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Randomized Controlled Trial
. 2015 Jun;7(2):211-6.
doi: 10.4055/cios.2015.7.2.211. Epub 2015 May 18.

A Randomized Controlled Study to Compare the Total and Hidden Blood Loss in Computer-Assisted Surgery and Conventional Surgical Technique of Total Knee Replacement

Amit Singla  1 , Rajesh Malhotra  1 , Vijay Kumar  1 , Chandra Lekha  2 , G Karthikeyan  3 , Vishwas Malik  4
Affiliations
Randomized Controlled Trial

A Randomized Controlled Study to Compare the Total and Hidden Blood Loss in Computer-Assisted Surgery and Conventional Surgical Technique of Total Knee Replacement

Amit Singla et al. Clin Orthop Surg. 2015 Jun.

Abstract

Background: Total knee arthroplasty (TKA) is associated with considerable blood loss. Computer-assisted surgery (CAS) is different from conventional TKA as it avoids opening the intramedullary canal. Hence, CAS should be associated with less blood loss.

Methods: Fifty-seven patients were randomized into two groups of CAS and conventional TKA. In conventional group intramedullary femoral and extramedullary tibial jigs were used whereas in CAS group imageless navigation system was used. All surgeries were done under tourniquet. Total and hidden blood loss was calculated in both groups and compared.

Results: The mean total blood loss was 980 mL in conventional group and 970 mL in CAS group with median of 1,067 mL (range, 59 to 1,791 mL) in conventional group and 863 mL (range, 111 to 2,032 mL) in CAS group. There was no significant difference in total blood loss between the two groups (p = 0.811). We have found significant hidden blood loss in both techniques, which is 54.8% of the total loss in the conventional technique and 59.5% in the computer-assisted navigation technique.

Conclusions: There is no significant difference in total and hidden blood loss in the TKA in CAS and conventional TKA. However, there is significant hidden blood loss in both techniques. There was no relation of tourniquet time with blood loss.

Keywords: Adverse effects; Arthroplasty, replacement, knee; Blood loss; Computer assisted surgery; Tourniquets.

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Conflict of interest statement

CONFLICT OF INTEREST: No potential conflict of interest relevant to this article was reported.

Figures

Fig. 1
Fig. 1. Consolidated Standards of Reporting Trials (CONSORT) flow chart.
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