Interdisciplinary consensus statements on imaging of DRUJ instability and TFCC injuries.

OBJECTIVES: The purpose of this agreement was to establish evidence-based consensus statements on imaging of distal radioulnar joint (DRUJ) instability and triangular fibrocartilage complex (TFCC) injuries by an expert group using the Delphi technique. METHODS: Nineteen hand surgeons developed a preliminary list of questions on DRUJ instability and TFCC injuries. Radiologists created statements based on the literature and the authors' clinical experience. Questions and statements were revised during three iterative Delphi rounds. Delphi panelists consisted of twenty-seven musculoskeletal radiologists. The panelists scored their degree of agreement to each statement on an 11-item numeric scale. Scores of "0," "5," and "10" reflected complete disagreement, indeterminate agreement, and complete agreement, respectively. Group consensus was defined as a score of "8" or higher for 80% or more of the panelists. RESULTS: Three of fourteen statements achieved group consensus in the first Delphi round and ten statements achieved group consensus in the second Delphi round. The third and final Delphi round was limited to the one question that did not achieve group consensus in the previous rounds. CONCLUSIONS: Delphi-based agreements suggest that CT with static axial slices in neutral rotation, pronation, and supination is the most useful and accurate imaging technique for the work-up of DRUJ instability. MRI is the most valuable technique in the diagnosis of TFCC lesions. The main indication for MR arthrography and CT arthrography are Palmer 1B foveal lesions of the TFCC. CLINICAL RELEVANCE STATEMENT: MRI is the method of choice for assessing TFCC lesions, with higher accuracy for central than peripheral abnormalities. The main indication for MR arthrography is the evaluation of TFCC foveal insertion lesions and peripheral non-Palmer injuries. KEY POINTS: • Conventional radiography should be the initial imaging technique in the assessment of DRUJ instability. CT with static axial slices in neutral rotation, pronation, and supination is the most accurate method for evaluating DRUJ instability. • MRI is the most useful technique in diagnosing soft-tissue injuries causing DRUJ instability, especially TFCC lesions. • The main indications for MR arthrography and CT arthrography are foveal lesions of the TFCC.

Benign subcutaneous emphysema: a rare and challenging entity a case report and review of the literature.

We report the case of a craftsman who developed a rapidly progressive subcutaneous emphysema of his forearm after a minor stab injury into the palm of his hand. Based on our case report we discuss differential diagnosis and management of acute subcutaneous emphysema.

The Microvascular Peroneal Artery Perforator Flap as a "Lifeboat" for Pedicled Flaps.

Pedicled perforator flaps have expanded reconstructive options in extremity reconstruction. Despite preoperative mapping, intraoperative findings may require microvascular tissue transfer when no adequate perforators can be found. The free peroneal artery perforator flap may serve as a reliable back-up plan in small defects. METHODS: In 16 patients with small soft tissue defects on the upper and lower extremities, perforator-based propeller flaps were planned. The handheld Doppler device was used to localize potential perforators for a propeller flap in close proximity to the defect. Perforators of the proximal peroneal artery were also marked to allow conversion to microvascular tissue transfer. RESULTS: In 6 cases, no adequate perforators were found intraoperatively. In 4 patients, the peroneal artery perforator flap was harvested and transferred. The pedicle length did not exceed 4 cm. No flap loss occurred. CONCLUSIONS: When no adequate perforator capable of nourishing a propeller flap can be found intraoperatively, the free peroneal artery flap is a good option to reconstruct small soft tissue defects in the distal extremities. The short vascular pedicle is less ideal in cases with a large zone of injury requiring a more distant site of anastomosis or when recipient vessels are located in deeper tissue planes.

Acute A4 Pulley Reconstruction with a First Extensor Compartment Onlay Graft.

BACKGROUND: The integrity of the flexor tendon pulley apparatus is crucial for unimpaired function of the digits. Although secondary reconstruction is an established procedure in multi-pulley injuries, acute reconstruction of isolated, closed pulley ruptures is a rare occurrence. There are 3 factors influencing the functional outcome of a reconstruction: gapping distance between tendon and bone (E-space), bulkiness of the reconstruction, and stability. As direct repair is rarely done, grafts are used to reinforce the pulley. An advantage of the first extensor retinaculum graft is the synovial coating providing the possibility to be used both as a direct graft with synovial coating or as an onlay graft after removal of the synovia when the native synovial layer is present. METHODS: A graft from the first dorsal extensor compartment is used as an onlay graft to reinforce the sutured A4 pulley. This technique allows reconstruction of the original dimensions of the pulley system while stability is ensured by anchoring the onlay graft to the bony insertions of the pulley. RESULTS: Anatomical reconstruction can be achieved with this method. The measured E-space remained 0 mm throughout the recovery, while the graft incorporated as a slim reinforcement of the pulley, displaying no bulkiness. CONCLUSIONS: The ideal reconstruction should provide synovial coating and sufficient strength with minimal bulk. Early reconstruction using an onlay graft offers these options. The native synovial lining is preserved and the graft is used to reinforce the pulley.

Kirschner wire fixations for scapholunate dissociation: a cadaveric, biomechanical study.

PURPOSE: To compare 5 different Kirschner wire fixation techniques in terms of the failure loads seen as scapholunate (SL) dissociation in a cadaveric, biomechanical study. METHODS: 10 fresh-frozen, finger-amputated wrists with sectioned SL ligaments from 3 male and 2 female cadavers were tested. The change of SL angle, SL dissociation, and the load to failure of the 5 different Kirschner wire fixation techniques (using 1.4-mm Kirschner wires) were compared using an axial loading testing machine. The techniques were: (1) SL fixation (using one wire), (2) SL fixation (using 2 wires), (3) SL and scaphocapitate (SC) fixation, (4) SL, SC, and capitolunate (CL) fixation, and (5) CL fixation alone. RESULTS: There was no significant difference between SL fixations using one or 2 wires. The force for SL dissociation was significantly greater in the SL-SC fixation than the SL fixation using one wire (p=0.003). The SL-SC-CL fixation was not significantly stronger than the SL-SC fixation. CONCLUSION: The SL-SC fixation achieved adequate stabilisation of both carpal rows with minimal biological impairment.

Palmar and dorsal fixed-angle plates in AO C-type fractures of the distal radius: is there an advantage of palmar plates in the long term?

BACKGROUND: Current surgical approaches to the distal radius include dorsal and palmar plate fixation. While palmar plates have gained widespread popularity, few reports have provided data on long term clinical outcomes in comparison. This paper reports the result of a randomised clinical study comparing dorsal Pi plates and palmar, angle-stable plates for treatment of comminuted, intraarticular fractures of the distal radius over the course of twelve months. METHODS: 42 patients with unilateral, intraarticular fractures of the distal radius were included and randomised to 2 groups, 22 were treated with a palmar plate, 20 received a dorsal Pi-plate. Results were evaluated after 6 weeks, 3, 6 and 12 months postoperatively focussing on functional recovery as well as radiological results. RESULTS: The palmar plate group demonstrated significantly better results regarding range of motion and grip strength over the course of 12 months. While a comparable increase in function was observed in both groups, the better results from the early postoperative period in the palmar plate group prevailed over the whole course. Radiological results showed a significantly increased palmar tilt and carpal sag in dorsal plates, with other radiological parameters being comparable. Pain levels were decreased in dorsal plates after hardware removal and failed to show significant differences after 12 months. However, complications such as tendon ruptures were more frequent in the dorsal plate group. CONCLUSIONS: Functional advantage of palmar plates gained within the first 6 weeks prevails over the course of a year. Both groups demonstrate further gradual increase of function after 6 months, although dorsal plates did not catch up completely. Improved early postoperative function seems to be the cornerstone for the best possible results. Patients with dorsal plates benefit from hardware removal more than palmar plates in terms of reduction of pain levels. The advantage of palmar plates is a faster functional recovery with lower complication rates. This is especially important in the elderly population. Radiological results did not show a superiority of palmar plates over dorsal plates.

The use of beta-tricalcium phosphate bone graft substitute in dorsally plated, comminuted distal radius fractures.

BACKGROUND: Intraarticular distal radius fractures can be treated with many methods. While internal fixation with angle stable implants has become increasingly popular, the use of bone graft substitutes has also been recommended to address comminution zones and thus increase stability. Whether a combination of both methods will improve clinical outcomes was the purpose of the study METHODS: The study was thus conducted as a prospective randomized clinical trial. 39 patients with unilateral, intraarticular fractures of the distal radius were included and randomized to 2 groups, one being treated with internal fixation only, while the second group received an additional bone graft substitute. RESULTS: There was no statistical significance between both groups in functional and radiological results. The occurrence of complications did also not show statistical significance. CONCLUSIONS: No advantage of additional granular bone graft substitutes could be seen in this study. Granular bone graft substitutes do not seem to provide extra stability if dorsal angle stable implants are used. Dorsal plates have considerable complication rates such as extensor tendon ruptures and development of CRPS.

Adequacy of palmaris longus and plantaris tendons for tendon grafting.

PURPOSE: The reconstruction of tendon defects is challenging. The palmaris longus and plantaris tendon are generally considered best for tendon grafting. Only a few studies have examined whether these tendons, when present, meet criteria for successful grafting. The purpose of this study was to evaluate these tendons in regard to adequacy as tendon grafts. METHODS: To evaluate adequacy for grafting, the palmaris longus and plantaris tendons were harvested from 92 arms and legs of 46 cadavers. Macroscopic evaluation and measurements concerning presence, length, and diameter of the tendons were obtained. Criteria for adequacy were a minimum length of 15 cm with diameter of 3 mm or, alternatively, 30 cm with a diameter of 1.5 mm. RESULTS: The palmaris longus tendon was present bilaterally in 36 cases and was absent bilaterally in 4 cases. The plantaris tendon was present bilaterally in 38 cases and absent bilaterally in 4 cases. In 29 cadavers, the palmaris longus tendon did not meet the criteria to be used as a tendon graft. Only in 8 cases were the tendons satisfactory for grafting bilaterally. The plantaris tendon met criteria for grafting in 20 cases bilaterally. In 17 cases, the tendons were considered inadequate bilaterally. CONCLUSIONS: Despite their presence, the palmaris longus and plantaris tendons are adequate for grafting less often than previously thought. In less than 50%, the tendons, although present, would serve as useful grafts. CLINICAL RELEVANCE: Our findings underscore the importance of choosing a second donor site before surgery in case the primarily selected tendon is not found to be suitable.

Breast reduction by liposuction in females.

BACKGROUND: Breast reduction by liposuction alone is an appealing technique that has failed to gain widespread acceptance. Despite numerous studies on liposuction, the majority of surgeons remain skeptical. This study aimed to review the indication and limitations of this procedure. METHODS: Two groups of patients that qualify for this procedure can be defined. However, the aesthetic result will be pleasing only for young patients. For elderly patients, liposuction breast reduction will simply achieve a weight reduction of the breast without improving the shape. RESULTS: Universally good liposuction results for breast weight reduction and elevation of the nipple-areolar complex are reported. Improvement in breast shape and correction of ptosis cannot be achieved for elderly patients. Young patients with a preoperatively pleasing breast shape can expect a preservation of the shape with the benefit of minimal scarring. CONCLUSION: Liposuction breast reduction is appealing due to selective removal of fat, ease of the procedure, and minimal scarring. The main disadvantage is that a correction of shape and ptosis is not possible with liposuction, and only young patients can expect an aesthetically pleasing result. Elderly patients may benefit from faster recovery times, a less invasive procedure, and low costs. The application of a new technique to a cancer-prone organ represents a potentially serious medicolegal issue because follow-up imaging may be impaired and a possible spread of cancer cells cannot be ruled out. Despite its technical appeal, breast reduction by liposuction alone mandates a cautious approach.

Reconstruction of soft tissue defects of the Achilles tendon with rotation flaps, pedicled propeller flaps and free perforator flaps.

INTRODUCTION: Soft tissue defects exposing the Achilles tendon are challenging. Local perforator flaps represent a valuable option gaining increasing popularity. Despite preoperative planning an adequate perforator cannot always be found intraoperatively. The free peroneal artery perforator flap can serve as a back-up option limiting the donor site morbidity to the same extremity without sacrificing major vessels or nerves. METHODS: Nine patients with soft tissue defects exposing the Achilles tendon were treated with local perforator flaps, seven were scheduled for 180° propeller flap coverage after Doppler-ultrasound examination. However, in two patients (22%) no adequate perforators were found intraoperatively. As the perforators for the free peroneal artery perforator flap were routinely mapped out, this flap was harvested for microsurgical reconstruction. RESULTS: One patient with a 180° propeller flap developed a partial flap necrosis, another patient developed superficial epidermolysis, both requiring skingrafting. no complications were seen with free tissue transfer. CONCLUSION: Pedicled perforator flaps as propeller flaps add options to the armamentarium of microsurgeons. Despite thorough preoperative planning the surgeons must be prepared to perform a different method of reconstruction if inadequate vessels are encountered. To limit additional donor site morbidity, local options are preferred. The free peroneal artery perforator flap represents a good option as it matches the original tissue properties closely. The complication rate of propeller flaps in this series is tolerable. Propeller flaps should therefore be considered an alternative but not as a replacement of local fasciocutaneous flaps.

Combination of a total free forearm flap and a sensate local flap for preservation of the shoulder girdle in massive, nonreplantable upper extremity injuries.

BACKGROUND: After massive upper extremity injuries, prosthetic use might be complicated by the formation of pressure ulcerations. Especially the coverage with insensate free flaps may predispose the patient for developing chronic ulcerations when using an upper extremity prosthesis. This complication may be reduced when sensate local flaps are used to cover bony prominences. METHODS: A new operative technique is described. RESULTS: Immediate sensate soft tissue coverage improves prosthetic fitting. Successful manipulation of the prosthesis can be quickly achieved with a decreased risk for pressure ulceration. CONCLUSION: This challenging procedure helps to achieve durable and sensate coverage of bony prominences. The use of local sensate tissue to cover bony prominences reduces the risk for pressure ulceration when wearing a prosthesis. Areas where prosthetic use causes only low pressure and shearing forces are adequately covered with free flaps. Immediate sensibility of local flaps allows prosthetic fitting and use as soon as wound healing has occurred. Return to work is thus expedited.

The ageing hand. A study to evaluate the chronological ageing process of the hand.

The rejuvenation of the hand has received increased attention recently. Although many different methods have been advocated, only little is known about the chronological ageing process of the Caucasian hand. A qualitative study was performed to evaluate ageing changes. One hundred and forty-three volunteers were enrolled. Standardised pictures of both hands were obtained and evaluated by one observer in regard to wrinkling pattern, visibility of subcutaneous structures and trophic changes. We found that both males and females showed a distinct progression of the wrinkling pattern. Dorsal veins and age spots increased with age whereas the wrinkle-wrinkle distance decreased. Contrary to common belief, significant joint thickening of the proximal interphalangeal (PIP) joint could not be confirmed. Hand ageing is a three-dimensional process that involves osseous and subcutaneous structures as well as the skin. Despite the increased interest in rejuvenation, a baseline study describing the chronological changes with ageing in the hand is still missing. Our findings will help to define the ageing process in Caucasians.

The 180-degree perforator-based propeller flap for soft tissue coverage of the distal, lower extremity: a new method to achieve reliable coverage of the distal lower extremity with a local, fasciocutaneous perforator flap.

BACKGROUND: Traumatic and nontraumatic defects of the distal third of the tibia are challenging in regard to soft tissue coverage. While local, pedicled fasciocutaneous perforator flaps allow adequate coverage, the donor site often requires skin grafting. When a local perforator flap is designed as a 180-degree propeller flap, an excellent esthetic result and direct closure of the donor site can be achieved, with minimal morbidity. METHODS: Eight patients with defects in the malleolar region were treated with 180-degree propeller flaps based on perforators from the tibial and peroneal vessels. RESULTS: One partial flap loss was encountered in an insulin-dependent diabetic. Partial superficial epidermolysis was encountered in 2 cases and healed without further interventions. No other complications were encountered. All patients returned to full ambulation within 8 weeks. CONCLUSION: The 180-degree propeller flap is an elegant and versatile method to achieve soft tissue coverage with local tissue in defects of the distal tibia. Contrary to other local perforator flaps, this specific design facilitates direct closure of the donor site. As only local, thin tissue is used, no interference with normal shoe wear occurs. Even in older patients, this flap has proven to be a reliable option.

Digital amputation caused by climbing-rope entanglement.

Digital avulsions and amputations are not uncommon in outdoor activities. Rope entanglement is often the cause, though specific descriptions of the mechanism of injury have not been reported. We report a common scenario where entanglement during a fall resulted in an amputation injury. Although any roping activity may cause a loop formation leading to digital entrapment and subsequent amputation injury, activities involving soft and loose ropes may increase the chances of injury. Rope slack is to be avoided to minimize the likelihood of entanglement. This case report describes a digital amputation during an indoor climbing incident and also describes a possible mechanism for such injuries.

Defining the basic aesthetics of the hand.

BACKGROUND: Hand aesthetics have been poorly described because function is the main reason why patients consult a surgeon about their hands. Ideal proportions are based on normal anatomy, which is a prerequisite for aesthetics. METHODS: A literature review was performed. RESULTS: Anatomically correct proportions are, besides adequate soft tissue, the most important aspects of hands considered to be beautiful. The golden proportion may be used to identify suboptimal areas. Extrinsic and intrinsic aging must be distinguished, and therapy should be determined accordingly. CONCLUSION: Hand aesthetics are based on normal anatomy. Knowing this is essential for every surgeon treating hand patients.