Study selection
We identified 373 potentially relevant citations (Figure 1). Following the study selection, six studies were included in the systematic review (34–39). Agreement between reviewers for relevance (k=0.85) and eligibility (k=1) was considered excellent. Ultimately we included three RCTs (36,39,40), two retrospective cohort studies (34,35) and one prospective cohort study (37). All studies were published in English between 2012 and 2020. There was no ongoing study comparing regional to PNB to GA on clinicaltrial.org.
Study characteristics
Study characteristics are summarized in Table 1 and for more details see Supplementary Table 4, Additional File 1. Five studies assessed clinical outcomes of the wrist using infraclavicular block (34,36,37,39,40), and one evaluated the shoulder joint using an interscalene block approach (35). The surgical indication was distal radial fracture fixation (34,36,39,40), proximal humerus fracture fixation (35) and multiples wrist surgery (e.g. carpal tunnel release, wrist mass excision, ganglion cyst excision, metacarpal fracture Open Reduction Internal Fixation (ORIF), fracture correction, hardware removal, arthroscopic surgery and tendon/ligament repair) (37). The lengths of follow-up were, respectively, seven days (37), three months (36), six months (39,40) and twelve months (34,35).
Table 1
Description of studies included in the systematic review
1st author,
Year
|
Study
Design
|
Population
|
Surgery
|
Anesthetic procedure
|
Follow-up duration
|
Clinical Findings
|
N
|
RCT
|
Galos, 2016 (36)
|
Monocenter
|
36
|
Distal radius fracture fixation
|
Group PNB
Type:
Infraclavicular nerve block
Agents:
Lidocaine 2% with 1:200,000 epinephrine (20mL) and
bupivacaine 0.25% (15mL)
If failed:
N/A
|
3 months
|
Functional recovery: DASH, SMFA
No difference between PNB and GA group
ROM:
N/A
Time frame from surgery to return to work:
N/A
Satisfaction regarding the anesthesia technique used:
N/A
Complications:
N/A
|
Group GA
Regimen at the discretion of the anesthesiologist
|
Rundgren, 2019 (39)
|
Monocenter
|
90
|
Distal radius fracture fixation
|
Group PNB
Type:
Supraclavicular nerve block
Agents:
Mepicavaine 1% (2/3 solution) and levobupivacaine 0.25% (1/3 solution)
If failed:
No intention to treat analysis was done
|
6 months
|
Functional recovery: EQ/ED/3L, PWRE
No difference between PNB and GA group
(EQ-ED-3L p=0.7; PRWE p=0.7)
ROM:
NS difference (p=0.7)
Time frame from surgery to return to work:
N/A
Satisfaction regarding the anesthesia technique used:
N/A
Complications:
N/A
|
Group GA
Induction:
Propofol*
Fentanyl*
Maintenance:
Sevoflurane*
Fentanyl*
End of surgery:
Infiltration 10mL levobupicavaine 0.5%
*Dose at the discretion of the anesthesiologist
|
Wong, 2020 (38)
|
Monocenter
|
52
|
Distal radius fracture fixation
|
Group PNB
Type:
Infraclavicular nerve block
Agents:
Lidocaine 2% 10mL with 1:200000 epinephrine and 10mL of ropivacaine 0.75%
If failed:
No intention to treat analysis was done
|
6 months
|
Functional recovery: QuickDASH, PRWE
No difference between PNB and GA group
ROM:
N/A
Time frame from surgery to return to work:
N/A
Satisfaction regarding the anesthesia technique used:
N/A
Complications:
N/A
|
Group GA
Induction:
Fentanyl (0.25-2mcg/kg)
Propofol (1.5-3mg/kg)
Atracurium (0.5mg/kg)
Maintenance:
Sevoflurane (MAC 0.7-1.5)
Morphine (0.025-0.05mg/kg)
End of surgery:
Infiltration levobupicavaine 0.5% 2mg/kg
|
Observational studies
|
Egol, 2012 (34)
|
Retrospective
|
187
|
Distal radius fracture fixation
|
Group PNB
Type:
Infraclavicular nerve block
Agents:
N/A
If failed:
N/A
|
12 months
|
Functional recovery: DASH
No difference between PNB and GA group (p=0.72)
ROM:
PNB is superior to GA group for:
-wrist extension
-wrist flexion
-index finger total active movement
-ring finger distal palmar crease
Time frame from surgery to return to work:
N/A
Satisfaction regarding the anesthesia technique used:
N/A
Complications:
N/A
|
Group GA
Regimen at the discretion of the anesthesiologist
|
Egol 2014(35)
|
Retrospective
|
122
|
Proximal humerus fracture repair
|
Group PNB
Type:
Interscalene Brachial plexus block
Agents:
N/A
If failed:
N/A
|
12 months
|
Functional recovery: DASH
PNB is superior to GA group (p=0.003)
ROM:
PNB is superior to GA group for:
-active forward elevation (p=0.002)
-passive forward elevation (p=0.005)
-external rotation (p=0.002)
Time frame from surgery to return to work:
N/A
Satisfaction regarding the anesthesia technique used:
N/A
Complications:
N/A
|
Group GA
Regimen at the discretion of the anesthesiologist
|
Doo, 2020 (37)
|
Prospective
|
119
|
Fracture correction
Hand ware removal
Arthroscopic surgery
Tendon/ligament repair
Carpal tunnel release
Mass excision
Other
|
Group PNB
Type:
Supraclavicular
Agents:
Lidocaine 1.5% with 1:200,000 epinephrine
If failed:
N/A
|
7 days
|
Functional recovery: Global QoR-40K
No difference between PNB and GA group (p=0.21)
ROM:
N/A
Time frame from surgery to return to work:
N/A
Satisfaction regarding the anesthesia technique used:
N/A
Complications:
N/A
|
Group GA
Induction:
Propofol (1.5-2.5mg/kg)
Rocuronium (0.3-0.8 mg/kg)
Maintenance:
Sevoflurane (1-4%)
Perfusion remifentanil (1.3 mcg/kg)
End of surgery:
N/A
|
Legend:
DASH: Disabilities of the Arm, Shoulder and Hand
EQ-ED-3L : EuroQol-5 Dimensions-3
GA : General Anesthesia
N/A : Not Available
NS : No statistical
ORIF : Open Reduction Internal Fixation
PNB: Peripheral Nerve Block
PO: Postoperative
PWRE: Patient Rated Wrist Evaluation
QoR-40K: Quality of Recovery – 40 Korean
QuickDASH: Quick Disabilities of the Arm, Shoulder and Hand
RCT : Randomized Control Trial
ROM: Range of Motion
SMFA: Short Musculoskeletal Function Assessment
Risk of bias assessment
All RCTs were categorized at high-risk-of-bias for the absence of blinding of the patient and operating staff on the anesthesia technique, PNB vs GA, and absence of blinding of the research team responsible for collection of postoperative and specific outcome data (Table 2) (37,39,40). All observational studies were judged to be at high-risk-of-bias for the absence of matching of exposed and unexposed participants for variables associate with an impact on the outcome of interest, for example the type of surgery (Table 2) (34,35,37). In two studies, there was an unclear risk of bias for assessment on prognostic data since the authors failed to provide information on the staff collecting the data for each outcome and for the follow-up quality since there were a lot of losses to follow-up with plausible impact on the outcome of interest (34,35).
Outcomes
Six studies (N= 563) assessed the functional recovery post upper limb surgery performed under PNB versus GA.
Assessment of functional recovery
The data for assessing functional recovery at the final follow-up were pooled (Figure 2). For observational retrospective studies, functional recovery following upper limb surgery at the final follow-up suggests a superiority of PNB over GA with a small size effect (3 studies, N= 377; SMD -0.35; 95% CI -0.71-0.01; I2=64%; very low confidence). We rated the overall quality of evidence very low because of the high-risk bias aforementioned and for inconsistency and imprecision in the studies included. For RCTs, no significant difference was detected between PNB and GA for the functional recovery (3 studies, N= 160; SMD -0.15; CI at 95% -0.60-0.3; I2=45%; low confidence). The quality of evidence was deemed very low because of imprecision and inconsistency and the presence of multiples bias in the studies. Details on the assessment of the quality of evidence is available in Supplementary Table 4, Additional File 1.
The timeframe for assessing functional recovery at final follow-up was variable among the studies included in the review ranging from seven days to twelve months (34–37,39,40). No differences between anesthetic technique on functional recovery were detected at seven days and three and six months follow-ups after wrist surgery in six studies (34,36,37,39,40). However, Egol et al. showed that for proximal humerus fracture fixation, PNB was superior to GA for functional recovery at twelve months post-surgery (DASH questionnaire (mean)- PNB: 38.6; GA:53.1; p=0.003) (35). Furthermore, in one study, the authors demonstrated that at the follow-up visits preceding the final follow-up, functional recovery following radial distal fracture fixation with PNB was superior to GA (3 months follow-up: DASH questionnaire (mean; Standard Deviation (SD)) – PNB: 18.4 (19.6) vs GA: 26.3 (27.6); p=0.04) (6 months follow-up: DASH questionnaire (mean; SD) – PNB: 10.2 (18.2) vs GA: 17.8 (20.7); p=0.02) (34) Information on the assessment of functional recovery at each time frame for individual studies is available in Supplementary Table 5, Additional File 1.
Psychometric questionnaires
Six different psychometric questionnaires were used to assess functional recuperation post-surgery (41–46). In one study, the QoR-40K questionnaire was used for the postoperative period and found no difference between the anesthesia technique and the recovery at seven days (37). At twelve weeks, one study used both the DASH and SFMA questionnaire and found no difference between PNB and GA with both scores (36). Six months post-surgery, two studies used, respectively, the PRWE and DASH questionnaires the PRWE and EQ-ED-3L questionnaires and failed to identify a difference between the type of anesthesia and the results of the psychometric questionnaires (39,40). At twelve months, two studies assessed functional recovery with the DASH questionnaire and found no difference between PNB and GA groups (34,35). All questionnaires aforementioned have been previously validated (43–48).For more information psychometrics properties of each questionnaire, see Supplementary Table 6, Additional File 1.
Range of Motion
Three RCTs assessed the patient’s range of motion ROM (34,35,39). The timeframe for evaluating ROM at final follow-up was between six months and twelve months (34,35,39). Two studies evaluated the wrist and hand ROM (34,39), and one evaluated the shoulder ROM (35). Due to the difference in the articulation studied (shoulder versus wrist) and the different range of motion measured in each study, data could not be pooled. ROM results are available in Supplementary Table 7, Additional File 1.
Patient Satisfaction
No study assessed satisfaction concerning the anesthesia technique or the time frame between surgery and the return to work.
Adverse Events
Three studies evaluated peripheral nerve block related adverse events. There was no difference of neurological complications associated with the type anesthesia (35,49,50).