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.

Interdisciplinary consensus statements on imaging of scapholunate joint instability.

OBJECTIVES: The purpose of this agreement was to establish evidence-based consensus statements on imaging of scapholunate joint (SLJ) instability by an expert group using the Delphi technique. METHODS: Nineteen hand surgeons developed a preliminary list of questions on SLJ instability. Radiologists created statements based on the literature and the authors' clinical experience. Questions and statements were revised during three iterative Delphi rounds. Delphi panellists consisted of twenty-seven musculoskeletal radiologists. The panellists scored their degree of agreement to each statement on an eleven-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 panellists. RESULTS: Ten of fifteen statements achieved group consensus in the second Delphi round. The remaining five statements achieved group consensus in the third Delphi round. It was agreed that dorsopalmar and lateral radiographs should be acquired as routine imaging work-up in patients with suspected SLJ instability. Radiographic stress views and dynamic fluoroscopy allow accurate diagnosis of dynamic SLJ instability. MR arthrography and CT arthrography are accurate for detecting scapholunate interosseous ligament tears and articular cartilage defects. Ultrasonography and MRI can delineate most extrinsic carpal ligaments, although validated scientific evidence on accurate differentiation between partially or completely torn or incompetent ligaments is not available. CONCLUSIONS: Delphi-based agreements suggest that standardized radiographs, radiographic stress views, dynamic fluoroscopy, MR arthrography and CT arthrography are the most useful and accurate imaging techniques for the work-up of SLJ instability. KEY POINTS: • Dorsopalmar and lateral wrist radiographs remain the basic imaging modality for routine imaging work-up in patients with suspected scapholunate joint instability. • Radiographic stress views and dynamic fluoroscopy of the wrist allow accurate diagnosis of dynamic scapholunate joint instability. • Wrist MR arthrography and CT arthrography are accurate for determination of scapholunate interosseous ligament tears and cartilage defects.

Severe Crush Injury to the Forearm and Hand: The Role of Microsurgery.

The main goals of treating severe crush injuries are debriding away devitalized tissue and filling any resultant dead space with vascularized tissue. In the authors' experience, the most ideal methods for soft tissue coverage in treating crush injuries are the iliac flap, the adipofascial lateral arm flap, and the gracilis flap. Accompanying bone defects respond very well to free corticoperiosteal flaps. Digital defects often require the use of complete or subtotal toe transfer to avoid amputation and restore function to the hand.

Foot web free flaps for single-stage reconstruction of hand webs.

PURPOSE: To present a method for reconstructing the digital web in posttraumatic defects using a free tissue transfer of the web from the foot and to present the functional and aesthetic results. METHODS: Nine web free flaps were performed; 8 were used to reconstruct posttraumatic web losses and 1 was used to reconstruct a defect resulting from to infection. All cases involved the first (3) or second (6) webs of the hand. Web flaps were taken from the foot first web (2 patients), from the second (6 cases), and from the third (1 case) in a patient with congenital syndactyly of second foot web space. The donor site was managed by skin grafting from the instep (1 case), creation of a syndactyly (7 cases), or both (1 case). RESULTS: All flaps survived without complications. Finger abduction and flexion-extension were similar to the contralateral side. No functional limitations, pain, or contracture were reported. One donor site healed with hypertrophic scars; otherwise, no donor site complications occurred. On a visual analog scale (0-10), the patient assessed appearance of the hand and the donor foot as 9.0 and 9.0, respectively, on average. One web was not well-positioned in the first operation and required revision. CONCLUSIONS: The foot web free flap reconstructs the hand web by replacing it with a similar functional subunit rather than attempting to recreate the complex geometry, and allows for full function and excellent appearance of the hand. TYPE OF STUDY/LEVEL OF EVIDENCE: Therapeutic IV.

Arthroscopic assessment of intraarticular distal radius fractures--results of minimally invasive fixation.

BACKGROUND: For many years, wrist arthroscopy has been used to diagnose and treat soft tissue lesions and to restore anatomic articular surface alignment in intraarticular fractures. However, there are no publications providing clear and precise indications for wrist arthroscopy in distal radius fractures. The aim of the study was to analyse factors influencing the outcomes of intraarticular distal radius fracture treatment with K-wire fixation under arthroscopic guidance in AO B1 and C1 type fractures. MATERIAL AND METHOD: A group of 26 patients (27 wrists) following an arthroscopic procedure (ARTR group) was the prospective component and 27 patients (27 wrists) following a non-arthroscopic procedure (OP group) constituted the retrospective part of the trial. Both groups consisted only of patients with B1 and C1 type fractures (10 and 17, respectively) according to the AO classification. RESULTS: In the ARTR group, there was a marked (statistically significant) difference between radiologically and arthroscopically assessed displacement. This underestimation of displacement was higher in B1 than C1 type fractures (statistically significant difference). Numerous associated injuries were identified, such as carpal bone cartilage injuries (85.19%), TFCC injury (59.26%) and SL ligament injuries (40.74%). Loose bodies were detected in 66.7% of the patients. In B1 type fractures, the most common ligamentous injury was a SL ligament lesion (50%), while in C1 fractures it was a TFCC lesion (70.59%). Comparing both groups (ARTR and OP), better clinical outcomes were observed in the ARTR group (though not statistically significant), with the most marked differences noted with regard to B1 type fractures. CONCLUSIONS: In B1 and C1 type intraarticular distal radius fractures, displacement visible during arthroscopy was greater than that seen on primary radiological assessment. In B1 type fractures, the difference between radiological and arthroscopic evaluation of displacement was more marked than in C1 fractures. It means that B1 type fractures can be highly "misleading", because their radiological pattern suggested little displacement, while actual displacement was more pronounced. On the basis of our results, it might be concluded that wrist arthroscopy could become a standard, routine procedure in B1 type fractures. In C1 type fractures, the method of treatment would depend on the surgeon's preferences.