Posttraumatic Brachial Plexus Injuries Research Articles

Correlation of Magnetic Resonance Imaging (Neurography) and Electrodiagnostic Study Findings with Intraoperative Findings in Post Traumatic Brachial Plexus Palsy.

Background The majority of brachial plexus injuries (BPIs) are caused by trauma; most commonly due to two-wheeler road accidents. It is important to determine whether the lesion in question is pre-ganglionic or post-ganglionic for purposes of surgical planning and prognosis. Diagnostic testing helps the surgeon to not only decide whether surgical intervention is required, but also in planning the procedure, thereby maximizing the patient's chances of early return to function. The aim of the study was to determine the diagnostic efficacy of electrodiagnostic studies (Edx) and magnetic resonance imaging (MRI) individually, and in unison, in detecting the type and site of BPI by comparison with intraoperative findings (which were used as the reference standard) in patients with posttraumatic BPI. Methods It is an observational cross-sectional prospective randomized study, wherein 48 patients with BPI underwent a detailed clinical and neurological examination of the upper limb, Edx, MRI neurography and were subsequently operated upon. We assessed a total of 240 roots. The diagnosis of all spinal roots was noted on Edx. MRI was performed to look for root avulsion, pseudomeningocoele, and/or rupture injury. The patients were subsequently operated upon. All roots were traced from infraclavicular level right up to the foramen to ensure continuity of root or note rupture/ avulsion. The findings were tabulated. Results MRI accurately diagnosed 138 of the 147 injured roots and MRI sensitivity for the detection of BPI was 93.88%, whereas Edx correctly identified 146 out of 147 injured roots and thus, had sensitivity of 99.32%; however, both lacked specificity (18.28 and 20.43%, respectively). With Edx and MRI in unison, sensitivity was 100% which meant that if a given patient with a BPI is subjected to both tests, not a single abnormal root will go unnoticed. Conclusion Edx and MRI are two highly sensitive investigation modalities whose combined sensitivity is 100% for the detection of a root injury. Therefore, we recommend both tests as they are excellent screening tests.

Functional Evaluation of Levator Scapulae Tendon to Supraspinatus in Adult Brachial Plexus Injuries.

Introduction Brachial plexus injuries are severe life-altering injuries. The surgical method to restore shoulder abduction in adult upper brachial plexus injuries involves the usage of nerve grafts and nerve transfers targeting the suprascapular and/or the axillary nerve. When the primary nerve surgery has been unsuccessful or recovery has been incomplete or with a late presentation, muscle transfer procedures are needed to provide or improve shoulder abduction. Levator scapulae to supraspinatus is a transfer to improve shoulder abduction in posttraumatic brachial plexus injuries. Material and Methods The study included 13 patients with the age ranging from 17 to 47 years with a mean age of 30 years. All these patients had preop shoulder abduction of Medical Research Council (MRC) grade ≤3. All had a minimum of MRC grade 4 of active elbow flexion. Eleven patients had primary surgery. Only patients with a minimum of 1 year postoperative follow-up were included. All 13 patients underwent levator scapulae transfer only. Results All patients had a stable shoulder postoperatively. The average increase in active shoulder abduction was from 6.15°(median: 0°) preoperatively to 61.92°(median: 60°), with an average gain in shoulder abduction of 49.61°(median: 50°). Conclusions Transfer of levator scapulae tendon to the supraspinatus is an option to improve shoulder abduction in posttraumatic brachial plexus. In conditions where supraspinatus alone is not functioning, levator scapulae is the best available transfer, considering its strength and maintaining the form of the shoulder unlike trapezius transfer. In patients with previous surgery where supraspinatus has recovered partially but not functionally significant, this tendon transfer can be considered for the augmentation of the existing shoulder abduction.

The Effect of Age and the Delay before Surgery on the Outcomes of Intercostal Nerve Transfers to the Musculocutaneous Nerve: A Retrospective Study of 232 Cases of Posttraumatic Total and Near-total Brachial Plexus Injuries.

Introduction Posttraumatic brachial plexus injuries are devastating, as the brain and spinal cord are disconnected from the upper limb. Restoration of elbow flexion has been widely recognized as the primary objective of nerve reconstruction. In the absence of utilizable (ruptured) root stumps in the neck, one has recourse only to nerve transfers. The direct transfer of intercostal nerves to the musculocutaneous nerve is one of the techniques that has been commonly employed over the past four decades. However, the outcomes of this procedure cited in the literature have varied considerably. The patient’s age and the delay from the accident to surgery have been known to affect the results of nerve reconstruction operations. The authors present a study of the effect of these parameters on intercostal nerve transfers. Methods The data of 232 patients with total and near-total brachial plexus injuries treated by the senior author between April 1995 and December 2015 was examined. Intercostal nerve transfers were used for the restoration of biceps function in each of these patients. The outcomes were tabulated, and the correlation with the age and the delay before surgery was examined. Results The strength of the biceps regained was better in patients younger than 30 years old and those operated upon earlier than 6 months from the accident. The differences in outcomes were found to be statistically significant ( p = 0.001 for preoperative delay and p < 0.005 for the patient’s age). Conclusion The results give clear proof of the significant effect of the age and preoperative delay on the outcomes of intercostal nerve transfers for restoration of biceps function. These findings can serve as pointers to help the surgeon in choosing the method of nerve reconstruction in a given case.

Axillary nerve neurotization by a triceps motor branch: comparison between axillary and posterior arm approaches

ObjectivesThis study is aimed at comparing the functional outcome of axillary nerve neurotization by a triceps motor branch through the axillary approach and posterior arm approach. MethodsThe study included 27 patients with post-traumatic brachial plexus injury treated with axillary nerve neurotization by a triceps motor branch for functional recovery of shoulder abduction and external rotation. The patients were retrospectively evaluated and two groups were identified, one with 13 patients undergoing axillary nerve neurotization by an axillary approach and the second with 14 patients using the posterior arm approach. Patients underwent assessment of muscle strength using the scale recommended by the British Medical Research Council, preoperatively and 18 months postoperatively, with useful function recovery considered as grade M3 or greater. ResultsIn the axillary approach group, 76.9% of patients achieved useful abduction function recovery and 69.2% achieved useful external rotation function recovery. In the group with posterior arm approach, 71.4% of patients achieved useful abduction function recovery and 50% achieved useful external rotation function recovery. The difference between the two groups was not statistically significant (p=1.000 for the British Medical Research Council abduction scale and p=0.440 for external rotation). ConclusionAccording to the British Medical Research Council grading, axillary nerve neurotization with a triceps motor branch using axillary approach or posterior arm approach shows no statistical differences.

Prevalence of rotator cuff tears in adults with traumatic brachial plexus injuries.

Restoration of shoulder function is a primary goal when treating patients with traumatic brachial plexus injury. A concomitant rotator cuff tear may alter the treatment approach and prognosis for these individuals. The purpose of this study was to define the prevalence of rotator cuff tears in patients with traumatic brachial plexus injuries. This is a retrospective review of 280 adult patients with traumatic brachial plexus injury treated at a single institution over a twelve-year period. An upper-extremity magnetic resonance imaging (MRI) scan was acquired for all patients as part of the initial evaluation for posttraumatic brachial plexus injury. The radiographic and clinical data on these patients were reviewed to document partial or full-thickness rotator cuff tears, mechanism and location of the brachial plexus injury, and age. Twenty-three patients (8.2%) had a full-thickness rotator cuff tear: one patient had tears involving three tendons, eight patients had tears involving two tendons, twelve patients had a single-tendon tear, one patient had a single-tendon tear in each shoulder, and one patient had a single-tendon tear in one shoulder and a two-tendon tear in the other. Twenty-one tears involved the supraspinatus, eight involved the infraspinatus, and seven involved the subscapularis. Thirteen patients underwent surgical repair of the rotator cuff. The average age of the patients in this cohort was 33.4 years, and older age was associated with an increased risk of full-thickness rotator cuff tears (odds ratio [OR], 1.06 per year). Patients with infraclavicular brachial plexus injury had a significantly higher rate of full-thickness rotator cuff tears. Concomitant rotator cuff tears are present in approximately one in ten patients with traumatic brachial plexus injury. These injuries may contribute to shoulder dysfunction; therefore, evaluation of the rotator cuff with imaging studies is appropriate when formulating treatment strategies. Prognostic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Microsurgical outcome in posttraumatic brachial plexus injuries in children

The purpose of the study was to analyze the surgical outcomes in children (≤18 years) with brachial plexus injury operated between April 2008 and March 2012 at our center. All children <18 years of age admitted to our center and surgically treated with a diagnosis of posttraumatic brachial plexus injury were included in the study. The demographic details of these patients were retrieved from the computerized database of our hospital. The results were analyzed in terms of the mode of injury, type of injury, surgical procedure performed, and motor recovery after the surgery (MRC Grading). Motor recovery with MRC >3/5 was termed as good outcome. A total of 33 patients were surgically treated. The mean age at presentation was 15.1 (range 4-18) years. Boys constituted 79% (n = 26) of our patient population. High-velocity injury was the commonest mode of injury. Panbrachial injury was the commonest seen in 82% (n = 27) of patients. Mean duration between injury and surgical intervention was 6 (range 2-13, SD ± 2.6) months. Majority of patients underwent neurotization procedure. Mean follow-up was 32 (range 6-51) months. High-velocity trauma is the most common mode on injury. Global palsy involving all the plexal elements was present in 82% of the children. Neurotization was the most commonly performed surgical procedure. Good motor outcome (MRC grade ≥3/5) was seen in 62% of patients.

Brachial plexus injury in adults: Diagnosis and surgical treatment strategies.

Adult post traumatic Brachial plexus injury is unfortunately a rather common injury in young adults. In India the most common scenario is of a young man injured in a motorcycle accident. Exact incidence figures are not available but of the injuries presenting to us about 90% invole the above combination This article reviews peer-reviewed publications including clinical papers, review articles and Meta analysis of the subject. In addition, the authors′ experience of several hundred cases over the last 15 years has been added and has influenced the ultimate text. Results have been discussed and analysed to get an idea of factors influencing final recovery. It appears that time from injury and number of roots involved are most crucial.

Brachial Plexus Injuries in Adults: Management and Repair Strategies in our Experience. Results from the Analysis of 428 Supraclavicular Palsies

Background: Brachial plexus palsies are often devastating injuries leading to severe functional impairment of the upper limb. Their surgical management has greatly changed in the last 30 years and it is still evolving but nowadays the key role of surgery in reversing the destiny of many of these patients is clearly recognized.The Authors are presenting their guidelines of management and repair strategy in the surgical treatment of these injuries. Method: 578 post-traumatic brachial plexus injuries in adults were operated in 23 years: 428 supraclavicular and 150 infraclavicular lesions. A retrospective analysis of the surgical strategies applied in supraclavicular injuries and their outcome has been performed. A follow up of at least two years is available in 303 patients. Results: In upper brachial plexus injuries, surgery restored good shoulder and elbow function in more than 90% of cases, regardless the presence of avulsions. Total palsies still retaining some hand function (due to one lower root in continuity with the spine) also received remarkable benefit in about 60% of cases. Shoulder and elbow function were recovered in 40% of complete injuries with multiple avulsions. Conclusions: Advances in preoperative imaging techniques, electrodiagnostic studies and reconstructive surgery have made possible to provide remarkable functional improvement in brachial plexus injuries. Early diagnostic assessment, correct timing of surgery and appropriate rehabilitation are crucial to obtain a rewarding outcome.

Management strategy in post traumatic brachial plexus injuries

BackgroundTraumatic brachial plexus injury is a devastating condition resulting mainly from motor cycle accidents and primarily affecting the young adults. In the past there was a pessimistic attitude in the management of these injuries. However in last two decades with the introduction of microsurgical techniques and advances in imaging modalities, these injuries are being explored and repaired early with satisfactory to good functional out comes. MethodsNeurolysis, nerve repair, nerve grafting, nerve transfer, pedicle muscle transfer and functioning free-muscle transfer are the main surgical procedures in the management of brachial plexus injury. In the management of these injuries an immediate intervention is considered in penetrating trauma. All other common high velocity traction injuries are initially observed for a spontaneous recovery. If there are no signs of recovery by three months, surgery is indicated, as further delay will affect the ultimate results. In global brachial plexus palsy with all root avulsions, intervention is even earlier, as chances of spontaneous recovery are practically nil. ResultsGood results are expected with early intervention in upper plexal lesions. Results are favorable with short nerve grafts, distal nerve transfers, and intraplexal neurotization. The aim in global brachial plexus palsy is to restore the elbow flexion and provide a stable shoulder. Restoration of a fully functional and sensate hand is still far from being a reality. ConclusionThe management of brachial plexus injury remains a challenging problem. Functional results have considerably improved in the past two decades with the incorporation of microsurgical techniques in nerve surgery, and advancements in anesthesia. Following microsurgical reconstruction many of these patients are expected to return to their original work and amputation is no longer considered a treatment option.

Hemi-Contralateral C7 Transfer in Traumatic Brachial Plexus Injuries: Outcomes and Complications

In brachial plexus injuries with nerve root avulsions, the options for nerve reconstruction are limited. In select situations, half or all of the contralateral C7 (CC7) nerve root can be transferred to the injured side for brachial plexus reconstruction. Although encouraging results have been reported, CC7 transfer has not gained universal popularity. The purpose of this study was to critically evaluate hemi-CC7 transfer for restoration of shoulder function or median nerve function in patients with severe brachial plexus injury. A retrospective review of all patients with traumatic brachial plexus injury who had undergone hemi-CC7 transfer at a single institution during an eight-year period was performed. Complications were evaluated in all patients regardless of the duration of follow-up. The results of electrodiagnostic studies and modified British Medical Research Council (BMRC) motor grading were reviewed in all patients with more than twenty-seven months of follow-up. Fifty-five patients with traumatic brachial plexus injury underwent hemi-CC7 transfer performed between 2001 and 2008 for restoration of shoulder function or median nerve function. Thirteen patients who underwent hemi-CC7 transfer to the shoulder and fifteen patients who underwent hemi-CC7 transfer to the median nerve had more than twenty-seven months of follow-up. Twelve of the thirteen patients in the shoulder group demonstrated electromyographic evidence of reinnervation, but only three patients achieved M3 or greater shoulder abduction motor function. Three of the fifteen patients in the median nerve group demonstrated electromyographic evidence of reinnervation, but none developed M3 or greater composite grip. All patients experienced donor-side sensory or motor changes; these were typically mild and transient, but one patient sustained severe, permanent donor-side motor and sensory losses. The outcomes of hemi-CC7 transfer for restoration of shoulder motor function or median nerve function following posttraumatic brachial plexus injury do not justify the risk of donor-site morbidity, which includes possible permanent motor and sensory losses.

Early post operative results after repair of traumatic brachial plexus palsy

Treatment options for traumatic brachial plexus injuries include nerve grafting, or neurotization. The type of lesion and the reconstructive procedures affect functional results and postoperative pain relief. A total number of twenty five patients suffering from post-traumatic brachial plexus injury were included in the study. The patients underwent exploration and primary repair of the affected plexus, based on case by case policy. Spinal accessory nerve transfer to suprascapular nerve procedure regained 78.95% of functional muscle power, 10.50% of non functional muscle power and only 10.5 % of non innervated muscle. The Oberlin procedure regained 83.33% with elbow flexion muscle power, 16.67% with non functional muscle power. Intercostal nerve transfer to musculocutaneous nerve regained 62.5% with functional muscle power, 25% with non functional muscle power and only 12.5 % with non innervated muscle. The shoulder, elbow and wrist extension functions were significantly improved early post-operatively. In addition, the post-operative improvement of shoulder, elbow and wrist extension functions had significant negative correlations with the pre-operative elapsed time, and accompanied by a significant positive correlation with post-operative follow up period. Early intervention for traumatic brachial plexus palsy is recommended to get good results with pain relief.

Selective Contralateral C7 Transfer in Posttraumatic Brachial Plexus Injuries: A Report of 56 Cases

Large experience in Asia has shown that the contralateral C7 nerve transfer has proved one of the major treatments for brachial plexus root avulsions. The authors report their experience in North America using the selective contralateral C7 transfer for neurotization of multiple targets. A retrospective review of 56 patients with posttraumatic root avulsion brachial plexus injuries who underwent contralateral C7 transfer using selective technique was conducted. The targets included the axillary, musculocutaneous, radial, and median nerves. Additionally, neurotization of future free muscle transplantation was performed. The mean follow-up period was 6.1 years (range, 2.5 to 14 years). Motor recovery reached a level of M3+ or greater in 20 percent (two of 10) of patients for the deltoid, 52 percent (12 of 23) for the biceps, 24 percent (five of 21) for the triceps, 34 percent (10 of 29) for the wrist and finger flexors, and 20 percent (two of 10) for the wrist and finger extensors. In addition, sensory recovery of S2 or greater was achieved in 76 percent (22 of 29) of patients with median nerve neurotization. As far as the postoperative morbidity of the donor limb, by 6 months, there was no discernible motor or sensory deficit. Patients with a surgical delay of 9 months or less and patients aged 18 years or younger achieved significantly better results. Brachial plexus root avulsions, long considered to be irreparable, are by no means unreconstructable. The selective contralateral C7 transfer appears to be a safe procedure, and it can be successfully applied for simultaneous reconstruction of several different nerves and/or for neurotization of future free muscle transfers.

Modified trapezius transfer technique for restoration of shoulder abduction in brachial plexus injury

Aims and Objectives: Shoulder stability and restoration are very important in providing greater range of motion to the arm and forearm. When brachial plexus repair does not have the desired outcome and in patients with long standing denervation, the trapezius muscle is frequently used for transfer to restore the shoulder abduction and external rotation. We propose a modified simple technique for trapezius muscle transfer. Materials and Methods: From February 2004 to February 2006, eight patients with posttraumatic brachial plexus injury with insufficient shoulder abduction were treated by trapezius muscle transfer. All patients with brachial plexus palsy were posttraumatic, often resulted from motor cycle accidents. Before operation a full evaluation of muscle function in the affected arm was carried out. All patients were treated with trapezius muscle transfer performed by the modified technique. S-shaped incision from the anterior border of the trapezius just above the clavicle to the Deltoid up to its insertion was made. The accessory nerve and its branches to the trapezius were secured. The trapezius was dissected and detached from its insertion along with the periosteum and sutured to the insertion of the Deltoid muscle. Results: All patients had improved functions and were satisfied with the outcome. The average increase in active abduction of shoulder was from 13.7 degrees (0 to 35 degrees) preoperatively to 116 degrees (45 to 180 degrees) postoperatively and of shoulder flexion from 24.3 degrees (15 to 30 degrees) to 107 degrees (90 to 180 degrees). Conclusion: The modified technique proposed here for trapezius transfer is safe, convenient, simple and reliable for restoration of shoulder abduction and stability with clear subjective benefits.

Options and Results in Nerve Reconstruction of Elbow Flexion in Patients with Post-Traumatic Brachial Plexus Injury

If active elbow flexion must be reconstructed in brachial plexus lesions, the option of nerve reconstruction should always be considered first. Depending on the etiology, there are several possibilities for re-neurotization of the musculocutaneous nerve, such as intraplexual reconstruction from the C6 root, or extraplexual reconstruction from the accessory nerve, phrenic nerve, intercostal nerves, ulnar nerve, pectoral nerve, and contralateral C7 root.

Combined Glenohumeral Arthrodesis and Above-Elbow Amputation for the Flail Limb Following a Complete Posttraumatic Brachial Plexus Injury

The treatment of a severe traction injury resulting in complete, posttraumatic brachial plexus palsy remains a daunting challenge to the upper extremity surgeon. Operative intervention must address painful glenohumeral instability while optimizing functional rehabilitation. Glenohumeral arthrodesis has been shown to reliably alleviate pain from shoulder instability and place the extremity in a functional position for activities of daily living. An above the elbow amputation has also been advocated to remove the flail insensate extremity and create a stable stump for prosthetic training and rehabilitation. We describe the technique of a combined glenohumeral arthrodesis and above elbow amputation to address the flail insensate limb following a severe posttraumatic brachial plexus injury. In our clinical experience, the combination of procedures results in an improved pain level, enhances shoulder stability, encourages functional rehabilitation via prosthetic fitting, and is associated with high patient satisfaction.

Shoulder arthrodesis.

Current indications for shoulder arthrodesis include posttraumatic brachial plexus injuries, paralysis of the deltoid muscle and rotator cuff, chronic infection, failed revision arthroplasty, severe refractory instability, and bone deficiency following resection of a tumor in the proximal aspect of the humerus. The trapezius, levator scapulae, serratus anterior, and rhomboid muscles must be functional to optimize the functional result following shoulder arthrodesis. A consensus has not been reached concerning the ideal position of the shoulder arthrodesis, although excessive abduction or flexion has been associated with chronic postoperative pain. Decortication of both the acromiohumeral and the glenohumeral surfaces to increase the surface area available for arthrodesis is the most common means for obtaining successful fusion. Although there are numerous methods for stabilization of a shoulder arthrodesis, the most popular method today is probably the AO technique with either a single plate or double plates.

Occurrence and Treatment of Pain After Brachial Plexus Injury

The occurrence of pain was investigated in 118 patients with posttraumatic brachial plexus injuries (BPI). Ninety-five patients were operated upon by the same surgeon. Three to 14 years after BPI and reconstructive surgery, 91% of the patients experienced permanent pain that was severe in 40% and mild in 51% of cases. When early reconstructive surgery was successful, a significant decrease in pain occurred more frequently. For 57% of patients with pain, a plurimodal medical treatment with tricyclic antidepressants, antiepileptic drugs, and behavioral therapy efficiently reduced pain. For the patients with unbearable paroxystic pain, when medical treatment failed, the destruction of deafferented dorsal horns at the level of avulsion (Nashold procedure) could produce pain relief. In all cases psychosocial management produced early rehabilitation.

Imaging of Posttraumatic Brachial Plexus Injury

After reviewing a series of 220 patients operated upon between 1975 and 1985 for traumatic brachial plexus injuries, the authors present the results of 103 myelographies, 48 computed tomographies (CT scans) combined with standard myelography, and 25 series of images obtained by magnetic resonance imaging (MRI). To evaluate precisely the type and level of injury, the accuracy of these three techniques was compared with clinical and operative findings. The accuracy of myelography was considered good in 84% of the cases, but 4% were evaluated as false positive results and 12% as false negative or doubtful results. The combined CT scan and myelography reduced the number of doubtful results and accuracy reached 94.25%, but they did not visualize the roots distal to the spinal foramina. MRI correlated well with CT scan images and, in addition, offered visualization of distal radicular injuries. MRI seems a promising diagnostic procedure and should also help to situate nerve grafts and check their viability.