Morphologic Analysis of the Carpal Tunnel and Median Nerve Following Open and Endoscopic Carpal Tunnel Release.

Background: Endoscopic carpal tunnel release (ECTR) has purported advantages over open release such as reduced intraoperative dissection and trauma and more rapid recovery. Endoscopic carpal tunnel release has been shown to have comparable outcomes to open release, but open release is considered easier and safer to perform. Previous studies have demonstrated an increase in carpal tunnel volume, regardless of the technique used. However, the mechanism by which this volumetric increase occurs has been debated. Our study will determine through magnetic resonance imaging (MRI) analysis the morphologic changes that occur in both open carpal tunnel release (OCTR) and ECTR, thereby clarifying any morphologic differences that occur as a result of the 2 operative techniques. We hypothesize that there will be no morphologic differences between the 2 techniques. Methods: This was a prospective study to compare the postoperative anatomy of both techniques with MRI. Nineteen patients with clinical and nerve conduction study-confirmed carpal tunnel syndrome underwent either open or endoscopic release. Magnetic resonance imaging was performed preoperatively and 6 months postoperatively in all patients to examine the volume of the carpal tunnel, transverse distance, anteroposterior (AP) distance, divergence of tendons, and Guyon's canal transverse and AP distance. Results: There was no significant difference in the postoperative morphology of the carpal tunnel and median nerve between OCTR and ECTR at 6-month follow-up on MRI. Conclusion: We conclude that there are no morphologic differences in OCTR and ECTR. It is an increase in the AP dimension that appears to be responsible for the increase in the volume of the carpal tunnel.

Use of Arterial Grafts in Hypothenar Hammer Syndrome: Application of Perforator Flap Anatomy.

BACKGROUND: Hypothenar hammer syndrome (HHS) is traditionally treated with venous bypass grafting, but controversy has arisen as arterial grafts have become more available. METHODS: A retrospective review of all patients undergoing ulnar artery bypass grafting for HHS with an arterial graft from 2008 to 2017 was performed. We also review the literature for patency rates and discuss the scenarios that favor different graft choices. RESULTS: Six patients were included in our series. Five had primary surgery and 1 had revision surgery for HHS. Five arterial grafts were from the deep inferior epigastric artery and 1 was from the lateral circumflex femoral artery. The proximal anastomotic site was the ulnar artery for all: n = 6. The distal anastomosis site was the palmar arch and common digital artery (CDA) of the ring/small finger and CDA of the middle/ring finger: n = 3; the palmar arch and the CDA of the ring/small finger: n = 3. All patients were symptom-free at follow-up and had a patent ulnar artery on Allen's testing or angiogram. CONCLUSION: Patency rates of arterial grafts for HHS appear to be excellent and this small series and may offer an alternative to traditional venous grafts and end-to-end arterial anastomoses. We suggest using arterial perforator grafts from free flap donor sites. These have well-described anatomy, are easily harvested, and carry minimal donor site morbidity. Lateral circumflex femoral artery graft is favored in patients requiring a single distal anastomosis, who have a ventral hernia, or who are obese. Deep inferior epigastric artery graft is preferred when multiple distal targets or versatile configurations are needed, in thin patients, or in female patients.

HISTORIQUE: Le syndrome du marteau hypothénarien (SMH) est généralement traité par un pontage veineux par greffe, mais une controverse sévit depuis que les greffes artérielles sont plus accessibles. MÉTHODOLOGIE: Les chercheurs ont procédé à une analyse rétrospective de tous les patients qui avaient subi un pontage de l'artère ulnaire par greffe pour traiter un SMH entre 2008 et 2017. Ils ont également fouillé les publications pour déterminer le taux de perméabilité des greffons et tenir compte des scénarios qui favorisent divers types de greffes. RÉSULTATS: Six patients ont fait partie de la série. Cinq avaient subi une opération primaire et un, une reprise de l'opération pour traiter un SMH. Cinq greffes artérielles provenaient de l'artère épigastrique inférieure profonde (AÉIP) et une, de l'artère circonflexe latérale de la cuisse (ACLC). Dans tous les cas (n=6), l'artère ulnaire était le foyer anastomotique proximal. Le foyer anastomotique distal était l'arcade palmaire et l'artère digitale commune (ADC) de l'annulaire et de l'auriculaire et l'ADC du majeur et de l'annulaire (n=3) ou l'arcade palmaire et l'ADC de l'annulaire et de l'auriculaire (n=3). Tous les patients étaient asymptomatiques au suivi et avaient une artère ulnaire perméable au test d'Allen ou à l'angiogramme. CONCLUSION: Le taux de perméabilité des greffes artérielles pour traiter le SMH semble excellent. Cette petite série peut ouvrir la voie à une autre solution que les greffes veineuses classiques et les anastomoses artérielles de bout en bout. Les chercheurs proposent d'utiliser des greffes de l'artère du perforateur provenant de foyers de lambeau libre d'un donneur. Leur anatomie est bien établie, les lambeaux sont faciles à prélever et ils entraînent une morbidité minime au site du donneur. La greffe de l'ACLC est privilégiée chez les patients qui ont besoin d'une anastomose distale simple, qui ont une hernie ventrale ou qui sont obèses. La greffe de l'AÉIP est favorisée lorsque de multiples cibles distales ou que des configurations polyvalentes sont nécessaires, que les patients sont minces ou qu'il s'agit de femmes.

Donor Site Scar Preference in Patients Requiring Free Flap Reconstruction.

INTRODUCTION: In traumatic reconstruction, surgeons frequently harvest flaps from donor sites that they are comfortable performing and with favourable tissue characteristics without determining the patients preferred site. The study's goal was to determine participants free flap donor site preference based on aesthetics as it relates to the size of the defect being reconstructed. METHODOLOGY: Participants were asked to imagine that they were in a trauma that resulted in a wound of variable sizes. They were presented with a selection of common donor site scars produced from harvesting small, medium, and large free flaps. They were instructed to rank the donor sites in order of preference and score each donor site of 10. RESULTS: Two hundred eighty-seven participants (mean age: 28, female: 62%) completed the survey. For small reconstructions, the preferred donor site scars were on the leg or back compared to arm or abdomen. For medium size reconstructions, scars on the back and upper thigh were preferred over scars on the abdomen and anterior thigh. In small and medium reconstructions, the midline abdominal scar scored significantly lower than other donor sites. Participants preferred donor sites on the back, the thigh, and lower abdomen for large reconstructions. CONCLUSION: Participants preferred back, thigh, and hip locations perhaps relating to the ability to conceal these scars under clothing. If multiple flaps sites could be harvested, providing options to trauma patients undergoing free tissue transfer may result in increased satisfaction.

INTRODUCTION: Lors des reconstructions traumatiques, les chirurgiens prélèvent souvent des lambeaux aux sites qu'ils se sentent à l'aise d'utiliser et tiennent compte des caractéristiques favorables des tissus sans déterminer les préférences des patients. L'étude visait à déterminer le site de lambeaux que préféraient les participants en fonction de l'esthétique et de la dimension de l'anomalie à reconstruire. MÉTHODOLOGIE: Les participants ont été invités à imaginer qu'ils avaient été victimes d'un traumatisme responsable de plaies de diverses dimensions. Ils se sont fait présenter une sélection de cicatrices courantes aux sites du donneur, produites après le prélèvement de lambeaux de petite, moyenne ou grande dimension. Ils ont dû classer chacun de ces sites sur une note de dix, par ordre de préférence. RÉSULTATS: Au total, 287 participants (âge moyen de 28 ans, 62 % de femmes) ont participé au sondage. Pour les petites reconstructions, la jambe ou le dos était le site privilégié des cicatrices plutôt que le bras ou l'abdomen. Pour les reconstructions moyennes, les cicatrices sur le dos et le haut de la cuisse étaient favorisées à celles de l'abdomen et de la cuisse antérieure. Pour les reconstructions petites et moyennes, la cicatrice abdominale médiane obtenait une note significativement plus faible que les autres. Les participants préféraient le dos, la cuisse et le bas-ventre pour les reconstructions importantes. CONCLUSION: Les participants préfèrent le dos, la cuisse et la hanche, peut-être parce que les cicatrices peuvent alors être dissimulées sous des vêtements. S'il est possible de prélever des lambeaux de multiples sites, le fait de donner des choix aux patients traumatisés qui subissent un transfert de tissus libres pourrait engendrer une plus grande satisfaction.

Arterialization of the Venous System for Acute and Chronic Ischemia of the Hand: A Case Series With Prospective Duplex Ultrasound Assessment.

Background: Ischemia of the hand is a debilitating condition. In many cases, the cause of ischemia is diffuse atherosclerosis with no distal vessels available for bypass. In these situations, options are limited to restore perfusion, and there is a potential role for arterialization of the venous system to relieve ischemic pain and avoid amputation. Methods: This is a retrospective review of all patients at our institution who underwent arterialization of the venous system between 2010 and 2014 by 4 surgeons for acute or chronic ischemia of the upper extremity not amenable to bypass procedures. Indications, preoperative and postoperative findings, and the requirement for future digital amputations were recorded. The patients were then evaluated prospectively for the patency of arteriovenous anastomosis and the pattern of perfusion by duplex ultrasound studies. Results: Eight patients with 10 upper extremities underwent arterialization of the venous system. All patients with chronic ischemia went on to heal their ischemic ulcerations with relief of rest pain and avoided amputation. Eight upper extremities had arterial Doppler and duplex ultrasound signals showing arterialized dorsal veins demonstrating flow from the dorsal veins heading volar via the intrinsic compartments into the digital arteries. Conclusions: This study illustrates the successful use of arterialization of the venous system of the hand in both acute and chronic hand ischemia. It reports on prospective imaging and duplex ultrasound studies confirming patency of the anastomosis and objective evidence of distal arterial flow. Based on our experience, we believe that arterialization of the venous system may provide an effective salvage option in the setting where no distal bypass is available.

Canadian Plastic Surgery Resident Work Hour Restrictions: Practices and Perceptions of Residents and Program Directors.

BACKGROUND: The impact of resident work hour restrictions on training and patient care remains a highly controversial topic, and to date, there lacks a formal assessment as it pertains to Canadian plastic surgery residents. OBJECTIVE: To characterize the work hour profile of Canadian plastic surgery residents and assess the perspectives of residents and program directors regarding work hour restrictions related to surgical competency, resident wellness, and patient safety. METHODS: An anonymous online survey developed by the authors was sent to all Canadian plastic surgery residents and program directors. Basic summary statistics were calculated. RESULTS: Eighty (53%) residents and 10 (77%) program directors responded. Residents reported working an average of 73 hours in hospital per week with 8 call shifts per month and sleep 4.7 hours/night while on call. Most residents (88%) reported averaging 0 post-call days off per month and 61% will work post-call without any sleep. The majority want the option of working post-call (63%) and oppose an 80-hour weekly maximum (77%). Surgical and medical errors attributed to post-call fatigue were self-reported by 26% and 49% of residents, respectively. Residents and program directors expressed concern about the ability to master surgical skills without working post-call. CONCLUSIONS: The majority of respondents oppose duty hour restrictions. The reason is likely multifactorial, including the desire of residents to meet perceived expectations and to master their surgical skills while supervised. If duty hour restrictions are aggressively implemented, many respondents feel that an increased duration of training may be necessary.

HISTORIQUE: L'effet des restrictions des heures de travail des résidents sur la formation et les soins aux patients est un sujet très controversé. Jusqu'à présent, il n'y a pas d'évaluations officielles de cette réalité chez les résidents canadiens en chirurgie plastique. OBJECTIF: Caractériser le profil des heures de travail des résidents canadiens en chirurgie plastique et évaluer les points de vue des résidents et des directeurs de programme à l'égard de l'effet des restrictions des heures de travail sur la compétence chirurgicale, le bien-être des résidents et la sécurité des patients. MÉTHODOLOGIE: Les auteurs ont préparé un sondage anonyme en ligne qu'ils ont transmis à tous les résidents et les directeurs de programme en chirurgie plastique au Canada. Ils ont synthétisé les statistiques de base. RÉSULTATS: Au total, 80 résidents (53 %) et dix directeurs de programme (77 %) ont répondu au sondage. Les résidents ont déclaré faire une moyenne de 73 heures de travail hospitalier par semaine, faire huit quarts de garde par mois et dormir 4,7 heures par nuit lorsqu'ils sont sur appel. La plupart d'entre eux (88 %) déclarent une moyenne de 0 journée de congé après une garde, et 61 % travaillent ensuite sans avoir dormi. La majorité désire pouvoir travailler après une garde (63 %) et s'oppose à un maximum hebdomadaire de 80 heures (77 %). Par ailleurs, 26 % des résidents précisent avoir fait des erreurs chirurgicales et 49 %, des erreurs médicales qu'ils attribuent à la fatigue accumulée après une garde. Les résidents et les directeurs de programme s'inquiètent de la capacité des résidents à maîtriser les habiletés chirurgicales s'ils ne travaillent pas après les gardes. CONCLUSIONS: La majorité des répondants s'opposent aux restrictions des heures de garde. La raison est probablement multifactorielle, y compris le fait que les résidents souhaitent répondre aux attentes perçues et maîtriser leurs habiletés chirurgicales pendant qu'ils sont sous supervision. Si les restrictions des heures de garde étaient vigoureusement adoptées, de nombreux répondants croient qu'il faudrait allonger la formation.

USE of arterialized saphenous vein venous flow-through flaps as a temporizing measure for hand salvage in contaminated wounds presenting with limb ischemia: A case series.

BACKGROUND: Vascular injuries resulting in limb ischemia are traditionally treated acutely with autologous or prosthetic bypass grafts. Traumatic contaminated injuries with soft tissue and vascular segmental loss are challenging as prosthetic bypasses are at risk of erosion, infection, and occlusion; and autologous bypasses are at risk of desiccation, blow-out, infection, and clotting. We propose a novel approach to these injuries by using arterialized saphenous vein venous flow-through free flaps (S-VFTF) as an autologous bypass, and present the results of its application in a series of cases. METHODS: Spanning 2008 to 2015, four patients presenting with large contaminated crush/avulsion wounds with vascular injury underwent hand revascularization with S-VFTF, allowing the contaminated wounds to be serially debrided. Definitive soft tissue reconstruction was performed once the wound was considered clean. The S-VFTF skin paddle was de-epithelialized and the soft tissue defect covered with a free latissimus dorsi flap or a rectus abdominis myocutaneous flap. RESULTS: All ischemic limbs were successfully reperfused and there were no take backs for perfusion issues. All S-VFTF remained patent at discharge and final follow-up. No partial or complete finger/hand amputations were required. All definitive coverage free flap survived with no complications. CONCLUSION: The two-stage reconstruction presented may help reconstructive and vascular surgeons consider alternatives to traditional vascular reconstruction methods. This technique avoids an exposed vascular graft in an extensively contaminated open wound. It allows the surgeon to perform thorough and sufficient debridement of the wound, preventing definitive reconstruction in a not yet declared zone of injury.

Analgesic Consumption Following Outpatient Carpal Tunnel Release.

PURPOSE: Few studies have examined the consumption of prescribed opioid medications after elective outpatient surgery. A better understanding of opioid consumption after elective upper-extremity surgery may lead to improved prescribing practices, decreased costs, and less leftover medication available for potential misuse. The goal of this study was to evaluate pain control and quantify the amount of leftover pain medication after outpatient carpal tunnel release. METHODS: We performed a prospective study of patients scheduled for outpatient carpal tunnel surgery. All patients had failed nonsurgical treatment and had an electromyelogram/nerve conduction study confirming the clinical diagnosis. All patients were encouraged to remove the dressing on the first postoperative day. A total of 56 patients were initially enrolled in the study; 7 did not meet the inclusion criteria, which left 49 patients who completed the study. Average age was 57 years; 66% of patients were female. Information collected included analgesic prescribed, number of tablets consumed, and number of tablets remaining. Use of postoperative orthoses, complications, use of other analgesic medications, and reasons for not taking the prescribed analgesics were recorded. RESULTS: Paracetamol with codeine and paracetamol with tramadol accounted for all prescriptions. Patients most frequently were given a prescription for 40 tablets. Average number of tablets consumed was 10 (range, 0-40 tablets). More than half of patients consumed fewer than 2 tablets. The average number of postoperative days of analgesic consumption was 2 (range, 0-7 days). Overall 1,531 tablets were leftover from the entire cohort. CONCLUSIONS: This study demonstrates that excess prescription analgesics are being prescribed after carpal tunnel surgery. TYPE OF STUDY/LEVEL OF EVIDENCE: Therapeutic IV.

Radiographic interpretation of carpometacarpal arthroplasty: correlation between radiographic loosening and clinical outcome.

OBJECTIVE: To assess the radiographic appearance and interpretation of loosening in patients following first carpometacarpal joint pyrohemisphere arthroplasty. MATERIALS AND METHODS: A retrospective review over a 6-year period was performed identifying patients with first carpometacarpal pyrohemisphere implants. All postoperative radiographs were reviewed and compared with clinical information. Loosening was defined as greater than 1 mm of periprosthetic lucency or increasing lucency on serial studies. Adverse clinical outcome was defined as infection, complex regional pain syndrome, subluxation or an inability to return to activities of daily living. Statistical analysis included Cohen's Kappa coefficient to measure inter-reader agreement for radiographic interpretation and the agreement between radiographic loosening and an undesired or adverse clinical outcome. RESULTS: Thirty-one implants in 26 patients were reviewed. A total of 73 postoperative radiographs were reviewed. The mean age of the study subjects was 58 years. The mean radiographic follow-up was 13 months (range: 1-56). All arthroplasties were performed for osteoarthritis. Only one repeat surgery was performed. There was good agreement amongst readers with regard to radiographic interpretation, but the strength of agreement between radiographic loosening and adverse clinical outcome was poor. The sensitivity of radiography in predicting an adverse clinical outcome was 63%, specificity 65%, positive predictive value 39%, and negative predictive value 83%. CONCLUSION: Although radiography may be useful in the correct clinical context, it should not be utilized as the sole predictor of adverse clinical outcomes following carpometacarpal arthroplasty.

The proximal superficial femoral artery perforator flap: Anatomic study and clinical cases.

BACKGROUND: The upper thigh has provided multiple new soft tissue free flaps in recent decades, including the anterolateral thigh, anteromedial thigh, transverse upper gracilis, the profunda artery perforator, and superficial circumflex iliac perforator flaps. The purpose of this study is to describe a new, reliable free flap option in the upper thigh: the proximal superficial femoral artery perforator (p-SFAP) flap. METHODS: A cadaveric dissection study was performed to confirm clinical landmarks and evaluate pedicle characteristics. A retrospective review of patients who have received a p-SFAP free flap and surgical technique are described in detail. Eight patients (aged 27-85 years) underwent reconstruction with the p-SFAP flap involving six upper and two lower extremity defects. RESULTS: A consistent pedicle 6 to 8 cm in length was identified in all cadaveric and clinical limbs, emerging from under the lateral aspect of the sartorius muscle and entering the flap approximately 10 cm inferior and 4 cm medial to the anterior superior iliac spine. The perforator took origin off of the superficial femoral artery and femoral vein in all clinical cases. Arterial and venous diameters were 1.2-1.5 mm and 2.0-2.5 mm, respectively. There was one occurrence of partial flap necrosis and one case of complete flap loss. CONCLUSIONS: The p-SFAP flap represents a new, clinically relevant addition to the armamentarium of the reconstructive microsurgeon for use in small to medium sized defects. It can be harvested as a free flap and may have utility as a pedicled flap for groin and perineal reconstruction.

Cosmetic surgery training in Canadian plastic surgery residencies: are we training competent surgeons?

BACKGROUND: With the demand for cosmetic surgery continuing to rise, it is necessary to reevaluate the current state of cosmetic surgery training during plastic surgery residency. An evaluation of cosmetic surgery training in US plastic surgery residency programs in 2006 identified several areas for improvement, resulting in changes to both the duration and content of training. OBJECTIVES: The authors assess the current state of cosmetic surgery training in Canadian plastic surgery residency programs. METHODS: A paper survey of all graduating Canadian plastic surgery residents eligible to complete the 2009 Royal College of Physicians and Surgeons of Canada fellowship examinations was performed (N = 29). The survey was conducted primarily at the Canadian Plastic Surgery Review Course in February 2009, with surveys collected from absent residents by e-mail within 1 month after the course. The survey covered 2 broad areas: (1) specifics regarding resident cosmetic surgery training and (2) confidence and satisfaction associated with this experience. RESULTS: Of the 29 residents surveyed, 28 responded (96%). The majority of Canadian plastic surgery residency programs (75%) have a designated cosmetic surgery rotation, but 90% of respondents felt it has become increasingly difficult to gain exposure to cosmetic procedures as most are performed at private surgery centers. Elective rotations at cosmetic surgery practices and resident cosmetic clinics were considered the most beneficial for cosmetic surgery education. Residents considered cosmetic surgery procedures of the face (such as rhinoplasty and facelift) more challenging, but they had more confidence with breast and body contouring procedures. CONCLUSIONS: Canadian plastic surgery residency programs need to ensure that residents continue to receive comprehensive exposure to both surgical and nonsurgical cosmetic procedures to ensure our specialty's continued leadership in this evolving and highly competitive field. A multidimensional approach utilizing a variety of readily available resources will ensure that the current and future cosmetic surgery educational needs of Canadian plastic surgery residents are met.

Hypercapnic respiratory failure and partial upper airway obstruction during high frequency oscillatory ventilation in an adult burn patient.

PURPOSE: To present a case of severe hypercapnic respiratory failure in an adult burn patient and to describe our clinical problem solving approach during support with an unconventional mode of mechanical ventilation. CLINICAL FEATURES: A 19-yr-old male with smoke inhalation and flame burns to 50% total body surface area was admitted to the Ross Tilley Burn Centre. High frequency oscillatory ventilation (HFOV) was initiated on day three for treatment of severe hypoxemia. By day four, the patient met consensus criteria for acute respiratory distress syndrome. On day nine, alveolar ventilation was severely compromised and was characterized by hypercapnea (PaCO(2) 136 mmHg) and acidosis (pH 7.10). Attempts to improve CO(2) elimination by a decrease in the HFOV oscillatory frequency and an increase in the amplitude pressure failed. An intentional orotracheal tube cuff leak was also ineffective. A 6.0-mm nasotracheal tube was inserted into the supraglottic hypopharynx to palliate presumed expiratory upper airway obstruction. After nasotracheal tube placement, an intentional cuff leak of the orotracheal tube improved ventilation (PaCO(2) 81 mmHg) and relieved the acidosis (pH 7.30). The improvement in ventilation (with normal oxygen saturation) was sustained until the patient's death from multiple organ dysfunction four days later. CONCLUSION: During HFOV in burn patients, postresuscitation edema of the supraglottic upper airway may cause expiratory upper airway obstruction. The insertion of a nasotracheal tube, combined with an intentional orotracheal cuff leak may improve alveolar ventilation during HFOV in such patients.