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TECHNICAL PAPERS

Self-sealing, Large Bore Arterial Punctures: A Counterintuitive New Phenomenon

[+] Author and Article Information
Blayne A. Roeder, Farshid Sadeghi

School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1288

Charles F. Babbs

Department of Basic Medical Sciences, Purdue University, West Lafayette, IN 47907-1246

William E. Schoenlein

Department of Biomedical Engineering, Purdue University, West Lafayette, IN 47907-1296

Klod Kokini

School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1288Department of Biomedical Engineering, Purdue University, West Lafayette, IN 47907-1296

J Biomech Eng 124(4), 342-346 (Jul 30, 2002) (5 pages) doi:10.1115/1.1488935 History: Received October 01, 2000; Revised April 01, 2002; Online July 30, 2002
Copyright © 2002 by ASME
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References

Figures

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Standard (bevel-up) needle orientation compared to modified (bevel-down) needle orientation
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Leak rates for large bore carotid artery punctures in anesthetized pigs using standard (bevel-up) and modified (bevel-down) techniques with and without topical phenylephrine. Leak rates per 100 mmHg arterial pressure are shown after 1 min (○) and 3 min (▵) of compression following puncture. Black bars show median leak rates after 1 min of compression following puncture. White bars show median leak rates after 3 min of compression following puncture. For the modified technique with topical phenylephrine the median leak rate at 3 min was zero, i.e. the vessel self-sealed.
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Standard and modified needle insertions create distinct cut geometries and can be described by a needle entry angle. The needle entry angle (θ ) is the angle between the inner wall of a vessel and the cut in the wall. For needle entry angles greater than 90 degrees (Standard), pressure on the flap opens the wound. When the angle is less than 90 degrees (Modified), pressure on the flap closes the wound.
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A simple finite element model of a thick walled elastic tube with a “modified” puncture demonstrates self-sealing behavior. Displacement magnitude (mm) is plotted on the contour. The model was solved in ANSYS with a Young’s modulus of 1.60 MPa, Poisson’s Ratio of 0.45 and intraluminal pressure of 140 mmHg.

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