Refinements in the Treatment of Volkmann Ischemic Contracture of the Forearm: A Thematic Review.

Volkmann contracture of the forearm is a devastating complication of muscle ischemia. It is most commonly associated with trauma and a sequela of compartment syndrome. In the last few decades, much has improved in our ability to treat these patients. Our preferred treatments are presented along with representative case studies that illustrate the functional gains that can be achieved with a focus on moderate and severe contractures. Refinements in care that have evolved over the past 40 years of experience in treating these patients are presented.

Treatment of an Ulnar Fracture Bone Defect Using Heterotopic Bone Autograft: A Case Report.

CASE: Autologous bone grafting has wide applications for the treatment of bony defects. Generally, cancellous or corticocancellous bone grafts are used depending on the characteristics and size of the bony defect and wound bed. The use of heterotopic bone as a potential source of bone graft has not been widely reported. We present a 56-year-old right-hand-dominant male victim of dog mauling who sustained a right ulnar fracture with a 5-cm bony defect, treated with the use of heterotopic bone autograft. CONCLUSION: Heterotopic bone can be successfully used as an autograft in the treatment of bony defects.

Surgical Reconstruction for the Triphalangeal Thumb.

The triphalangeal thumb poses a complex reconstructive challenge to the congenital hand surgeon due to its rarity and variable anatomy. We discuss the available evidence, reporting clinical characteristics and outcomes of surgical reconstructive procedures of triphalangeal thumb alongside a representative case. The congenital hand surgeon must approach each patient with triphalangeal thumb individually to optimize the use of available tissues to maximize functional and aesthetic outcomes.

Trapezial Fractures and Associated Fractures of the Ulnar Carpus: A Ring-Bone Model.

BACKGROUND: Fractures of the trapezium are rare; however, the incidence may be under-reported in the literature. The incidence of ulnar-sided carpal body fractures as a concomitant injury has not been reported. Our study aimed to evaluate the incidence of trapezium fractures in conjunction with ulnar-sided carpal body fractures. METHODS: Over a five-year period, our electronic records were queried and charts reporting carpal bone fractures were reviewed. All cases of trapezium fracture were evaluated further and presented. RESULTS: Eight trapezial fractures were identified, representing 8% of all carpal fractures and 26% of all nonscaphoid carpal fractures. Of the eight trapezium fractures identified, five (62.5%) were associated with Bennett fracture and four (50%) were associated with ulnar-sided carpal fractures. CONCLUSION: Our study demonstrates a higher incidence of trapezial fractures than previously reported. Previously unreported concomitant ulnar-sided carpal body fractures are reported at a frequency nearly equal to that of concomitant Bennett fractures in our series. We propose a mechanism of injury where the carpal canal and overlying transverse carpal ligament function as a ring-bone construct similar to the pelvis. When a trapezium fracture is identified, we recommend additional evaluation for ulnar-sided injuries of the carpus.

Limb Fasciotomy for COVID-19 Patients: Is the Chance to Cut a Chance to Cure?

Based on the findings of two consecutive cases of upper extremity compartment syndrome encountered at our institution, we hypothesize that the presence of compartment syndrome in the unstable COVID-19 patient may be associated with high mortality and low limb salvage rates. A literature search was conducted with key search terms, including "compartment syndrome, fasciotomy, COVID, and coronavirus." Articles describing patients with a confirmed COVID-19 diagnosis who developed extremity compartment syndrome were included in our study. The primary outcome investigated was patient survival. Secondary outcomes included limb survival and limb salvage. Limb salvage was calculated in patients who survived to time of discharge, whereas limb survival was counted for all patients. We then added our two cases to the findings reported in our literature to determine current overall limb salvage and patient survival rates. Our review of the literature yielded six case reports of ten extremities that developed compartment syndrome in the COVID-19 positive patient. Overall survival was four of six patients (67%). The overall limb survival rate at the time of hospital discharge was three of 10 (30%). With the addition of our two cases, overall survival was four of eight (50%) and overall limb survival rate was three of 12 (25%). Furthermore, with inclusion of our two cases, the patient survival rate of hemodynamically unstable patients was only three of seven (43%). The development of compartment syndrome in the unstable COVID-19 patient may be a harbinger of death, and the decision to proceed with operative intervention is challenging, complex, and in some cases must prioritize life over limb.

Load Sharing in the Femur Using Strut Allografts: A Biomechanical Study.

Background: Femoral strut allografts are used in revision hip arthroplasty for management of bone loss associated with implant failure or periprosthetic fractures. They have also been used to treat unremitting thigh pain in well-fixed cementless femoral stems, to address the differential in structural stiffness between the stem and femoral shaft. Our study used an in vitro biomechanical model to measure the effect of placement of allografts on femoral strains, to determine their load-sharing capacity. Material and methods: Three rosette strain gauges were applied to the femoral surface of each of 6 cadaveric femurs, at the stem tip level on anterior, medial, and lateral cortices. After stem implantation, cortical strut allografts were applied to the lateral femoral shaft and secured with 4 Dall-Miles cables. A fourth gauge was placed on the midpoint of the allograft. Strains were recorded in the intact femur, then the implanted femur with and without the allograft under simulated physiologic loading in a load frame. Results: Reduction in distal femoral principal strains, between 12% and 59%, was seen in all cortices following placement of the allograft. Under axial loading, 30% of the strain in the lateral cortex was borne by the allograft. Greater reductions in strain, by as much as 59%, occurred under axial load and torque. Conclusion: The results of this biomechanical model indicate that by placement of an allograft, cortical strains can be reduced to levels approaching those in an intact femur, supporting this technique for treatment of unremitting thigh pain in well-fixed prostheses.

Lumps, bumps, and nerve-end stumps? A collection of guidelines for safe in-office lipoma excision.

Lipomas are benign adipose tumors frequently encountered by the primary care physician. They are the most common soft tissue tumor diagnosed in the adult population and generally present as soft, round, and discrete masses located in the subcutaneous tissues of nearly any anatomical location. In-office excision has become common practice, however, limitations of such settings along with varying locations and presentations of these lipomas may render the patient more susceptible to complications. This manuscript aims to provide the general practice provider with a set of safety guidelines for in-office lipoma excision, thus decreasing the chance of major complications. These guidelines include: obtaining a clear diagnosis prior to excision, ensuring familiarity with the anatomical location prior to excision, deferring excision if the lipoma appears to be located in the subfascial plane, and aborting excision if the patient is at risk for local anesthetic toxicity, if symptoms of motor blockade develop, or if uncontrolled bleeding occurs. The importance of these guidelines is highlighted by a case report of radial nerve injury sustained during an in-office lipoma excision requiring operative reconstruction of the radial nerve.

Cross-Sectional Areas and Volumes Occupied by Implants in Simulated Scaphoid Fractures.

PURPOSE: This study determined the volume of bone replaced by an implant at the proximal and distal poles of simulated scaphoid fractures. We also measured the cross-sectional area of the implant relative to the cross-sectional area of the scaphoid at 2 different simulated fracture locations. METHODS: Microcomputed tomograhy scans of 7 cadaveric scaphoids were used to create 3-dimensional models in which transverse proximal pole and midwaist fractures were simulated. The volume occupied by 5 commonly used implants and the cross-sectional area occupied at the surface of the fractures was measured using a computer modeling software. RESULTS: For simulated proximal pole fractures, the implants replaced 1.5%-7.4% of the fracture cross-sectional area and 1.2%-6.4% of the proximal fragment bone volume. For midwaist fractures, the implants replaced 1.5%-6.8% of the fracture cross-sectional area and 1.8%-4.6% of the proximal pole volume. Although the different implant designs replaced different areas and volumes, all these differences were small and below 4%. CONCLUSIONS: This study provides data that relate to one aspect of fracture healing, specifically, the surface area occupied by 5 different implants in proximal and midwaist scaphoid fractures as well as the volume of bone replaced by the implant. CLINICAL RELEVANCE: As opposed to the impression provided by 2-dimensional planar imaging, when studied using a 3-dimensional model, the volume and surface area replaced by an implant represent a minimal percentage of scaphoid bone, suggesting a negligible clinical effect.

So You Think You Don't Plunge? An Assessment of Far Cortex Drill Tip Plunging Based on Level of Training.

INTRODUCTION: Drill bit tip plunging past the far cortex places critical anatomical structures at risk. This study measured plunging past the far cortex based on level of training. The time required for screw placement when a depth gauge was used to measure bone tunnel depth was compared to the time required for screw placement when bone tunnel depth was measured in real time. MATERIALS AND METHODS: Thirty orthopedic surgery staff with 1-37 years of experience applied 10-hole plates to cadaveric limbs. Procedures were performed using two different drilling systems. Time and plunge depth were recorded. RESULTS: Penetration past the far cortex ranged from an average of 11.9 mm in the novice group to an average of 6.1 mm in the experienced group (P <0.001). The time required to drill and place a screw decreased by an average of 14 seconds per screw when depth gauge use was eliminated. CONCLUSIONS: Penetration past the far cortex occurred at all levels of training, but decreased with increased levels of experience. Real time measurement of bone tunnel length decreased total drilling time. The time saved with real time measurement decreased with increased level of experience.

Single-stage Reconstruction of Elbow Flexion Associated with Massive Soft-Tissue Defect Using the Latissimus Dorsi Muscle Bipolar Rotational Transfer.

In the upper extremity, the latissimus dorsi muscle can be used as an ipsilateral rotational muscle flap for soft-tissue coverage or functional reconstruction of arm and elbow. Patients who have both major soft-tissue loss and functional deficits can be successfully treated with a single-stage functional latissimus dorsi rotational muscle transfer that provides simultaneous soft-tissue coverage and functional reconstruction. METHODS: Our data base was queried for all patients undergoing a rotational latissimus dorsi muscle transfer for simultaneous soft-tissue coverage and functional reconstruction of elbow flexion. Four patients were identified. A chart review documented the mechanism of injury, associated injuries, soft-tissue defect size, number of surgical procedures, length of follow-up, last elbow range of motion, and flexion strength. RESULTS: Four patients with loss of elbow flexion due to traumatic loss of the anterior compartment muscles and the overlying soft tissue underwent simultaneous soft-tissue coverage and elbow flexorplasty using the ipsilateral latissimus dorsi as a bipolar muscle rotational tissue transfer. All flaps survived and had a recovery of Medical Research Council Grade 4/5 elbow flexion strength. No additional procedures were required for elbow flexion. The surgical technique is described and supplemented with surgical technique video and patient outcome. CONCLUSIONS: This patient series augments the data provided in other series supporting the safety and efficacy of this procedure which provides both soft-tissue coverage and functional restoration of elbow flexion as a single-stage procedure in the setting of massive traumatic soft-tissue loss of the arm.

Functional free muscle transfer for upper extremity reconstruction.

BACKGROUND: Functional losses in the upper extremity that cannot be restored by nerve or tendon transfer present a treatment dilemma to the reconstructive surgeon. Common indications for functional free muscle transfer include late reconstruction of brachial plexus injuries, traumatic muscle loss, Volkmann ischemic contracture, loss resulting from oncologic resection, and congenital absence of motor function as seen in arthrogryposis. METHODS: This article reviews the authors' experience in upper extremity reconstruction using functional free muscle transfer. The indications and technique for functional free muscle transfer in the upper extremity are reviewed. Surgical details for sites of reconstruction and the nuances of harvesting the main donor muscles are presented. RESULTS: Specific cases and outcome reviews for several series of functional free muscle transfers are presented. CONCLUSION: Functional free muscle transfer is the best and final option for restoring function in an otherwise nonreconstructible limb.

Anatomic study of the flexor carpi ulnaris muscle and its application to soft tissue coverage of the elbow with clinical correlation.

BACKGROUND: The posterior elbow is prone to soft tissue loss that may require reconstructive methods for wound healing to be achieved. The flexor carpi ulnaris (FCU) muscle has been described for coverage in case reports and small series. Previous studies give conflicting anatomic findings about the dominant vascular pedicle for the FCU. METHODS: Twenty-five cadaveric specimens were dissected. Pedicle location, number, and distance from the medial epicondyle were recorded along with the extent of posterior elbow coverage. Chart review was conducted during a 4-year period. Eight patients who underwent FCU rotational flap coverage were identified. Those flaps relied entirely on a single proximal pedicle. RESULTS: The vascular pedicles from the ulnar artery or recurrent ulnar artery were identified in 24 of 25 specimens. The average distance from the tip of the medial epicondyle to the first pedicle was 5.7 cm (range, 3 to 10 cm). The length of muscle coverage proximal to the olecranon tip averaged 9.3 cm. The clinical follow-up of 7 patients requiring FCU rotational flaps for coverage of the posterior elbow showed that all flaps survived and provided adequate coverage for the defect. CONCLUSIONS: The FCU rotational pedicle flap provides predictable coverage of small to medium-sized defects about the posterior elbow. Although it is relatively consistent, the proximal vascular pedicle does demonstrate some variability, which should be considered in planning surgery. The consistent distal extent of the FCU muscle belly provides wider proximal coverage of defects.

Soft-tissue coverage of the elbow.

The elbow requires a durable and pliable soft-tissue envelope. Injuries, infections, or tumors that result in exposed tendon, bone, or implants require expedient soft-tissue coverage. Familiarity with various options for coverage can help tailor treatment to the defect size and minimize donor-site morbidity. In this article, emphasis is placed on muscle and fasciocutaneous flaps that have been shown to have reliable vascularity and predictable outcomes.

Management of established Volkmann's contracture of the forearm in children.

As with many diagnoses in medicine, the best treatment for Volkmann's ischemic contracture is prevention. Early recognition and prompt treatment of impending Volkmann's ischemia should decrease the presentation and severity of late contracture and hand dysfunction. The authors have found the flexor muscle slide the best treatment option for mild and moderate deformity. This procedure can be combined with additional reconstructive procedures to maximize functional outcome. The authors believe this procedure results in the best preservation of the muscle resting length and limits the scarring around the adjacent muscles. For severe cases,early wide excision with functional free-muscle transfer may limit the injury to the nerves, decreasing the distal problems associated with mo-tor and sensory impairment in the hand.

Extra-articular distal radial fracture malunion.

With the increase in surgical options for the treatment of distal radius fractures, the authors anticipate that distal radial fracture malunions will be a less frequently seen problem. Nevertheless, they will still occur. Although patient selection has been weighted toward the younger patient, we believe that surgery should be based on patient activity level, functional needs, and disability related to the malunion. With advances in biotechnology and improved anesthetics, surgical intervention even in the older and osteopenic population is now more promising. Surgical intervention still requires appropriate patient selection, careful preoperative planning, and meticulous surgical technique. The appropriate surgical procedure should be tailored to the patient's symptoms, age, needs, and radiographic findings.