Two clinical tests assessing long thoracic nerve function to determine C5 and C6 root graft eligibility in patients with brachial plexus injury

OBJECTIVE Identifying roots available for grafting is of paramount importance prior to reconstructing complex injuries involving the brachial plexus. This is traditionally achieved by combining input from both clinical examinations and imaging studies. In this paper, the authors describe and evaluate two new clinical tests to study long thoracic nerve function and, consequently, to predict the status of the C5 and C6 roots after global brachial plexus injuries. METHODS From March 2020 to December 2020, in 41 patients undergoing brachial plexus repair, preoperative clinical assessments were performed using modified C5 and C6 protraction tests, C5 and C6 Tinel’s signs, and MRI findings to predict whether graft-eligible C5 and C6 roots would be identified intraoperatively. Findings from these three assessments were then combined in a logistic regression model to predict graft eligibility, with overall predictive accuracies calculated as areas under receiver operating characteristic curves. RESULTS In the 41 patients, the pretest probability of C5 root availability for grafting was 85% but increased to 92% with a positive C5 protraction test and to 100% when that finding was combined with a positive C5 Tinel’s sign and favorable MRI findings. The pretest probability of C6 root availability was 40%, which increased to 84% after a positive C6 protraction test and to 93% when the protraction test result concurred with Tinel’s test and MRI findings. CONCLUSIONS Combining observations of the protraction tests with Tinel’s sign and MRI findings accurately predicts C5 and C6 root graft eligibility.

C5-8 neonatal brachial plexus palsy. Operative findings, reconstructive strategy and outcome

From 1998 to 2014, we performed primary brachial plexus repair in 260 children with neonatal brachial plexus palsy. Thirty-three presented with a C5-8 palsy and 24 were reviewed for this study. The surgical strategy was to focus on repairing the upper trunk. Secondary surgical procedures were performed in 21 patients, mainly for shoulder external rotation deficit or weak wrist extension. After a mean follow-up of 9.7 years (range 3 to 19), the median Mallet score for the shoulder was 9.5 and the mean Raimondi score for the hand was 3.3. Median active movement scale was 5, 7 and 5.5 for the deltoid, biceps and triceps, respectively. We conclude that primary C5-8 brachial plexus reconstruction provides restoration of elbow flexion and most patients have a sensitive and functional hand. We also found that secondary surgery to improve shoulder and wrist function is often necessary, which should initially be explained to the family. Level of evidence: IV

Direct Nerve Sutures in (Extended) Upper Obstetric Brachial Plexus Repair

Background In rare, selected cases of severe (extended) upper obstetric brachial plexus palsy (OBPP), after supraclavicular exposure and distal mobilization of the traumatized trunks and careful neuroma excision, we decided to perform direct nerve coaptation with tolerable tension and immobilized the affected arm positioned in adduction and 90-degree elbow flexion for three weeks. Objectives We present our surgical technique and preliminary results in a prospective open patient series, including 22 patients (14 right and 8 left side affected) between 2009 and 2016, operated at a mean age of 8.4 months. Methods Analysis of functional results after a minimum of 18 months was conducted using the British Medical Research Council (BMRC) scale. Results All children reached 60–90° of elbow flexion and 75° of shoulder abduction at already six months after surgery. For those patients having already passed one year post surgery, the mean active shoulder abduction reached 92°, and for those who past the 18 months 124°. We discuss the actual knowledge about nerve coaptation under “reasonable” tension including its advantages and drawbacks. Conclusion This technique may be indicated in preoperatively selected cases of (extended) upper OBPP and may give good functional results.

Brachial plexus injury: are we doing enogh?

Introduction and Objective: Repair of Brachial plexus injury is a neglected art in developing countries like ours. We discuss here various case scenarios managed at our centre and the challenges involved.Materials and Methods: Cases with brachial plexus injury attending our OPD were included in this study. Different neurotisation and repair techniques were used depending on the situations. Outcome in form of improvement in function and relief of pain were evaluated.Results: During last 5 year (July 2010 to September 2015), 100 patients with brachial plexus injury were evaluated in our outpatient OPD. Majority of them were too late to be offered any treatment. 20% patients had neuropraxia and were managed conservatively. 41 patients were operated. 19 were complete brachial plexus injury and underwent extraplexal neurotisation procedures. 11 were partial brachial plexus injury and had intraplexal neurotisation procedures. Neurolysis were done as required. 11 case of peripheral nerve injury was managed with direct repair and neurolysis. Almost all patients with neuropraxia had good recovery in follow up. Patients who underwent surgical intervention had good recovery in terms of recovery recovery of function and relief of pain.Conclusion: Due to lack of awareness and socioeconomic reasons, majority of nepalese people approach very late for surgical options. Benefit of the brachial plexus repair depends upon factors like type of injury, timing of intervention, surgical technique and post operative follow up. We had good outcome in our patients who came early and continued on follow up.