Handchirurgie Mikrochirurgie Plastische Chirurgie最新文献

Background: In the event of an advanced rectal carcinoma, an evisceration with rectal amputation may become necessary. The resulting defects, due to their extent, depth, or local tissue damage from previous surgeries and radiation, can in many cases only be closed through free microvascular tissue transfer. In this case series, we demonstrate the successful combination of a musculocutaneous musculus vastus lateralis flap (MVL) with a direct connection to the superior gluteal artery.

Materials and methods: Over a 47-month period, we retrospectively examined 11 cases of patients with dorsal pelvic defects after evisceration and rectal amputation that could not be closed using local or regional means. In cases of extensive defects with deep pararectal wound cavities, all these patients underwent defect coverage through a free myocutaneous MVL flap with a direct vascular anastomosis to the superior gluteal vessels.

Results: The mean defect size was 290.0 cm² (SD: 131.2; range: 200-600 cm²). The mean defect depth was 10.5 cm, necessitating MVL flap reconstruction with an average size of 336.3 cm². Three operative revisions were required due to postoperative bleeding. There were no arterial or venous thromboses, and no flap loss occurred. Only one necrosis of a distal flap tip was observed, which could be corrected secondarily by direct suturing. The case-mix evaluation yielded an average value of 24.251 (SD: 21.699; range: 7.036-65.748) points, emphasizing the complexity of the cases.

Conclusions: Our results indicate that a free microvascular MVL flap is a viable therapeutic option for pararectal defects that cannot be closed by local or regional methods. The superior gluteal artery proves to be a safe and sufficient vascular connection. In combination, even extensive defects can be successfully closed.

Background: The deep circumflex iliac artery (DCIA) perforator flap is an established method to reconstruct osteocutaneous defects. However, the cutaneous perforators come with a great anatomic variability. To deal with this problem, we used a sequential chimeric osteocutaneous free flap for reconstruction.

Patients and methods: A 58-year-old man presented with an open tibial fracture after an avalanche accident resulting in an extended osteocutaneous defect in the lower extremity. The injury required osteocutaneous free flap coverage. We reconstructed the defect with a sequential chimeric osteocutaneous DCIA-perforator-SIEA flap.

Results: The preservation of the ascending branch of the deep circumflex iliac vessels offered us the possibility to effectively cover an extended osteocutaneous defect in the lower extremity with a sequential chimeric osteocutaneous DCIA-perforator-SIEA flap. In our patient, the sequential chimeric osteocutaneous DCIA-perforator-SIEA flap healed without complications. A small hernia developed at the inguinal donor site area, but it healed without further complications after surgical treatment. The patient regained an adequate function and returned to daily life and physical exercise.

Conclusion: While preparing the DCIA-perforator free flap, it is important to preserve the ascending branch of the deep circumflex iliac vessels and the vessels needed to harvest either a SIEA or SCIP flap.

Background: Secondary lymphoedema (SL) is one of the most common and, at the same time, most significant consequences and complications of modern oncological therapy. Although a thorough patient history and physical examination are sufficient to substantiate a suspicion, it is essential to perform functional imaging of the lymphatic system for a targeted diagnosis and determination of severity. For this purpose, techniques such as MR and ICG lymphography as well as ultra-high-frequency ultrasound examinations have been developed and validated in recent years. The selective use of these techniques has allowed for individualized indications and successful stage-dependent treatment using (super)microsurgical techniques to restore regional lymphatic drainage in the context of intensified conservative therapy.

Method: Systematic review of the literature on the diagnosis and treatment of SL with subsequent analysis and classification of the results into evidence levels according to the Oxford Centre for Evidence-Based Medicine and the GRADE Scale.

Results: The established and validated diagnosis of SL includes imaging (ICG fluorescence lymphography, MR lymphography and Tc-99 functional lymphoscintigraphy) in case of a clinical suspicion and in high-risk patients. Complex physical decongestion therapy (CPE) is superior to physical therapy or compression alone. (Super)microsurgery of SL allows for a postoperative reduction in the frequency of CPE, a reduction of erysipelas rates, a volume reduction of the lymphomatous extremity and, if carried out prophylactically, a lower incidence of SL. Suction-assited lipectomy can produce long-term, stable reductions in circumference and an improvement in quality of life.

Conclusion: Patients with SL benefit from conservative therapy with regular re-evaluation. Patients with a high risk for SL or with clinical deterioration or persistent symptoms under guideline-based conservative therapy can benefit from (super)microsurgical therapy after an individualized functional diagnostic evaluation of the lymphatic system. Excisional dermolipectomies or lympholiposuctions are available and effective for advanced and refractory stages.

The surgical-oncological treatment of pelvic and perineal malignancies is associated with a high complication rate and morbidity for patients. Modern multimodal treatment modalities, such as neoadjuvant radio-chemotherapy for anal or rectal cancer, increase the long-term survival rate while reducing the risk of local recurrence. Simultaneously, the increasing surgical radicality and higher oncological safety with wide resection margins is inevitably associated with larger and, due to radiation, more complex tissue defects in the perineal and sacral parts of the pelvic floor. Therefore, the plastic-surgical reconstruction of complex pelvic-perineal defects following oncological resection remains challenging. The reconstructive armamentarium, and thus the treatment of such defects, is broad and ranges from local, regional and muscle-based flaps to microvascular and perforator-based procedures. While the use of flaps is associated with a significant, well-documented reduction in postoperative complications compared to primary closure, there is still a lack of reliable data directly comparing the postoperative results of different reconstructive approaches. Additionaly, the current data shows that the quality of life of these patients is rarely recorded in a standardised manner. In a consensus workshop at the 44^th annual meeting of the German-speaking Association for Microsurgery on the topic of "Reconstruction of oncological defects in the pelvic-perineal area", the current literature was discussed and recommendations for the reconstruction of complex defects in this area were developed. The aim of this workshop was to identify knowledge gaps and establish an expert consensus to ensure and continuously improve the quality of reconstruction in this challenging area. In addition, the importance of the "patient-reported outcome measures" in pelvic reconstruction was highlighted, and the commitment to its widespread use in the era of value-based healthcare was affirmed.

Rhizarthrosis is one of the most common arthritic changes in the hand, which has led to the development of a large number of surgical methods in recent years. In addition to the traditional resection arthroplasty with tendon suspension or interposition, if needed, thumb saddle joint prostheses are being used more and more frequently. However, these are not an option for all patients such as those with severe osteoporosis, severe nickel allergy, insufficient height of the trapezium or STT osteoarthritis. This study examined whether the traditional surgical methods continue to have their "right to exist" or whether they will be replaced by prostheses. In a retrospective study with prospective data collection, 48 hands of 45 patients diagnosed with rhizarthrosis in stages II and III according to Eaton and Littler were clinically examined 2.5 years after resection arthroplasty/resection-suspension-interposition arthroplasty using flexor carpi radialis (FCR) or abductor pollicis longus (APL) tendon strips in the years 2015-2018. The postoperative outcome was assessed using mobility, grip strength, two-point discrimination, postoperative satisfaction with regard to pain and resilience, as well as the DASH and MHQ questionnaires. There were no significant differences in surgery duration, inability to work, time to full weight-bearing, pain, satisfaction, grip strength and mobility. Regardless of the surgical method used, patients achieved an almost free range of motion in the thumb and wrist as well as age-appropriate hand strength. Pain at rest was rare; 48% were pain-free during exercise. The DASH questionnaire scored 20.2, 13.9 and 22.1 points and the MHQ scored 76.3, 79.3 and 79.4 points. Hence, the traditional surgical techniques showed good postoperative results with high patient satisfaction. "Newer procedures" such as endoprosthesis offer promising results in terms of faster regeneration times. However, this is offset by a longer surgery time and higher material costs, which means that resection arthroplasty represents a long-established procedure with a low potential for complications and a lower revision rate and should continue to be used, especially if there are relative contraindications to an endoprosthesis.

Intraneural lipomas and lipofibromas (also called lipofibromatous hamartomas) are rare, benign tumours occurring in peripheral nerves in the forearm and wrist. They usually present as asymptomatic masses, but if they are large enough, they may cause symptoms of compression neuropathy. Intraneural lipomas and lipofibromas differ with regard to anatomy and clinical behaviour: the former tumour has a well-defined capsule and most commonly occurs within the median nerve in the forearm and wrist. It is diagnosed in the fourth and fifth decades of life and seen more frequently in women. The latter (lipofibroma) has no capsule, is infiltrative in nature, is composed of fatty and fibrous tissue and also most commonly seen in the median nerve. It occurs in a younger age group with no sexual predominance. Due to these differences, these lesions are managed differently 1 2.

Background: The increasing use of thumb carpometacarpal joint prostheses for advanced CMC 1 (carpometacarpal) joint arthritis reflects the success of the latest prosthesis generations, which has been achieved through their improved functional outcomes and lower complication rates. Precise alignment of the prosthesis cup parallel to the proximal joint surface of the trapezium is essential for stability and the prevention of dislocation. This is a challenging surgical step, particularly for surgeons new to this technique. Despite adequate positioning of the guidewire, misplacements of the cup may occur, necessitating intraoperative revision.

Material and methods: This study examined the deviations in cup and guidewire positioning in thumb carpometacarpal joint prosthesis implantations by inexperienced and experienced surgeons through radiological analysis of 65 prostheses.

Results: Both inexperienced and experienced surgeons achieved precise guidewire positioning with mean deviations of<2.2°. Inexperienced surgeons showed significantly larger cup deviations in the dorsopalmar and lateral view (7.6±6.1° and 7.3±5.9°) compared with experienced surgeons (3.6±2.7° and 3.6±2.5°; p=0.012, p=0.017). The deviation of the cup position exhibited by inexperienced surgeons tends to be in the direction opposite to the initial guidewire position (p<0.0038).

Conclusion: The results highlight the current challenges in cup positioning depending on a surgeon's level of experience, questioning the reliability of the current guidewire placement.

The introduction of the new generation of thumb carpometacarpal (CMC I) joint implants for the treatment of CMC I osteoarthritis has significantly broadened the scope of hand surgery in recent years. However, the technical demands of the procedure and the many details that need to be considered require appropriate training and a learning curve. To share experiences with the Touch CMC I prosthesis, we held the first German-speaking CMC I joint prosthetics user meeting in Zurich. After some basic introductory lectures on biomechanics and the principles of prosthetic fitting of the CMC I joint, the various challenges associated with CMC I joint prosthetics were discussed in interactive expert panels. Subsequently, cases were discussed in small groups under expert guidance and the respective conclusions were discussed in plenary. The main results of this symposium are summarised in this manuscript.

Robotic microsurgery is an emerging field in reconstructive surgery, which provides benefits such as improved precision, optimal ergonomics, and reduced tremors. However, only a few robotic platforms are available for performing microsurgical procedures, and successful nerve coaptation is still a challenge. Targeted muscle reinnervation (TMR) is an innovative reconstructive procedure that rewires multiple nerves to remnant stump muscles, thereby reducing neuroma and phantom limb pain and improving the control of bionic prostheses. The precision of surgical techniques is critical in reducing axonal sprouting around the coaptation site to minimise the potential for neuroma formation. This study reports the first use of a microsurgical robotic platform for multiple nerve transfers in a patient undergoing TMR for bionic extremity reconstruction. The Symani robotic platform, combined with external microscope magnification, was successfully used, and precise handling of nerve tissue and coaptation was easily feasible even in anatomically challenging environments. While the precision and stability offered by robotic assistance may be especially useful for nerve surgery, the high economic costs of robotic microsurgery remain a major challenge for current healthcare systems. In conclusion, this study demonstrated the feasibility of using a robotic microsurgical platform for nerve surgery and transfers, where precise handling of tissue is crucial and limited space is available. Future studies will explore the full potential of robotic microsurgery in the future.