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Technical Brief

Novel Device For Removal of Blot Clot Obstructions in Drainage Tubes

[+] Author and Article Information
Scott M. Thompson

General Surgery,
Department of Surgery,
Mayo Clinic College of Medicine,
200 First Street SW,
Rochester, MN 55905;
Department of Radiology,
Mayo Clinic College of Medicine,
200 First Street SW,
Rochester, MN 55905

Cornelius A. Thiels

General Surgery,
Department of Surgery
Mayo Clinic College of Medicine,
200 First Street SW,
Rochester, MN 55905

Johnathon M. Aho

Division of General Thoracic Surgery,
Department of Surgery,
Mayo Clinic College of Medicine,
200 First Street SW,
Rochester, MN 55905;
Department of Physiology and Biomedical Engineering,
Mayo Clinic College of Medicine,
200 First Street SW,
Rochester, MN 55905
e-mail: aho.johnathon@mayo.edu

1Corresponding author.

Manuscript received May 9, 2016; final manuscript received October 16, 2016; published online December 21, 2016. Assoc. Editor: Michael Eggen.

J. Med. Devices 11(1), 014504 (Dec 21, 2016) (3 pages) Paper No: MED-16-1220; doi: 10.1115/1.4035128 History: Received May 09, 2016; Revised October 16, 2016

Medical drains frequently become obstructed requiring removal or re-intervention. Currently, there is no widely accepted practice for maintaining drain patency. A simple device to remove obstructions from medical drains may have significant benefit. We manufactured a prototype drain clot extractor (DCE) for extracting obstructions. Fresh nonanticoagulated swine blood was instilled within drainage tubes of 16, 20, and 32 French (n = 2 for each size) to generate a 4 cm blood clot. The operator was then equipped with a 0.035 in. guidewire (GW) and given 2.5 min to attempt removal while blinded. Similarly, the operator was equipped with the DCE. Volumes removed were determined by volume displacement and by drain size and method of removal. Comparison of DCE to GW by analysis of variance and means comparison using Tukey were used for statistical analysis. The DCE facilitated mechanical removal of obstructions for 16, 20, and 32 French drainage tubes. Volumes removed: 16 French (GW mean 10% volume, DCE mean 70% volume p = 0.02); 20 French (GW mean 12.5% volume, DCE mean 75% volume p = 0.01); 32 French (GW mean 37.5% volume, DCE mean 100% volume p = 0.01). DCE volume removal had no dependence on drain size (p > 0.05). This device may have utility for reducing morbidity from early drain discontinuation or replacement. Further in vivo and clinical studies are needed to determine the safety, feasibility, and efficacy of this device as tool for removing medical drainage obstructions.

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Copyright © 2017 by ASME
Topics: Drainage , Biomedicine , Blood
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References

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Figures

Grahic Jump Location
Fig. 1

(a) Distal working end of the obstruction removal device in the deployed state, (b) 0.035 guidewire in a 32 French chest tube, with incomplete removal of the obstruction, (c) obstruction removal device collapsed in 32 French chest tube, and (d) Percentage of obstruction removal for 16, 20, and 32 French chest tubes using 0.035 guidewire (GW) compared to obstruction removal device (DCE)

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