The microsurgical replantation of seven complete scalp avulsions: Is one artery sufficient?

Successful Repair and Management of Severe Scalp Avulsion Incurred during Birth in an Extremely Low Birth Weight Infant

Introduction

Minor head trauma, such as scalp abrasion, is relatively common during vaginal delivery, whereas fatal head trauma is rare. This case report describes the successful repair and management of severe scalp avulsion that occurred during vaginal delivery and consequent hemorrhagic shock in an extremely low birth weight infant. Case Presentation. An extremely low birth weight infant (26 weeks' gestational age) sustained extensive scalp avulsion during vaginal delivery that exposed the skull. The scalp laceration began in the frontal temporal region and extended bilaterally along the temporal region for 20 cm. The infant experienced hemorrhagic shock soon after birth due to bleeding from the wound and was placed in a closed incubator for intensive care. At 7 h after birth, the wounds were repaired using sutures. Bleeding was quickly controlled, and the infant recovered from hemorrhagic shock. A wet dressing was applied to the wound, and the flap healed without necrosis.

Conclusion

We successfully repaired severe scalp avulsion in this case. Scalp avulsion can cause severe bleeding and death. Bleeding control and the preservation of circulation are the most important factors in its repair and maintenance. In this case, suturing the wound effectively controlled the bleeding, and the application of wet dressing and a high-humidity environment thereafter may have contributed to the scalp's engraftment.

Modified Scalp Replantation for Total Scalp Avulsion: Scalp-Shifting Technique

BACKGROUND

Scalp replantation is the best treatment for scalp avulsion due to its functional and esthetic benefits. Regular scalp replantation requires only unilateral or bilateral superficial temporal vascular anastomosis. However, shear force always damages vessels in severe scalp avulsions. Short, superficial temporal vessels (STVs) make tension-free anastomosis challenging.

PURPOSE

The objective of this article is to improve the regular scalp replantation technique. When the STVs are short, tension-free anastomosis, and cosmetic symmetry can be achieved without vein grafts or vascular replacement.

METHOD

This study retrospectively reviewed 18 patients with scalp avulsion, of which 10 underwent scalp-shifting replantation, and 8 underwent regular scalp replantation with direct anastomosis of the STVs. Postoperatively, the authors, assessed whether there was a significant difference in the percentage of scalp survival and in the facial symmetry of patients between the 2 methods.

RESULT

The percentages of scalp survival and facial symmetry were good after surgeries using both methods, and no significant differences were observed.

CONCLUSION

The authors use scalp-shifting replantation to create tension-free anastomoses in cases where scalp avulsion injuries have left the superficial temporal arteries too short. This technique ensures facial symmetry, scalp reimplantation survival, and equally excellent results in function and esthetics.

Skull and Scalp En-Bloc Harvest Protects Calvarial Perfusion: A Cadaveric Study

BACKGROUND

 Calvarial defects are severe injuries that can result from a wide array of etiologies. Reconstructive modalities for these clinical challenges include autologous bone grafting or cranioplasty with biocompatible alloplastic materials. Unfortunately, both approaches are limited by factors such as donor site morbidly, tissue availability, and infection. Calvarial transplantation offers the potential opportunity to address skull defect form and functional needs by replacing "like-with-like" tissue but remains poorly investigated.

METHODS

 Three adult human cadavers underwent circumferential dissection and osteotomy to raise the entire scalp and skull en-bloc. The vascular pedicles of the scalp were assessed for patency and perfused with color dye, iohexol contrast agent for computed tomography (CT) angiography, and indocyanine green for SPY-Portable Handheld Imager assessment of perfusion to the skull.

RESULTS

 Gross changes were appreciated to the scalp with color dye, but not to bone. CT angiography and SPY-Portable Handheld Imager assessment confirmed perfusion from the vessels of the scalp to the skull beyond midline.

CONCLUSION

 Calvarial transplantation may be a technically viable option for skull defect reconstruction that requires vascularized composite tissues (bone and soft tissue) for optimal outcomes.

Skull and Scalp En-Bloc Harvest Protects Calvarial Perfusion: A Cadaveric Study

BACKGROUND

 Calvarial defects are severe injuries that can result from a wide array of etiologies. Reconstructive modalities for these clinical challenges include autologous bone grafting or cranioplasty with biocompatible alloplastic materials. Unfortunately, both approaches are limited by factors such as donor site morbidly, tissue availability, and infection. Calvarial transplantation offers the potential opportunity to address skull defect form and functional needs by replacing "like-with-like" tissue but remains poorly investigated.

METHODS

 Three adult human cadavers underwent circumferential dissection and osteotomy to raise the entire scalp and skull en-bloc. The vascular pedicles of the scalp were assessed for patency and perfused with color dye, iohexol contrast agent for computed tomography (CT) angiography, and indocyanine green for SPY-Portable Handheld Imager assessment of perfusion to the skull.

RESULTS

 Gross changes were appreciated to the scalp with color dye, but not to bone. CT angiography and SPY-Portable Handheld Imager assessment confirmed perfusion from the vessels of the scalp to the skull beyond midline.

DISCUSSION/CONCLUSION

 Calvarial transplantation may be a technically viable option for skull defect reconstruction that requires vascularized composite tissues (bone and soft tissue) for optimal outcomes.

Microsurgical replantation of a traumatic total scalp avulsion

We present a rare case of microsurgical replantation of a total scalp avulsion. A woman in her mid-60s was renovating a tractor when her hair was caught in a column drill resulting in traumatic scalp avulsion. The avulsed scalp involved the eyebrows and the entire hair-covered part of the scalp. The prehospital management and the conservation packing of the scalp was very effective. Microsurgical replantation was achieved with anastomoses of the left superficial temporal artery and one temporal vein on each side. The combination of the prehospital treatment and our university hospital setup made it possible to reattach the scalp with an ischaemia time of approximately 5 hours. A functional and aesthetically pleasing outcome was achieved, and the patient was discharged 6 days postoperatively with a vital scalp and no complaints. Five months postoperatively, she has no sign of alopecia and is regaining sensation and function of the scalp.A woman in her mid-60s was renovating a tractor when her hair was caught in a column drill resulting in traumatic scalp avulsion. The avulsed scalp involved the eyebrows and the entire hair-covered part of the scalp. The prehospital management and the conservation packing of the scalp was very effective.

Identifying Factors Affecting Outcomes in Scalp Replantation: A Systematic Review of the Literature

INTRODUCTION

 Replantation is the ideal treatment in traumatic scalp defects to provide immediate coverage with restoration of hair-bearing skin. However, data are limited to case reports and small case series. Comprehensive analysis of techniques and outcomes is not available. Our aim was to systematically analyze the available literature to better understand management and postoperative outcomes of patients undergoing scalp replantation.

METHODS

 A systematic review of the PubMed, Cochrane, and EBSCO databases was performed in October 2019. Search terms included "replantation," "replant," "revascularized," "revascularization," "avulsion," and "scalp." Only papers reporting microvascular replantation of completely avulsed scalps, including case reports, were included. Review articles, non-English language articles, articles discussing nonreplant coverage, incomplete scalp avulsions, and articles discussing delayed scalp replantation were excluded. Data extracted included demographics, percent of scalp affected, mechanism, operative technique, and postoperative outcomes. Statistical analysis was performed using Mann-Whitney U tests, Kruskal-Wallis, and chi-squared tests.

RESULTS

 From a total of 704 initial results, 61 studies were included for analysis comprising 149 scalps. Complete survival was achieved in 54.7%, partial survival in 38.9%, and failure in 6.7%. Total ischemia time greater than 12 hours was associated with complete replant failure. Arterial anastomoses appeared to protect against complete loss. The number of venous repairs, proportion of venous-to-arterial repairs, use of vein grafts, thromboprophylaxis, or intraoperative complications did not affect outcomes. Patients required significant volumes of blood products, which was associated with partial success. Salvage rate after unplanned return to the operating room was 60.0%. Normal hair growth was achieved in all surviving native scalp tissue.

CONCLUSION

 Scalp replantations, while technically challenging, are the ideal treatment for scalp avulsions. Fortunately, these have high rates of success. And as a focal point of a patient's appearance, this is invaluable in restoration of a sense of normalcy.

A thin superficial temporalis artery revealed by total necrosis of an island scalp flap, a case report

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Total necrosis of a scalp flap based on the STA is rare.

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Extensive exploration of the vascular supply of the scalp before pedicled flap is not a common rule.

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Impact of anatomic variations on scalp flap surgery is not well documented.

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Anatomical variation may impact negatively the outcome of single pedicled scalp flaps.

Introduction and importance

The superficial temporalis artery (STA) counts as one of the most reliable blood supplies capable of supporting the vascularization of the entire scalp. Therefore, total necrosis of a scalp flap based on the superficial temporalis artery is a rare complication.

Case presentation

A 43-year-old woman with a history of hypertension and cerebral stroke presented to our consultation for fronto-parietal scalp alopecia. The scar was the result of spontaneous healing of a chemical burn that occurred eight months earlier. We performed the first step of scalp expansion and raised a parietal expanded goblet island flap based on the right STA. In the postoperative period, the flap developed progressive necrosis. Despite the release of tension and stab incisions, the flap failed in a week. An angio-MRI revealed a thin STA on the right compared to the left side. After debridement, the necrosis was superficial, deep galea, and some subcutaneous tissues were viable. We performed a split-thickness skin graft that achieved a total wound closure.

Clinical discussion

An extensive exploration of the vascular supply of the scalp before raising a scalp flap is not a common rule. The anatomical variation that we discovered as a thin superficial temporal artery may have explained the total failure of this flap surgery.

Conclusion

Surgeons should keep in mind the possible existence of a detrimental anatomical variation when planning a single pedicled scalp flap.

Scalp and Forehead Injury: Management of Acute and Secondary Defects

The primary challenges in scalp reconstruction are the relative inelasticity of native scalp tissue and the convex shape of the calvarium. All rungs of the reconstructive ladder can be applied to scalp reconstruction, albeit in a nuanced fashion due to the unique anatomy and vascular supply to the scalp. Important defect variables to incorporate into the reconstructive decision include site, potential hairline distortion, size, depth, concomitant infection, prior radiation therapy, planned adjuvant therapy, medical comorbidities, patient desires, and potential calvarium and dura defects.

A case of scalp avulsion with prolonged ischemic time: indocyanine green angiography can aid in predicting replant survival

Background

Microsurgical replantation has become the most favorable treatment option for scalp avulsion. However, the accurate prediction of postoperative replant viability remains challenging.

Case presentation

In this article, we showed that (indocyanine green angiography, ICGA) can provide a much more precise prediction of replant necrosis than conventional clinical assessment in a rare case of complete scalp avulsion with prolonged ischemia time.

Conclusion

Clinical assessment of replant survival may be misleading in cases of complex tissue injuries and prolonged ischemic stress. This case provides insight into the promising utility of ICGA as an important adjuvant tool to better assess tissue perfusion and viability in scalp avulsion and possibly other types of replantation.

Vascular consideration in repair of total scalp avulsion

Successful total scalp replantation was performed in our case. Based on the angiosome concept and anatomical study, the avulsed scalp survived with unilateral anastomosis of the superficial temporal artery and superficial temporal vein, largely due to the presence of rich arterial and venous arcades in the scalp. The patient currently has no problems with activities of daily living, although total hypoaesthesia and dysfunction of the left frontal muscle of the forehead are present. In addition, the combined findings of hair growth pattern indicated the vascular territories of the scalp skin.

Cross-specialty developments: a summary of the mutually relevant recent literature from the journal of plastic, reconstructive and aesthetic surgery

Keeping abreast of current developments is increasingly challenging when the volume of specialty articles being published is rising exponentially, and it is most acute when surgical specialties overlap, as in the case of head, neck, and facial reconstructive surgery. Here, the potential for missing key developments presents a compelling case for a summary article that highlights articles likely to be of mutual relevance. We evaluated 129 original studies and 6 reviews published in the Journal of Plastic, Reconstructive, and Aesthetic Surgery between September 2012 and August 2014, and summarised the main papers of interest and merit under the subheadings of head and neck reconstruction, cleft lip and palate, craniomaxillofacial surgery, facial palsy, facial trauma, and aesthetic surgery. Most of the evidence presented (86%) is level 4.

[Soft tissue plastic surgery for complications in the skull region]

Tumor resection and trauma may leave devastating defects in the head and neck area complicating and preventing patient rehabilitation; therefore, plastic surgery methods are required which are able to prevent further complications and provide efficient functional and aesthetic reconstruction. In this review article typical cases and the interdisciplinary management of plastic surgery are presented.