Is continuous catheter adductor canal block better than single-shot canal adductor canal block in primary total knee arthroplasty?: A GRADE analysis of the evidence through a systematic review and meta-analysis

Changjiao Sun, Xiaofei Zhang, Fei Song, Zhe Zhao, Ruiyong Du, Sha Wu, Qi Ma, Xu Cai, Changjiao Sun, Xiaofei Zhang, Fei Song, Zhe Zhao, Ruiyong Du, Sha Wu, Qi Ma, Xu Cai

Abstract

Background: The adductor canal block (ACB) has emerged as an alternative to the femoral nerve block (FNB) after total knee arthroplasty. This meta-analysis was conducted to investigate which ACB method provides better pain relief and functional recovery after total knee arthroplasty METHODS:: We conducted a meta-analysis to identify randomized controlled trials involving single-shot adductor canal block (SACB) and continuous catheter ACB (CACB) after TKA up to December 2019 by searching databases including the PubMed, Web of Science, Embase, Cochrane Controlled Trials Register, Cochrane Library, CBM, CNKI, VIP, and Wanfang databases. Finally, we included 8 randomized controlled trials involving 702 knees in our study. We used Review Manager Software and Grading of Recommendations Assessment, Development, and Evaluation profiler to perform the meta-analysis.

Results: Compared with SACB, CACB can achieve better postoperative pain relief at 24 and 48 h both at rest and after mobilization, lower amount of opioid consumption at 72 h, a shorter length of hospital stay (LOH) and larger range of motion (ROM). In addition, the Timed Up and Go (TUG) test results; quadriceps strength; and incidence of complications, including postoperative nausea and vomiting, DVT, catheter-related infections, catheter dislodgement and neurologic deficits, showed no significant difference between the two ACB methods.

Conclusion: The results of this study demonstrate that CACB is an effective alternative to SACB and can provide better pain relief, a shorter LOH, more degrees of maximum flexion and a lower amount of opioid consumption over time, but it provides a comparable level of recovery of quadriceps strength and mobility with a similar risk of catheter-related complications. Thus, CACB may be a better analgesia strategy than SACB after TKA at present.

Conflict of interest statement

The authors have no conflicts of interest to disclose.

Figures

Figure 1
Figure 1
The search results and selection procedure.
Figure 2
Figure 2
The risk of bias graph of the included studies.
Figure 3
Figure 3
The risk of bias summary: review authors’ judgment of each risk of bias items for each included studies.
Figure 4
Figure 4
A funnel plot of VAS/NRS score within 48 h at rest. CACB = continuous catheter adductor canal block, CI = confidence interval, NRS = numerical rating scale, SACB = single-shot adductor canal block, VAS = visual analog scale.
Figure 5
Figure 5
A funnel plot of VAS/NRS score within 48 h at mobilization. CACB = continuous catheter adductor canal block, CI = confidence interval, NRS = numerical rating scale, SACB = single-shot adductor canal block,VAS = visual analog scale.
Figure 6
Figure 6
A funnel plot of Morphine consumption within 72 h at mobilization. CACB = continuous catheter adductor canal block, CI = confidence interval, SACB = single-shot adductor canal block.
Figure 7
Figure 7
A funnel plot of complications. CACB = continuous catheter adductor canal block, CI = confidence interval, DVT = deep venous thrombosis, SACB = single-shot adductor canal block.
Figure 8
Figure 8
A funnel plot of Quadriceps Muscle Strength. CACB = continuous catheter adductor canal block, CI = confidence interval, MMT = manual muscle test, SACB = single-shot adductor canal block.
Figure 9
Figure 9
A funnel plot of TUG test. CACB = continuous catheter adductor canal block, CI = confidence interval, SACB = single-shot adductor canal block, TUG = test, timed up and go test.
Figure 10
Figure 10
A funnel plot of length of hospital stay. CACB = continuous catheter adductor canal block, CI = confidence interval, SACB = single-shot adductor canal block.
Figure 11
Figure 11
A funnel plot of degrees of maximum flexion. CACB = continuous catheter adductor canal block, CI = confidence interval, SACB ‘= single-shot adductor canal block.

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Source: PubMed

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