 and median postoperative opioid consumption range was 11.3 mg to 60.8 mg. For epidural catheters, PWD changes were more obvious with air injection and there was only one episode of hemodynamic instability.
CONCLUSIONS: Our preliminary experience with PWD ultrasonography suggests that they may offer the ability to selectively assess flow at different locations to identify the proper location of epidural and perineural catheters. Future randomized, controlled investigations are warranted to further evaluate the effectiveness and safety of this modality.


KEY WORDS: Ultrasonography, Doppler, pulsed - Ultrasonography - Nerve block

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