The management of radial nerve palsy associated with fractures of the shaft of the humerus has been disputed for several decades. This study has systematically reviewed the published evidence and developed an algorithm to guide management. We searched web-based databases for studies published in the past 40 years and identified further pages through manual searches of the bibliography in papers identified electronically. Of 391 papers identified initially, encompassing a total of 1045 patients with radial nerve palsy, 35 papers met all our criteria for eligibility. Meticulous extraction of the data was carried out according to a preset protocol. The overall prevalence of radial nerve palsy after fracture of the shaft of the humerus in 21 papers was 11.8% (532 palsies in 4517 fractures). Fractures of the middle and middle-distal parts of the shaft had a significantly higher association with radial nerve palsy than those in other parts. Transverse and spiral fractures were more likely to be associated with radial nerve palsy than oblique and comminuted patterns of fracture (p < 0.001). The overall rate of recovery was 88.1% (921 of 1045), with spontaneous recovery reaching 70.7% (411 of 581) in patients treated conservatively. There was no significant difference in the final results when comparing groups which were initially managed expectantly with those explored early, suggesting that the initial expectant treatment did not affect the extent of nerve recovery adversely and would avoid many unnecessary operations. A treatment algorithm for the management of radial nerve palsy associated with fracture of the shaft of the humerus is recommended by the authors

We describe a lateral approach to the distal humerus based on initial location of the superficial branches of the radial nerve, the inferior lateral cutaneous nerve of the arm and the posterior cutaneous nerve of the forearm. In 18 upper limbs the superficial branches of the radial nerve were located in the subcutaneous tissue between the triceps and brachioradialis muscles and dissected proximally to their origin from the radial nerve, exposing the shaft of the humerus. The inferior lateral cutaneous nerve of the arm arose from the radial nerve at the lower part of the spiral groove, at a mean of 14.2 cm proximal to the lateral epicondyle. The posterior cutaneous nerve of the forearm arose from the inferior lateral cutaneous nerve at a mean of 6.9 cm (6.0 to 8.1) proximal to the lateral epicondyle and descended vertically along the dorsal aspect of the forearm. The size and constant site of emergence between the triceps and brachioradialis muscles constitute a readily identifiable landmark to explore the radial nerve and expose the humeral shaft

Introduction The radial nerve is at risk in arthroscopic elbow surgery and there are reports of significant nerve injury, particularly with arthroscopic synovectomy or arthroscopic capsulectomy for the stiff elbow. This study was aimed to further define the relationship of the radial nerve to the elbow joint. Methods Magnetic Resonance Imaging studies of 23 elbows with minimal or no pathology were used to measure the distance of the radial nerve from the border of the radial head and the position of the nerve relative to the bony landmarks of the elbow joint. Results The radial nerve or its branches were found to lie on average 6.6 mm from the border of the radial head (range 3 to 9 mm) and in an arc of 64° antero-lateral to the radial head. At the level of the radial head the nerve was not separated from capsule by muscle in 12 of the 23 elbows. Conclusions Care should be taken in the insertion of antero-lateral portals in elbow arthroscopy as the position of the radial nerve and its branches is variable. Arthroscopic synovectomy and capsulectomy should be carried out above the level of the radial head where the nerve is protected by brachialis to avoid permanent damage to the radial nerve

A radial nerve palsy complicates 1.8 to 17% (mean 11%) diaphyseal humeral fractures (13.7% in our series of 156 humeral fractures and nonunions treated by external fixation – Tsiagadigui, 2000). In about 75%, it is a primary lesion, related to the fracture before any attempt at treatment. In 60%, the fracture, most commonly with an oblique fracture line, involves the middle third. In children, a supracondylar fracture may be complicated by radial nerve palsy. Most nerve lesions correspond to neurapraxia or axonotmesis, due to traction or compression associated with bone angular deformity. Unfrequently, the nerve is impaled or severed by bone fragments, or may be trapped within the fracture in case of a spiral oblique middle or distal third humeral fracture with lateral displacement of the distal fragment. Iatrogenic injury during internal fixation or entrapment within periosteal callus are occasionally observed. The classical indications for early radial nerve exploration include open fractures requiring surgical debridement, or fractures with vascular compromise, or when the osteosynthesis is done by a plate. In all other cases, we recommend to investigate the integrity of the radial nerve by echography. In the absence of discontinuity, spontaneous neurological recovery is likely to occur and is monitored clinically and by electromyography; prevention of joint contracture is done by physiotherapy and by a wrist splint, maintaining the joint in slight dorsiflexion. In case of persistent palsy, neurolysis is indicated several months after the initial injury, the precise delay depending on the level of the fracture. Palliative treatment by tendon transfers offers in cases of persistent palsy excellent functional results. Tendon transfers may be indicated early after the fracture, in case of an irreparable radial nerve lesion

Objective: The primary aim was to describe the epidemiology of the Holstein-Lewis humeral shaft fracture, its association with radial nerve palsy and the outcome regarding recovery from the radial nerve palsy and fracture healing. The secondary aim was to analyze the long-term functional outcome. Setting: Six major hospitals in Stockholm County. Design: Descriptive study. Retrospective assessment of radial nerve recovery and fracture healing. Prospective assessment of functional outcome. Patients: All 27 patients with a 12A1.3 humeral shaft fracture according to the OTA classification satisfying the criteria of a Holstein-Lewis fracture in a population of 358 consecutive patients with 361 traumatic humeral shaft fractures. Intervention: Nonoperative or operative treatment according to the decision of the attending orthopedic surgeon. Main Outcome Measurements: Recovery of the radial nerve, fracture healing and functional outcome according to the Short Musculoskeletal Function Assessment (SMFA). Results: The Holstein-Lewis humeral shaft fracture constituted 7.5% of all humeral shaft fractures and was associated with an increased risk of acute radial nerve palsy compared to other types of humeral shaft fractures, 22% versus 8% (p< 0.05). The fractures of six of the seven operatively treated patients healed after the primary surgical procedure while one fracture healed after revision surgery. The fractures of all patients treated nonoperatively healed without any further intervention. All six radial nerve palsies (two patients treated nonoperatively and four operatively) recovered. The functional outcome according to the SMFA was good with no differences between the nonoperatively and operatively treated patients: SMFA dysfunction index 7.6 and 9.7, respectively, and SMFA bother index 6.1 and 6.8, respectively. Conclusion: The Holstein-Lewis humeral shaft fracture was associated with a significantly increased risk of acute radial nerve palsy. The overall outcome regarding fracture healing, radial nerve recovery, and function is excellent regardless of the primary treatment modality, i.e. operative or nonoperative treatment. The indication for primary operative intervention in this fracture type appears to be relative

Thermal injury to the radial nerve caused by cement leakage is a rare complication after revision elbow arthroplasty. Several reports have described nerve palsy caused by cement leakage after hip arthroplasty. However, little information is available regarding whether radial nerve injury due to cement leakage after humeral stem revision will recover. In a recent study, radial nerve palsy occurred in 2 of 7 patients who had thermal injury from leaked cement during humeral component revisions. These patients did not regain function of the radial nerve after observation. We present a case of functional recovery from a radial nerve palsy caused by cement leakage after immediate nerve decompression in revision elbow arthroplasty[Fig. 1.2]

At operation for the correction of cubitus varus by removal of a wedge based laterally, the radial nerve fortunately was first explored and found to run through a transverse bony tunnel at the posterior level of a supracondylar fracture sustained eight years previously. After elevation of the bony tunnel and nerve en bloc the osteotomy was completed; neurapraxia of the radial nerve soon recovered. With hindsight, the entrance and exit foramina of the tunnel could be clearly seen in the antero-posterior radiograph taken before the operation

Fractures of the distal third of the humerus may be complicated by complete lesions of the radial nerve which may be entrapped or compressed by bone fragments. Indirect reduction and internal fixation may result in a permanent nerve lesion. We describe the treatment of these lesions by insertion of a bridge plate using the minimally-invasive percutaneous technique. Six patients were operated on and showed complete functional recovery. Healing of the fractures occurred at a mean of 2.7 months (2 to 3) and complete neurological recovery by a mean of 2.3 months (1 to 5). In one patient infection occurred which resolved after removal of the implant

Purpose: The radial nerve raises several problems during plate fixation of the mid third of the humerus because of its particular anatomic position. Translocation of the radial nerve has been proposed to distend the nerve. There have been few studies studying the feasibility of translocation. The purpose of our work was to validate the translocation effect on nerve distension and the status of the translocated radial nerve branches. Materials and methods: We report an anatomic study of six cases. These patients had recent communitive fractures of the mid third of the humerus with immediate radial paralysis in three cases. The anterolateral approach was used to expose the nerves that were found to be continuous. Nerve translocation then plate fixation were achieved without neurolysis. The anatomic study was conducted on 15 cadavers: the distance between the last branch for the triceps and the first epicondylar motor branch was calculated in three positions: D0: mean distance in the anatomic position of the nerve; D1: mean distance of the nerve in the anatomic position with the plate; D2: mean distance after anterior translocation of the nerve. We provoked shaft fractures in the mid and lower third of the humerus and evaluated the sensorial and motor branches after translocation. Results: In this clinical series, translocation was easily achieved in all cases without stretching the sensorial or motor branches. The three radial paralyses recovered in six months. There was not postoperative paralysis for the other cases. For the anatomy study, mean measurements for D0, D1, and D2 were 112, 116 and 106 mm, for a 10 mm gain between D2 and D1. The sensorial branch was stretched making the technique difficult in one case. Discussion: The results of these two studies confirm the effect of radial nerve distension that facilitates fixation. It frees the posterior aspect of the humerus allowing access in case of nonunion. However, the translocation should be done without neurolysis of the radial nerve and after informed consent from the patient. Conclusion: Anteromedial translocation of the radial nerve appears to be useful for fractures of the humerus. The ideal indication is an oblique fracture of the mid or lower third of the humeral shaft with immediate radial palsy. A certain degree of comminution facilitates the translocation

Among the most popular techniques for the management of radial nerve palsy is the transfer of the Pronator Teres (PT) to the Extensor Carpi Radialis Brevis (ECRB), of the Flexor Carpi Radialis (FCR) to the Extensor Digitorum Communis (EDC) and of the Palmaris Longus (PL) to rerouted Extensor Pollicis Longus (EPL). This retrospective study was undertaken to assess the outcome of flexor carpi radialis transfer in the treatment of radial nerve palsy. Twenty patients with a mean age of 36 years were included in this study. Surgical management, as described above, was decided since all patients had irreparable damage to the nerve. Parameters that were assessed included range of wrist motion, dynamic power of wrist flexion and extension, and radial and ulnar deviation and function. The average follow-up was 4.5 years. Compared to a control group of 10 volunteers of similar characteristics, all patients achieved a functional range of motion and satisfactory power of wrist motion. All patients returned to their previous occupation. Transfer of Flexor Carpi Radialis tendon for irreparable radial nerve palsy yields satisfactory results. Therefore, it can be expected that patients will obtain a functional range of motion as well as an adequate strength of motion

Aim: The aim of the study is to present our experience in the treatment of radial nerve palsy due to humeral fracture. Material and methods: During the last 4 years, we treated 10 patients with humeral fractures associated with radial nerve palsy. Seven patients were men and 3 were women (mean age 47.8 yrs, range 29–68 yrs). All fractures were closed. Three fractures were transverse, 4 were oblique and 3 were comminuted. Nerve palsy was present at admission in 8 cases while in 2 cases it appeared after closed reduction manipulations. The latter was considered as an indication for early surgical exploration. Three out of the rest 8 patients were explored because the fracture was comminuted. The remaining five patients were treated initially conservatively. In 3 of them closed reduction failed and the patients were also operated. In total, 2 of the patients were treated with closed reduction. Results: All fractures were united. During exploration no serious injury was found. All patients had complete return of nerve function within 8 months. Conclusions: Because no serious injury of the nerve was found during exploration and recovery was complete, surgical treatment could have been avoided. Conservative treatment should be the initial treatment of choice

The management of closed fractures of the humerus with an associated nerve palsy remains controversial. With very little written about this injury in children, we present the case of a three-year-old child with a closed humeral shaft fracture in whom surgical exploration and reconstruction of the radial nerve with a sural nerve graft was performed three months after injury. The child regained full function. To the best of our knowledge, this is the first such case to be reported in the English literature

1. A modified technique of tendon transference for irreparable damage of the radial nerve is described. The tendon of the pronator teres is transferred to the two radial extensors of the wrist and to the tendon of extensor carpi ulnaris. 2. The method succeeds in preventing radial deviation on attempted dorsiflexion of wrist and helps to provide a powerful grip

Purpose: Radial paralysis is a major complication of humeral shaft fractures. In most cases, the paralysis is regressive but in certain patients surgical repair is required to achieve full neurological recovery. We reviewed retrospectively our patients to determine the causes of non-recovery and evaluate the efficacy of different treatments. Material and methods: Thirty patients were operated between 1990 and 1997 for radial nerve paralysis that was observed immediately after trauma or developed secondarily. Mean follow-up after surgery was 6.3 years. There were 22 men and 8 women, 16 right side and 14 left side. Mean delay from injury to surgery was four months (0–730 days). Elements that could be involved in radial paralysis were noted: type of fracture, level of the fracture, treatment, approach, material used. There were ten cases with non-union. Neurological recovery at three years was assessed with muscle tests and with the Alnot criteria. An electrical recording was also made in certain patients. Surgery involved neurolysis in 23 cases, nerve grafts in five and tendon transfers in two. Results: Outcome was very good and good in 22 patients, good in one and could not be evaluated in one (tendon transfer). There were three failures (two neurolysis and one graft) and two patients were lost to follow-up. After neurolysis, mean delay to recovery was seven months; it was 15 months after nerve grafts. Recovery always occurred proximally to distally. Discussion: Radial paralysis after femoral shaft fracture regresses spontaneously in 76% to 89% of the cases, depending on the series. There is a predominance in the 20 to 30 year age range. Several factors could be involved in radial paralysis (fracture of the distal third of the humerus, spiral fracture, plate fixation, nonunion). The anterolateral approach allows a better exposure of the nerve. Unlike other authors, we do no advocate exploration of the injured nerve during surgical treatment of the fracture because it is most difficult to determine the potential for recovery of a continuous nerve. Conclusion: The risk of radial nerve paralysis is greatest for spiral fracture of the distal third of the humerus. In such cases, it may be useful to explore the nerve during the primary procedure and insert a plate. For other cases, we prefer to wait for spontaneous nerve recovery. If reinnervation is not observed at 100 days, we undertake exploration

In combined high median and ulnar nerve injury, transfer of extensor digiti minimi (EDM) and extensor carpi ulnaris (ECU) nerve branches to restore intrinsic hand function is previously described. A segment of nerve graft is required in this operation. The aim of this study was to evaluate the feasibility of using the sensory branch of radial nerve (SRN) as an “in situ vascular nerve bridge'” (IVNB) instead of sural nerve graft. Twenty fresh cadavers were dissected. In proximal forearm incision, the feasibility of transferring the EDM/ECU branches to the distal stump of transected SRN was evaluated. In distal forearm incision, the two distal branches of the SRN were transected near the radial styloid process to determine whether transfer of the proximal stumps of these branches to the motor branches of the median (MMN) and ulnar (MUN) nerves is possible. The number of axons in each nerve was determined. The size of the dissected nerves and their location demonstrate that tension free nerve coaptation is easily possible in both proximal and distal incisions. Utilisation of the SRN as an IVNB instead of the conventional sural nerve graft has some advantages. Firstly, the sural nerve graft is a single branch and could be sutured to either the MMN or MUN, whereas the SRN has two terminal branches and can address both of them. Secondly, the IVNB has live Schwann cells and may accelerate the regeneration. Finally, this IVNB does not require leg incision and could be performed under regional anesthesia. The SRN as an IVNB is a viable option which can be used instead of conventional nerve graft in some brachial plexus or high median and ulnar nerve injuries when restoration of intrinsic hand function by transfer of EDM/ECU branches is attempted

Injuries to the limb are the most frequent cause of permanent disability following combat wounds. We reviewed the medical records of 450 soldiers to determine the type of upper limb nerve injuries sustained, the rate of remaining motor and sensory deficits at final follow-up, and the type of Army disability ratings granted. Of 189 soldiers with an injury of the upper limb, 70 had nerve-related trauma. There were 62 men and eight women with a mean age of 25 years (18 to 49). Disabilities due to nerve injuries were associated with loss of function, neuropathic pain or both. The mean nerve-related disability was 26% (0% to 70%), accounting for over one-half of this cohort’s cumulative disability. Patients injured in an explosion had higher disability ratings than those injured by gunshot. The ulnar nerve was most commonly injured, but most disability was associated with radial nerve trauma. In terms of the final outcome, at military discharge 59 subjects (84%) experienced persistent weakness, 48 (69%) had a persistent sensory deficit and 17 (24%) experienced chronic pain from scar-related or neuropathic pain. Nerve injury was the cause of frequent and substantial disability in our cohort of wounded soldiers. Cite this article: Bone Joint J 2014;96-B:254–8

Objective. Neurological injuries are most common complication, which has refrained many surgeons from opting elbow arthroscopy for indicated surgeries. The objective of this study was to evaluate the safety of anterolateral (AL) and posterolateral (PL) portals and chances of injury to the radial nerve and posterior interosseous nerve around the elbow joint during elbow arthroscopy. Material & Methods. A cadaveric study was conducted on 16 non dissected cadavers (32 elbow specimens) between the period of January 2021 to June 2022. Four portals were established using 4 mm Steinmann pins which are Proximal AL Portal, Mid-AL Portal, Distal AL Portal and PL Portal. The measurements of each portal were taken for each nerve and compared with each other. Results. In our study, the mean age was 56.5 years. Proximal AL Portal was found to be at an average distance of 12.03 mm from radial nerve, 9.48 mm from the PIN and 9.35 mm from the PACN (Posterior Antebrachial Cutaneous Nerve). Distal AL Portal was at an average distance of 7.95 mm away from the radial nerve which closest to radial nerve amongst all portals. The radial nerve had the most risk of being injured out of all the nerves in the AL and PL portals followed by PIN and PACN in AL portal. Ulnar nerve was found safe in the PL portal. Conclusion. The PL portal was safer than the AL portal for conducting elbow arthroscopy. Care should be taken specially to protect radial nerve while performing elbow arthroscopy

Helical plates are preferably used for proximal humeral shaft fracture fixation and potentially avoid radial nerve irritation as compared to straight plates. Aims:(1) to investigate the safety of applying different long plate designs (straight, 45°-, 90°-helical and ALPS) in MIPO-technique to the humerus. (2) to assess and compare their distances to adjacent anatomical structures at risk. MIPO was performed in 16 human cadaveric humeri using either a straight plate (group1), a 45°-helical (group2), a 90°-helical (group3) or an ALPS (group4). Using CT-angiography, distances between brachial arteries and plates were evaluated. Following, all specimens were dissected, and distances to the axillary, radial and musculocutaneous nerve were evaluated. None of the specimens demonstrated injuries of the anatomical structures at risk after MIPO with all investigated plate designs. Closest overall distance (mm(range)) between each plate and the radial nerve was 1(1-3) in group1, 7(2-11) in group2, 14(7-25) in group3 and 6(3-8) in group4. It was significantly longer in group3 and significantly shorter in group1 as compared to all other groups, p<0.001. Closest overall distance (mm(range)) between each plate and the musculocutaneous nerve was 16(8-28) in group1, 11(7-18) in group2, 3(2-4) in group3 and 6(3-8) in group4. It was significantly longer in group1 and significantly shorter in group3 as compared to all other groups, p<0.001. Closest overall distance (mm(range)) between each plate and the brachial artery was 21(18-23) in group1, 7(6-7) in group2, 4(3-5) in group3 and 7(6-7) in group4. It was significantly longer in group1 and significantly shorter in group3 as compared to all other groups, p<0.021. MIPO with 45°- and 90°-helical plates as well as ALPS is safely feasible and showed a significant greater distance to the radial nerve compared to straight plates. However, distances remain low, and attention must be paid to the musculocutaneous nerve and the brachial artery when MIPO is used with ALPS, 45°- and 90°-helical implants. Anterior parts of the deltoid insertion will be detached using 90°-helical and ALPS implants in MIPO-technique