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J Wrist Surg 2022; 11(02): 154-160
DOI: 10.1055/s-0041-1735888
Scientific Article

CT Scan versus Saline Load Test for Detection of Traumatic Wrist Arthrotomy

Eric Perloff 
1   Division of Orthopaedic Surgery, Albany Medical Center, Albany, New York
,
Andrew Posner 
1   Division of Orthopaedic Surgery, Albany Medical Center, Albany, New York
,
Hamza Murtaza 
1   Division of Orthopaedic Surgery, Albany Medical Center, Albany, New York
,
Khushdeep Vig 
1   Division of Orthopaedic Surgery, Albany Medical Center, Albany, New York
,
Michael Smith
2   Department of Anatomy, Anatomical Gift Program, Albany Medical College, Albany, New York
,
Michael T. Mulligan
1   Division of Orthopaedic Surgery, Albany Medical Center, Albany, New York
› Institutsangaben Funding The funding was provided by the Division of Orthopaedics, Albany Medical Center. Funding was utilized for the CT scans needed for this study. The source of funding had no role of involvement within this study.
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Abstract

Background Traumatic arthrotomy of the wrist is most commonly detected using the saline load test (SLT); however, little data exists on the effectiveness of the SLT to this specific joint. The use of computed tomography (CT) scan has been validated as an alternative method to detect traumatic arthrotomy of the knee, as the presence of intra-articular air can be seen when there is violation of the joint capsule.

Question/Purpose The purpose of this study was to determine the ability of CT scan to identify arthrotomy of the wrist capsule and compare the diagnostic performance of CT versus traditional SLT.

Materials and Methods Ten fresh frozen cadavers which had undergone transhumeral amputation were initially used in this study. A baseline CT scan was performed to ensure no intra-articular air existed prior to intervention. After baseline CT, an arthrotomy was created at the 6R radiocarpal portal site. The wrists then underwent a postarthrotomy CT to identify the presence or absence of intra-articular air. Following CT, the wrists were subjected to the SLT to detect the presence of extravasation from the arthrotomy.

Results Nine cadavers were included following baseline CT scan. Following arthrotomy, intra-articular air was visualized in eight of the nine cadavers in the postarthrotomy CT scan. Air was seen in the radiocarpal joint in eight of the nine wrists; midcarpal joint in seven of the nine wrists; and distal radioulnar joint in six of the nine wrists. All wrists (nine of the nine) demonstrated extravasation during the SLT. The mean volume of extravasation occurred at 3.7 mL (standard deviation = 2.6 mL), with a range of 1 to 7 mL.

Conclusion CT scan correctly identified eight of the nine simulated traumatic arthrotomies. Injection of 7 mL during the SLT was necessary to identify 100% of the arthrotomies.

Clinical Relevance CT scan is a sensitive modality for detection of traumatic arthrotomy of the wrist in a cadaveric model.

Keywords

CT scan - open joint - saline load test - traumatic arthrotomy - traumatic wrist arthrotomy

Ethical Approval

The study has been performed in accordance with the ethical standards in the 1964 Declaration of Helsinki.




Publikationsverlauf

Eingereicht: 06. Juli 2021

Angenommen: 10. August 2021

Artikel online veröffentlicht:
01. Oktober 2021

© 2021. Thieme. All rights reserved.

Thieme Medical Publishers, Inc.
333 Seventh Avenue, 18th Floor, New York, NY 10001, USA

 

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