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

Stevanovic, Milan V., MD*; Cuéllar, Vanessa G., MD*; Ghiassi, Alidad, MD*; Sharpe, Frances, MD*†

Plastic and Reconstructive Surgery – Global Open: September 2016 - Volume 4 - Issue 9 - p e1066
doi: 10.1097/GOX.0000000000001066
Original Article
Open
SDC
United States
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Introduction: 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.

From the *Division of Hand and Microsurgery, Department of Orthopaedics, University of Southern California and Los Angeles County Medical Center, Los Angeles, Calif.; and Department of Orthopedics, Southern California Permanente Medical Group, Fontana, Calif.

Received for publication July 13, 2016; accepted August 10, 2016.

Disclosure: The authors have no financial interest to declare in relation to the content of this article. The Article Processing Charge was paid for by the authors.

Supplemental digital content is available for this article. Clickable URL citations appear in the text.

Milan V. Stevanovic, MD, Division of Hand and Microsurgery, Department of Orthopaedics, 1520 San Pablo St, Suite 200, Los Angeles, CA 90033, E-mail: stevanov@usc.edu

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially.

Loss of elbow flexion reduces one’s ability to position the hand in space affecting activities of daily living such as feeding, dressing, and perineal hygiene. With normal shoulder function, approximately 120 degrees of elbow flexion is required for placing the hand to the mouth and approximately 75 degrees for placing the hand to the perineum.1,2 Several options exist for reconstruction of elbow flexion, which include nerve transfer, Steindler flexorplasty, triceps tendon transfer, pectoralis major transfer, latissimus dorsi muscle transfer, and functional free-muscle transfer. In the setting of soft-tissue loss in combination with loss of elbow flexion, the bipolar latissimus dorsi rotational transfer provides a single-stage option to address both deficits.

The versatility of the latissimus dorsi muscle for soft-tissue and functional reconstruction is well described. As a free-tissue transfer for soft-tissue coverage, it has numerous applications throughout the upper and lower extremities, chest wall, and abdomen. As a rotational transfer for soft-tissue coverage, it can be used for soft-tissue coverage of the arm and elbow, spine, neck, and chest wall.3–7 Functional reconstruction in the upper extremity using the latissimus dorsi has been reported as both rotational and functional free-muscle transfer. Both techniques provide the added benefit of supplying functional reconstruction in combination with soft-tissue coverage.

The application of the latissimus dorsi as a bipolar muscle transfer to restore elbow flexion was first described by Schottstaedt et al8 in 1955 for a patient with poliomyelitis. Subsequent clinical reports have documented the use of the latissimus dorsi muscle transfer in patients with loss of elbow flexion due to poliomyelitis, brachial plexus injuries, congenital absence of elbow flexors, and traumatic or posttraumatic loss of the anterior compartment of the arm. Most studies include patients with a mixture of diagnoses for which the transfer is being performed and only a few of which include a combined functional and soft-tissue defect.9–20

Preoperative assessment of the latissimus dorsi muscle function is emphasized by several authors.11,21,22 Preoperative evaluation is more important when the latissimus may have been affected by the same condition that has caused the loss of upper extremity function, such as brachial plexus injury or shoulder girdle trauma, or congenital weakness or deficiency as may occur in arthrogryposis. Isolated testing of latissimus dorsi function is not routinely performed during clinical examination and the technique of evaluating this muscle may not be familiar to many clinicians. (See video, Supplemental Digital Content 1, which demonstrates the physical examination of the latissimus dorsi muscle. This video is available in the related videos section of the full text article on PRSGlobalOpen.com or available at http://links.lww.com/PRSGO/A267.)

Video Graphic 1.

Video Graphic 1.

The unique use of the latissimus dorsi muscle transfer—both to address a soft-tissue defect and to restore elbow flexion or extension simultaneously—has been described only in small case reports of patients.15,23–26 This article adds to the literature on combined biceps reconstruction in combination with soft-tissue coverage and supplements the literature with video technique of the clinical examination of the latissimus dorsi, the critical portions of the surgical procedure, and illustrative case outcome.

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METHODS

Approval for this study was obtained from our institutional review board. Our database was queried from 2010 to 2015 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. Preoperative examination of the latissimus was conducted using one or several of the techniques described in Table 1, Figure 1, and the video supplement. (See video, Supplemental Digital Content 1, which demonstrates the physical examination of the latissimus dorsi muscle. This video is available in the related videos section of the full text article on PRSGlobalOpen.com or available at http://links.lww.com/PRSGO/A267.)

Table 1.

Table 1.

Fig. 1.

Fig. 1.

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Surgical Technique

All surgical sites had at least one prior surgery to debride devitalized tissue and to treat associated injuries. At the time of muscle transfer, a repeat debridement was performed and any additional soft-tissue reconstruction, including nerve grafting was completed. The recipient defect site was extended distally as needed to expose the distal stump of the biceps, into which 2 parallel Krackow nonabsorbable sutures were placed.

The technique for harvesting and transferring the latissimus dorsi has been well described. The following text summarizes our technique with emphasis on specific details critical to this procedure. Surgery was performed with the patient in the lateral decubitus position. The entire lateral side from the ilium to the shoulder girdle and including the affected arm was included in the preparation site. The defect size on the anterior arm and the distance from the proximal aspect of the wound to the approximate axis of rotation of the flap (roughly the level of the coracoid process) were measured. The skin paddle was planned equidistant of this measurement on the chest wall relative to the flap axis of rotation and was designed to approximately match the area of the anterior soft-tissue defect (Fig. 2).

Fig. 2.

Fig. 2.

The skin incision for harvesting the latissimus began in the posterior axillary fold after the course of the latissimus along its midline axis to four-finger-breadths cephalad to the posterior iliac crest, incorporating a skin paddle at the appropriately marked position. The dissection of the latissimus was carried out in the suprafascial plane. The muscle resting length was marked with the arm placed in full forward flexion and abduction. Marking sutures were placed at 5 cm intervals. The muscle was then fully mobilized. The pedicle was dissected and mobilized, dividing the branch to the serratus anterior to gain additional pedicle length and mobility and releasing any fascial bands adjacent to the artery. The tendinous insertion was released from the humerus and two parallel Krackow nonabsorbable sutures were placed in the tendon.

A transverse incision was made over the coracoid, and a subcutaneous tunnel was developed above the axillary fascia connecting the posterior and anterior incisions. Blunt dissection below the pectoralis major tendon was carried out to the coracoid and the tendinous insertion was passed to the coracoid and secured to its neo origin using the preplaced Krackow sutures. The latissimus was then tubularized and passed through the subcutaneous tunnel to the anterior arm, avoiding any kinking of the pedicle.

Muscle resting length was restored with the elbow in full extension, and excess muscle length was trimmed from the caudad origin of the latissimus. The tubularized latissimus was then wrapped around the remaining stump of the biceps tendon and any remaining portion of the musculotendinous junction. It was then secured using the preplaced Krackow sutures. Although resting length was restored with the elbow in extension, the repair was completed with the elbow flexed. Muscle tension was assessed by checking both the restoration of the preplaced marking sutures for muscle resting length and the ability of the transferred muscle to maintain the elbow at 90 degrees of flexion. If the transfer did not maintain the elbow at 90 degrees, then sutures were removed and the muscle was further advanced. The pedicle was checked for any signs of compression or tension as the arm was moved from adduction to abduction. The wounds were closed over drains at the donor and recipient sites.

Postoperatively, patients were kept immobilized in a sling with an abduction pillow for 8–9 weeks. At 4 weeks, the patients were asked to start isometric contraction of the biceps when they are at 90 degrees of elbow flexion. After 9 weeks, the patient began working on regaining extension at a rate of 10–20 degrees per week. Light and progressive strengthening began at 3 months, progressing to unrestricted activity by 6 months. (See video, Supplemental Digital Content 2, which describes the surgical technique and functional outcome of latissimus dorsi muscle transfer. This video is available in the Related Videos section of the Full Text article on PRSGlobalOpen.com or available at http://links.lww.com/PRSGO/A268.)

Video Graphic 2.

Video Graphic 2.

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RESULTS

Four patients were identified who had undergone early simultaneous reconstruction of elbow flexion in combination with soft-tissue reconstruction. The rotational latissimus transfer was performed at an average of 12 days after the initial injury (range: 8–21 days). There were 3 humerus fractures, and 2 were open. There were 2 brachial artery injuries requiring emergent reconstruction. Three patients had nerve contusions. The median nerve was most commonly affected. One patient required median and radial nerve reconstruction (Tables 2 and 3). There were no complications at the recipient site. No patient required additional surgery to advance the latissimus muscle. One patient developed an infected hematoma at the donor site (patient # 3) and required three additional surgeries for irrigation and debridement with later delayed primary wound closure. Case summaries are detailed below.

Table 2.

Table 2.

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Patient #1

The patient was a 19-year-old female passenger involved in a motor vehicle accident (MVA). She sustained an open right-humerus fracture with a large anterior soft-tissue defect, consisting of skin, subcutaneous tissue, and the anterior muscle compartment of the arm. Associated injuries included traction neuropraxias to median, radial, and ulnar nerves and a compartment syndrome of the forearm. She was initially treated at an outside hospital with forearm fasciotomy and repeated irrigation and debridement. Upon transfer, she underwent initial debridement and external fixation of the humerus. Three weeks after her injury, a bipolar latissimus dorsi muscle with a skin paddle was used for biceps reconstruction and soft-tissue coverage of the arm. The forearm fasciotomy wound was partially closed, and the split-thickness skin graft was required at the distal arm and proximal forearm.

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Patient #2

A 26-year-old female sustained a dog bite to the left arm and forearm. Her biceps and brachialis muscles were absent over the distal 2/3 of the humerus. She had an associated median nerve contusion and an open ulna fracture. She underwent 2 debridements. Ten days after the initial injury, she underwent a rotational latissimus dorsi muscle transfer for biceps reconstruction. A large skin paddle was harvested to provide soft-tissue coverage over the arm and proximal forearm. Her ulna fracture was stabilized with plate fixation and split thickness skin graft was applied to the forearm wounds.

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Patient #3

A 6-year-old boy was a seat-belted passenger in an MVA. He had a closed fracture of the humerus associated with a subtotal internal amputation of the biceps, brachialis, brachial artery, median nerve, and radial nerve, and a contusion of the ulnar nerve. He underwent emergent debridement and vascular reconstruction. The humerus was stabilized with an anterior plate. Two additional debridements were performed. One week after the injury, he underwent a latissimus dorsi rotational transfer for biceps reconstruction and soft-tissue coverage. He had a simultaneous median and radial nerve reconstruction with sural nerve grafts. Ten days after surgery, he developed an infected hematoma at the recipient site requiring 3 debridements with subsequent delayed primary wound closure (Figs. 3–12).

Fig. 3.

Fig. 3.

Fig. 4.

Fig. 4.

Fig. 5.

Fig. 5.

Fig. 6.

Fig. 6.

Fig. 7.

Fig. 7.

Fig. 8.

Fig. 8.

Fig. 9.

Fig. 9.

Fig. 10.

Fig. 10.

Fig. 11.

Fig. 11.

Fig. 12.

Fig. 12.

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Patient #4

A 22-year-old man sustained a close-range gunshot wound to the right arm. His treatment course is summarized in the video (See video, Supplemental Digital Content 2, which describes the surgical technique and functional outcome of latissimus dorsi muscle transfer. This video is available in the Related Videos section of the Full Text article on PRSGlobalOpen.com or available at http://links.lww.com/PRSGO/A268.).

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DISCUSSION

The use of the latissimus dorsi as local tendon transfer was first described in 1949 to restore elbow extension.27 The tendinous insertion of the latissimus dorsi was detached from the humerus, mobilized proximally, and reinserted into the triceps. Transposition of the whole muscle as a functional transfer was described by Schottenstaedt et al8 in 1955. The entire latissimus dorsi muscle was mobilized and new origins and insertions were established to restore elbow flexion in one patient and elbow extension in another. Hovnanian28 described a similar case as a monopolar transfer in 1956. Since that initial description, the technique received little attention until Zancolli and Mitre20 reported on a series of 7 patients who underwent a bipolar latissimus dorsi transfer to restore elbow flexion. There have been only few studies that have described the simultaneous use of the latissimus to address soft-tissue loss in combination with restoring flexion.15,23–25,29

This study reports results in 4 patients who underwent early simultaneous reconstruction of elbow flexion with soft-tissue coverage. Although this is a small series, it represents the largest to date for this dual indication performed acutely as a one-stage procedure. Similar to other studies, our patients achieved comparable range of motion in flexion, extension, and supination (Tables 3 and 4). Our average flexion strength is slightly lower than other case reports, likely due to our 6-year-old patient who was only able to lift 0.75 pounds at his last visit. Table 4 summarizes previous papers reporting outcomes of patients undergoing early simultaneous soft-tissue coverage and biceps reconstruction.

Table 3.

Table 3.

Table 4.

Table 4.

Several authors emphasize the importance of preoperative evaluation of the latissimus dorsi muscle before using this as a transfer as the functional outcome is correlated to the preoperative strength of the latissimus.11,21,22 It is difficult to isolate the latissimus for strength testing, especially separating latissimus dorsi function from the teres major, which functions in concert with the latissimus dorsi to internally rotate and adduct the humerus. We describe several techniques to examine the latissimus dorsi. In the setting of acute trauma, many of these tests cannot be performed; however, the use of palpation for muscle bulk and contour and having the patient cough when the examiner palpates for muscle contraction are the most useful tools in this setting. The other techniques described provide a more detailed assessment of the muscle which can be conducted in the setting of late trauma, congenital anomalies, and brachial plexus injuries.

There are several points to the surgical technique that we have found important in improving functional outcomes. The inclusion of a skin paddle improves cosmesis, allows for monitoring of the flap, and improves muscle and tendon gliding of the transferred latissimus muscle. Next, the establishment of appropriately placed and secure fixation at the neo origin and neo insertion is important in the biomechanics of the transfer and reducing muscle stretching that may occur at the sites of attachment. Moving the latissimus insertion from the humerus to the coracoid improves the mechanical advantage of the muscle transfer and may also help stabilize the anterior shoulder when there is weakness about the shoulder girdle.21 The tensioning of any muscle transfer remains a surgical art rather than an exact science. Both overtensioning and undertensioning of a transferred muscle lead to disturbance of the length–tension curve for muscle force generation.30 Marking and restoring the muscle resting length helps maintain the appropriate actin–myosin overlap, so as to retain muscle strength in transfer. Slight overtightening of the transfer may help compensate for the anticipated stretching that may occur at the coaptation sites. To this end, the transferred muscle is expected to be able to maintain the elbow at a minimum of 90 degrees of flexion at the completion of the transfer. Finally, our postoperative protocol is slower than that described in other series. It is thought that this may contribute to the patients not requiring additional surgeries to tighten the muscle transfer. The muscular origin of the latissimus dorsi at the thoracodorsal fascia and the frequent need to trim the transferred muscle result in coaptation of latissimus to the stump of the biceps through muscle fibers that do not hold sutures well. For this reason, the repair site is protected for a longer period of time and the rehabilitation is progressed slowly.21,22,29

One of the patients developed an infected hematoma at the donor site. In the long term, no patients in this study reported complaints at the donor site. Any deficits in upper extremity function related to latissimus harvest were obscured by the traumatic injury. Early complications that can be seen at the latissimus dorsi harvest site include hematoma and seroma formation. We employ a quilting technique for donor site closure and maintain drains at the donor site until output is <5 mL over 24 hours.31,32 Shoulder girdle weakness has been measured after the harvest of the latissimus dorsi, particularly the loss of extension strength. Despite isolated weakness in muscle testing, global shoulder function scores remain high due to compensation for latissimus dorsi function by synergistic muscle groups (predominantly teres major, pectoralis major, and subscapularis).33–35

This study is limited by a small patient cohort and limited long-term follow-up. This is not uncommon for trauma patients, particularly those treated at an urban referral center.36 Nevertheless, final available data are comparable to previous reports in the literature. Although several options exist for reconstruction of elbow flexion, none except a functional free muscle transfer provides simultaneous reconstruction of a soft-tissue defect. This article adds to the available data on a procedure that is not commonly performed, and provides supplemental videos to help physicians refresh their technique and surgical pearls critical to achieving good functional outcomes.

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PATIENT CONSENT

Parents or guardians provided written consent for the use of the patient’s image.

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REFERENCES

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