The Lateral Arm Flap

The lateral forearm flap versus traditional upper extremity flaps: A comparison of donor site morbidity and flap thickness

INTRODUCTION

The lateral forearm flap (LFF) is a thin fasciocutaneous flap with a donor site that can be closed primarily.

METHODS

A retrospective analysis of donor site morbidity and hand function was performed in patients who underwent a radial forearm flap (RFF), ulnar artery perforator flap (UAPF), or LFF. Flap thickness was evaluated radiographically in 50 control patients.

RESULTS

Of 134 patients (lateral forearm flap: n = 49, RFF: n = 47, UAPF: n = 38), the LFF demonstrated significantly faster return to baseline hand grip strength (3 months vs. 12 months in RFF and UAPF; p < 0.001), had significantly fewer donor site complications (6.1% compared to 6.4% in RFF and 28.9% in UAPF; p = 0.003) and fewer sensory deficits (2.0% compared to 6.4% in RFF and 15.8% in UAPF sites; p = 0.013). The radiographic study confirmed the LFF to be the thinnest of all upper extremity flap options.

CONCLUSIONS

The LFF is an excellent forearm-based flap option with thin, pliable tissue and low donor site morbidity.

Cutaneous perforators of the arm and anatomical landmarks for defining the flap donor sites

PURPOSE

There are few studies searching for possible perforator flap donor sites on the arm. This study aimed to identify the locations of cutaneous perforators of the arm according to anatomical landmarks.

METHODS

Thirteen Thiel-fixed and latex-filled upper extremities of bodies donated to science were used. The distance between the acromion and medial or lateral epicondyle of the humerus was defined as the Y-axis, and the axis that cut the Y-axis perpendicularly through the epicondyles of the humerus was identified as the X-axis. The Y-axis was then divided into three parts Cutaneous arterial perforators were found using surgical dissection. The locations of the perforators were determined according to the defined lines and regions.

RESULTS

On the lateral side, there were 6.00 ± 2.08 perforators per arm, of which 56.4% were septocutaneous and 43.6% muscular. In all extremities, with in the distal 1/3 of the lateral arm, there were 1-4 radial collateral artery-based perforators. The mean distance of these perforators to the Y-axis was 1.16 ± 0.53 cm. On the medial side, there were 5.05 ± 1.44 perforators per arm, which were all septocutaneous perforators. In 85% of the extremities, within the middle 1/3 of the medial arms, there were 1-2 superior ulnar collateral artery-based perforators. The mean distance of these perforators to the Y-axis was 1.53 ± 0.61 cm.

CONCLUSION

There are always perforators from the radial collateral artery with in the distal third of the lateral arm. Within the middle third of the medial arm, it is usually possible to find a perforator from the superior ulnar collateral artery.

One-stage reconstruction of complex soft tissue defects in the hands using multidigit, chimeric, lateral arm, perforator flaps

PURPOSE

To describe our experience using microsurgically fabricated, multilobed, chimeric, lateral arm (LA) flaps to reconstruct hand injuries with complex, multidigit, soft tissue defects and to evaluate the morbidity and esthetic and functional outcomes of the donor sites.

METHODS

We performed a single center, retrospective analysis of 21 patients with hand wounds treated from October 2013 to February 2016. All patients underwent reconstruction using multilobed, chimeric, free, LA flaps. A self-reported questionnaire was used to assess donor site morbidity and satisfaction with the esthetic and overall functional result. Outcome measures were the Disabilities of the Arm, Shoulder and Hand (DASH) score, static 2-point discrimination score, and visual analogue scale.

RESULTS

The study included 21 patients (20 males and 1 female), with an average age of 32.14 years (range 18-45 years), who sustained traumatic injuries in road traffic accidents (n = 2) or industrial devices (n = 19). The average DASH score was 28.25 ± 2.3, the average 2-PD score was 7.20 ± 1.30, and the average visual analogue scale (VAS) was 0.38 ± 0.40. All 21 patients had sensory disorders at the donor site. Postoperative donor site complications comprised wound dehiscence (n = 1) and hematoma (n = 3). The patient-rated satisfaction score for the donor site was 5.40 ± 0.90, and 70% of the patients would undergo the same surgery again.

CONCLUSION

Microsurgical fabrication of multilobed, chimeric, LA flaps can exhibit sensory recovery and minimal pain but may cause hematoma and sensory disorders at the donor site. The flaps are a viable alternative for the reconstruction of complex, multidigit, soft tissue defects of the hands.

Comparison of anterolateral thigh, lateral arm, and parascapular free flaps with regard to donor-site morbidity and aesthetic and functional outcomes

BACKGROUND

The purpose of this study was to compare the morbidity and the aesthetic and functional outcomes of primarily closed donor sites of three commonly used free flaps.

METHODS

Sixty patients who had undergone free flap reconstruction (20 anterolateral thigh, 20 parascapular, and 20 lateral arm flaps) were included in this study. The average follow-up time was 50 months (range, 6 to 135 months). Patients assessed subjective donor-site morbidity and satisfaction with the aesthetic and overall functional result using a self-report questionnaire. Outcome measures were the Disabilities of the Arm, Shoulder and Hand questionnaire; the Lower Extremity Functional Scale; and the Medical Outcomes Study 36-Item Short-Form Health Survey questionnaire.

RESULTS

No significant differences in range of motion or in questionnaire, scale, or survey scores were detected. Sensory disorders were present in 100 percent (lateral arm), 90 percent (anterolateral thigh), and 45 percent (parascapular). No correlation to flap size was detected (187 cm for parascapular and anterolateral thigh, and 70 cm for lateral arm flaps). Postoperative complications were seromas (parascapular, n = 2), hematomas (parascapular, n = 1; lateral arm, n = 2), and dehiscence (n = 4 for each flap). Patient satisfaction with the donor site was rated 2.9 for lateral arm and anterolateral thigh flaps and 2.5 for parascapular flaps (1 = excellent, 6 = poor). Seventy percent of anterolateral thigh, 85 percent of lateral arm, and 100 percent of parascapular flap patients would choose their flap again.

CONCLUSION

In terms of reducing donor-site morbidity, the parascapular flap represents a valuable alternative to the anterolateral thigh and lateral arm flaps, but side positioning and increased seroma are drawbacks.

Estudo clínico do retalho lateral do braço ampliado

OBJETIVO: Avaliar prospectivamente os resultados obtidos no tratamento de pacientes portadores de lesões do revestimento cutâneo de dimensões menores ou iguais a 20cm de comprimento por 10cm de largura com a utilização do retalho microcirúrgico lateral do braço ampliado distalmente ao epicôndilo lateral do cotovelo. MÉTODOS: Foram operados 23 pacientes, 69,5% do sexo masculino, 73,9% de origem traumática e a região receptora foi o membro inferior em 65.2% dos casos. A idade variou de 6 a 62 anos, com média de 32 anos. O seguimento mínimo foi de 5 meses. RESULTADOS: Obtivemos sucesso na realização em 100% dos casos. As dimensões dos retalhos variaram de 9 a 20cm em comprimento, com média de 14cm e em largura, de 3 a 8 cm, com média de 5.5cm. A maior distância entre o epicôndilo lateral e a extremidade distal do retalho foi de 8 cm, variando de 2 cm até 8 cm, com média de 4.9cm. CONCLUSÃO: O retalho microcirúrgico lateral do braço ampliado distalmente ao epicôndilo lateral do cotovelo mostrou-se seguro para a cobertura cutânea de lesões de dimensões iguais ou menores a 20cm de comprimento por 10 cm de largura, com o prolongamento do retalho até 8cm distal ao epicôndilo lateral.

Reconstructive options after temporal bone resection for squamous cell carcinoma

Squamous cell carcinoma (SCC) of the temporal bone is a rare, aggressive and highly malignant tumour that requires specialised, multidisciplinary surgery for its treatment. Reconstruction of the defect is as crucial as the tumour ablation in terms of mortality and postoperative morbidity.

METHODS

The experience of the East Anglian Skull Base Surgery Service from 1982 to 2004 in managing 42 consecutive patients (22 females; age range 37-80 years) undergoing extended and lateral temporal bone resection for SCC is presented.

RESULTS

The overall 5-year survival was 31.0% (median follow up: 97 months) when both curative and palliative procedures were included. On multivariate analysis, the favourable prognostic factors were male sex, well-differentiated tumours and stage N(0) neck. The reconstructions in 38 patients were analysed. The majority (24/38) had free tissue transfer reconstructions and most of these were radial forearm free flaps. Later in the series, other free flap types such as anterolateral thigh flaps and lateral arm flaps were employed. Pedicled myocutaneous flaps and local flaps were also used.

CONCLUSIONS

This paper analyses the outcomes of the various reconstructions and discusses the evolution of their care in our unit. The information obtained from the review of our data is extrapolated to offer guidance on the choice of reconstructive option in these patients.

Rational flap selection and timing for coverage of complex upper extremity trauma

Reconstruction of complex extremity trauma continues to be a challenging task for plastic surgeons. Characteristics of such injuries include destruction of functional structures, often due to high energy trauma that causes significant invalidity. Before the era of free flaps, pedicled fasciocutaneous and muscle flaps were the only option for reconstruction of the severely injured upper extremity. The management of complex injuries of the upper extremity has changed with the development of reconstructive microsurgery. Nowadays, we have a great variety of different free flaps to cover defects of the upper extremity and restore function by innervated free flaps. Sensibility, skin thickness, texture, colour, durability, binding of the flap to the underlying structures, donor site morbidity, possibility of secondary reconstructive procedures, the surgeon's experience and operative facilities must all be taken into consideration for choosing the optimal reconstructive procedure. Not only the reconstructive und functional requirements but the timing of reconstruction is extremely important for final result. The purpose of this paper is to define the principles of flap selection and timing of flap reconstruction, according to the assessment of trauma in the upper limb.

The distal lateral arm flap for resurfacing of extensive defects of the digits

The distal lateral arm flap (DLAF) was used to reconstruct six extensive defects of the digits: 2 degloving injuries of the thumb and 4 major skin losses of the fingers. Two adjacent fingers were involved in 1 patient. Flap size ranged from 3 x 7 cm to 9 x 14 cm. Four flaps were reinnervated using the posterior cutaneous nerve of the forearm. All flaps survived, though 1 showed marginal necrosis. Average follow-up was 53.4 months. Thumb opposition scored 5 according to Kapandji; finger ROM averaged 50.75%; pinch strength 72.5%. Protective sensation with touch localization was restored. Patient satisfaction for resurfaced digits averaged 8.9 on a 10-points visual analogic scale. All donor sites resulted in a painless scar with good patient satisfaction. The DLAF offers a thin, pliable skin ideal for digit reconstruction, with low rate of donor site morbidity and can be considered when toe-to-hand flap transfer is not advisable or refused by the patient.

Use of Anterolateral Thigh and Lateral Arm Fasciocutaneous Free Flaps in Lateral Skull Base Reconstruction

Lateral skull base defects following tumor ablation are ideally reconstructed with microvascular free tissue transfer. Although the rectus abdominis free flap is the workhorse in skull base reconstruction, it has a number of drawbacks. Anecdotal reports have indicated that fasciocutaneous free flaps may be useful alternatives in selected cases. Patients undergoing lateral arm (4 cases) or anterolateral thigh (8 cases) fasciocutaneous free flap reconstruction of lateral skull base defects between 1999 and 2005 were therefore reviewed. Twelve consecutive patients (4 males, 8 females) with a mean age of 63 years (range, 39 to 74) underwent such reconstruction following resection of lateral (11 cases) and anterolateral (1 case) skull base lesions. Eight patients had squamous cell carcinoma, 3 had infection or osteoradionecrosis, and 1 had adenoid cystic carcinoma. The duration of surgery (from induction of anesthesia to exit from the operating room) averaged 14.5 hours (range, 10 to 19.5 hours). All donor sites were closed directly. All the flap transfers were successful, with minimal reconstructive and donor site morbidity. During the follow-up period (average, 18 months; range, 2-48 months), 2 patients died of metastatic disease, and another 2 died of other unrelated causes. The remaining 8 patients are alive and disease free. It is concluded that lateral arm and anterolateral thigh fasciocutaneous free flaps should be considered as viable reconstructive options for lateral skull base ablative defects.

Coverage of painful peripheral nerve neuromas with vascularized soft tissue: method and results

OBJECTIVE

Our goals are to describe a method of treating painful peripheral nerve neuromas by means of vascularized tissue coverage, report the results in seven patients, and discuss the indications for this treatment modality. An analysis of pain, functionality of the affected body part, professional activities of the patients, and medications before and after surgery is presented.

METHODS

Seven male patients (mean age, 45.1 yr) with posttraumatic nerve injuries, who had developed painful stump neuromas or neuromas-in-continuity, and who had unsuccessfully undergone several treatment procedures, were selected for the surgery described here. The operation included resection of the stump neuroma (four patients) or neurolysis of the neuroma-in-continuity (three patients) and coverage of the nerve with a vascularized fascial, fasciocutaneous, or perforator flap (three pedicled regional flaps and four free flaps). A modified quadruple visual analog scale was used to quantify pain before and after surgical treatment. The mean follow-up was 16.6 months.

RESULTS

The mean values of the quadruple visual analog scale (pain now/typically/at its best/at its worst) before surgery were 6.5/6.5/4.7/7.9. These values changed to 0.3/0.4/0/0.9 at a mean follow-up of 16.6 months after surgery. Five patients returned to their original profession, one receives a pension, and one began a less demanding job after undergoing surgery. Six of the seven patients received opioids before surgery (one had a spinal cord stimulator). After surgery, all patients stopped taking regular pain killers and the spinal cord stimulator was deactivated in one; two patients still take nonsteroidal anti-inflammatory drugs occasionally, but not on a regular basis.

CONCLUSION

Vascularized soft tissue coverage of painful peripheral nerve neuromas seems to be an effective and attractive, but also complex, method of treatment. This option may be considered and reserved for patients who have already undergone several pain treatment modalities without success.

The Truly Distal Lateral Arm Flap

The forearm part of the extended lateral arm flap may be separately raised on the most distal septocutaneous perforator of the posterior collateral radial artery. This truly distal lateral arm flap shares most of the advantages of the radial forearm flap and is associated with less donor site morbidity. From April 2000 to March 2004, we used 30 such flaps as the fasciocutaneous free flap of choice, mostly for reconstructions in the head and neck region. The eventful postoperative course observed in 5 of these flaps motivated us to evaluate the rationale and risk factors of this procedure. We prospectively analyzed the influence on the incidence of partial or complete flap loss of 19 patient-related or procedure-related characteristics that may have acted as risk factors. None were found to be of statistical significance. We found the distal lateral arm flap to have a less robust vascular anatomy than the radial forearm flap, resulting in the need for advanced surgical expertise to raise and handle it. As we recognized the difficulty of this flap to be associated predominantly with this anatomy of its vascular pedicle, we now take a more liberal stand toward the possibility of intraoperative conversion to the use of a radial forearm flap.

[Emergency free microvascular flap transfer for repair of a pharyngeal defect manifesting as carotid artery erosion hemorrhage]

We report on a case of an emergency free flap cover of a pharyngeal defect which was made necessary by aggressive digestive salivatory and radiation effects 3 weeks after neck-dissection and laser ablation of an epidermoid left tonsil carcinoma. Life threatening intraoral bleeding resulted from the erosion of branches of the external carotid artery. After management of the bleeding, massive blood transfusions and restoration of the patient's general condition, a sandwich patch cover of the transmural pharyngeal defect was achieved using a microvascular lateral arm flap. This aimed at preventing further digestive effects and bacterial colonisation of the neurovascular structures at the carotid triangle. Unfortunately, due to external mechanical forces, the flap became avascular and thus necrotic at the eighth postoperative day; however, until the successful replacement by a myocutaneous latissimus dorsi flap it remained water-tight and fulfilled its sealing task.