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1.
Arch Orthop Trauma Surg ; 143(9): 6001-6010, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37012506

RESUMO

INTRODUCTION: Scaphoid nonunion after failed primary treatment remains challenging particularly when entailed by bone loss, avascular necrosis or deformity. We describe a scaphoid augmentation and fixation technique for cases of recalcitrant nonunion after screw placement by autologous press fit corticocancellous dowel. This study aims to provide reliable data on clinical and radiological outcomes and to contextualize in the face of other treatment options. MATERIAL AND METHODS: The study included 16 patients with recalcitrant nonunion of the scaphoid. All patients received screw removal and scaphoid reconstruction by a dowel shaped non-vascularized corticocancellous bone graft from the iliac crest facilitating packing of the screw channel. Bone union, the scapholunate, radiolunate and intrascaphoidal angles were evaluated on X-ray and CT images, range of motion noted. Additionally grip strength, DASH and Green O'Brien scores were obtained from eight patients. RESULTS: A union rate of 73% was noted after mean follow-up of 54 months. After revisional reconstruction of the scaphoid an extension-flexion rate of 84% of the healthy side was noted while pronation-supination reached 101%. DASH score averaged at 2.9, rest pain on a numeric rating scale was 0.43 with 99% peak grip force of the healthy side. CONCLUSION: In complex cases of revisional scaphoid nonunion after screw placement, the corticocancellous iliac crest pressfit dowel is an option for augmentation and stabilization of the scaphoid by preserving the articular surface. LEVEL OF EVIDENCE: IV, retrospective case series.


Assuntos
Fraturas não Consolidadas , Osso Escafoide , Humanos , Fraturas não Consolidadas/cirurgia , Fraturas não Consolidadas/diagnóstico por imagem , Ílio/transplante , Estudos Retrospectivos , Osso Escafoide/cirurgia , Radiografia , Fixação Interna de Fraturas/métodos , Transplante Ósseo/métodos , Resultado do Tratamento
2.
Arch Orthop Trauma Surg ; 143(7): 4547-4555, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-36705761

RESUMO

INTRODUCTION: Fluctuations in the numbers of patient consultations in hand trauma emergency units are challenging in terms of both scheduling and the provision of sufficient resources. Trauma consultations in general are affected by both temporal and meteorological variables. As the genesis and epidemiology of hand trauma have their own characteristics, this study aimed to identify the influence of temporal and meteorological factors on hand trauma consultations. MATERIALS AND METHODS: All patients treated for hand trauma in our level one trauma center in 2019 were included in the study population and the data were analyzed in retrospect. The daily weather data, including temperature, sunshine duration, precipitation, humidity and wind speed, as well as temporal factors such as time of day, weekday and public holidays were considered and correlated with patient consultations. Gender differences were studied as well. RESULTS: We included 4787 hand trauma patients (66.4% male, mean age 38.4 ± 19.3 years, 31.7% occupational injuries). Significantly more consultations occurred on Saturdays as compared to weekdays (14.8 ± 0.6, n = 52 vs. 13.0 ± 0.2, n = 261; p = 0.028), and fewer occurred on official holidays (11.8 ± 0.5, n = 63 vs. 13.4 ± 0.2, n = 302; p = 0.0047). We found a significant positive correlation between daily consultations, sunshine duration (r = 0.14, p = 0.0056) and the mean temperature (r = 0.20, p < 0.0001); in contrast, a significant negative correlation between daily consultations and humidity (r = - 0.17, p = 0.001) was observed. Furthermore, fewer consultations were seen on days with precipitation (12.7 ± 0.3, n = 219 vs. 13.8 ± 0.3, n = 146; p = 0.009). The variation was considerably stronger in men. CONCLUSIONS: Hand trauma consultations increased with increasing temperatures, duration of sunshine, and decreasing humidity. Peak admissions were seen on Fridays and Saturdays. These findings can assist in predicting days with peak admissions to allocate resources appropriately.


Assuntos
Traumatismos da Mão , Tempo (Meteorologia) , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Traumatismos da Mão/epidemiologia , Traumatismos da Mão/cirurgia , Hospitalização , Temperatura , Centros de Traumatologia
3.
J Reconstr Microsurg ; 39(6): 413-418, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-36377126

RESUMO

BACKGROUND: The anterolateral thigh (ALT) flap is commonly utilized in reconstructive surgery. Preoperative perforator mapping facilitates dissection. Dynamic infrared thermography can be applied to identify ALT perforators. However, its accuracy has not been evaluated in detail before. Therefore, this study aimed to assess the precision of dynamic infrared thermography in ALT perforator localization. METHODS: The survey site was defined as a 25 × 8 cm rectangle on the anterolateral thigh and a coordinate system was established. The area was examined consecutively by dynamic infrared thermography with a FLIR ONE camera after 2-minute fan precooling. Two surgeons then independently performed color duplex ultrasound on the basis of the identified hotpots. RESULTS: Twenty-four healthy subjects were examined. About 74.8% of perforators were musculocutaneous or musculoseptocutaneous. The mean distance between study area center and perforator or hotspot center was 51.8 ± 27.3 and 46.5 ± 26.2 mm, respectively. The mean distance from hotspot center to sonographic perforator fascia passage was 15.9 ± 9.9 mm with a maximum of 48.4 mm. The positive predictive value of thermographic ALT perforator identification was 93%. CONCLUSION: Thermographic hotspot and perforator location diverge widely in ALT flaps. Dynamic infrared thermography can therefore not be used as standalone technique for preoperative ALT perforator identification. However, the application before color duplex ultrasound examination is a reasonable upgrade and can visualize angiosomes and facilitate the examination.


Assuntos
Retalho Perfurante , Coxa da Perna , Humanos , Coxa da Perna/cirurgia , Termografia/métodos , Extremidade Inferior , Fáscia
4.
J Reconstr Microsurg ; 39(4): 295-300, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-36150693

RESUMO

BACKGROUND: The anterolateral thigh flap is a versatile and dependable perforator flap and is a popular choice in the reconstruction of various body sites. The variable perforator anatomy suggests preoperative perforator imaging to improve safety and speed of dissection. An innovative perforator imaging technique is thermography, which lately gained attention in plastic surgery. METHODS: Thirty-two healthy participants were included in this randomized study. One thigh was examined with dynamic infrared thermography and consecutively with ultrasound, while the contralateral thigh was examined with ultrasound as standalone technology. RESULTS: The application of dynamic infrared thermography prior to ultrasound perforator identification significantly accelerated the ultrasound examination duration by 90 to 130 seconds. The mean duplex ultrasound examination duration correlated positively with the hotspot and perforator quantity per thigh. CONCLUSION: The addition of thermographic perforator mapping can accelerate color duplex ultrasound anterolateral thigh perforator imaging. Furthermore, thermography supplements color duplex ultrasound with crucial information on angiosome location.


Assuntos
Retalho Perfurante , Procedimentos de Cirurgia Plástica , Humanos , Termografia , Ultrassonografia Doppler em Cores/métodos , Ultrassonografia Doppler Dupla , Coxa da Perna/cirurgia , Retalho Perfurante/cirurgia
5.
Microsurgery ; 42(8): 817-823, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36200703

RESUMO

INTRODUCTION: Thorough knowledge of perforator anatomy can facilitate anterolateral thigh (ALT) free flap harvest. The selection of the right or left thigh as donor area may be supported by preoperative perforator imaging and practical considerations. The study aims to determine if the leg dominance should be taken into account, when choosing the donor thigh for ALT free flap harvest, as muscle mass and perfusion might influence perforator quantity. METHODS: ALT perforators were localized by color-coded duplex sonography and dynamic infrared thermography on both thighs within a defined 250 × 80 mm area in 24 subjects. Perforator number and thickness of subcutaneous tissue and muscle layer were compared in dominant and nondominant legs. RESULTS: We found no statistically significant difference comparing sonographically identified ALT perforator numbers and hot spot numbers in dominant and nondominant legs. Yet, we found high interindividual differences. The comparison of subcutaneous tissue and muscle thickness yielded no significant difference. CONCLUSIONS: Our study yielded no evidence for preference of the dominant or nondominant leg in ALT free flap harvesting. As we found high interindividual differences in perforator number, we suggest to rely on preoperative perforator imaging when choosing the ALT free flap donor thigh.


Assuntos
Retalhos de Tecido Biológico , Retalho Perfurante , Procedimentos de Cirurgia Plástica , Humanos , Coxa da Perna/cirurgia , Retalho Perfurante/cirurgia , Perna (Membro)/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Retalhos de Tecido Biológico/cirurgia
6.
J Invest Surg ; 35(9): 1673-1678, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35836365

RESUMO

BACKGROUND: Dermal blood flow is crucial for wound healing and survival of flaps in dermatologic surgery. To improve flap viability in cases of compromised perfusion topical agents can easily be applied. The aim of this placebo-controlled study was to characterize changes of DBF in healthy subjects by quantitatively assessing perfusion dynamics after application of capsaicin to establish a reference for measurements at injured sites. METHODS: In 46 healthy subjects perfusion dynamics after local application with capsaicin and placebo was noninvasively assessed, determining cutaneous oxygen saturation, relative hemoglobin count and blood flow using an Oxygen-to-See device. RESULTS: A significant raise in superficial (162% p = 0.000) and deep (144%, p = 0.000) skin oxygenation after 30 min was provoked. A highly significant raise in measurements of flow and velocity was present in superficial (523%, p = 0.000) and deep (242%, p = 0.000) sites. CONCLUSION: With the introduced model applied to observe changes in parameters of dermal blood flow in healthy subjects the authors can reliably monitor effects of topically administered capsaicin. This baseline can be used as reference for further studies in the settings of endangered flap survival or critically perfused wounds as has been proven in animal studies.


Assuntos
Capsaicina , Pele , Administração Tópica , Capsaicina/farmacologia , Humanos , Fluxometria por Laser-Doppler , Microcirculação
8.
J Reconstr Microsurg ; 38(2): 144-150, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34229351

RESUMO

BACKGROUND: Due to the variable vascular anatomy preoperative perforator mapping facilitates anterolateral thigh (ALT) free flap harvesting. Dynamic infrared perforator imaging can assist preoperative planning by displaying hot spots that represent angiosomes. This study aims to compare previously described precooling methods to develop a standardized simplified protocol for ALT perforator planning. METHODS: Fifty thighs were examined with a FLIR ONE thermal camera. Four different cold challenges, including alcoholic disinfection, wet laparotomy sponge cooling, fan cooling, and cold pack application, were compared. Hot spot locations within a 250 mm × 80 mm area were compared double-blinded to perforator locations determined by Doppler ultrasonography considered as gold standard. RESULTS: The matching rate of thermographic hot spots and sonographically identified perforators was 34.9 ± 22.2%. An increased matching rate of 62.2 ± 42.2% was noted taking only favored perforators (septocutaneous course, diameter >1 mm, distance <3 cm to the center, and visible concomitant veins) into account. Precooling with a fan followed by alcoholic disinfection provided clearest thermograms and fastest results. CONCLUSION: Thermographic imaging is a reliable method for perforator imaging. Its supplemental use to ultrasound may reduce examination time and yield additional information. Precooling by air flow or alcoholic disinfection can be easily implemented and provide the best thermograms. The matching rate of thermographic hot spots and perforators increases when taking only clinically relevant perforators into account. Thermal perforator mapping therefore reduces distraction by negligible perforators.


Assuntos
Retalhos de Tecido Biológico , Retalho Perfurante , Procedimentos de Cirurgia Plástica , Termografia , Coxa da Perna/cirurgia
9.
Handchir Mikrochir Plast Chir ; 53(6): 552-555, 2021 Dec.
Artigo em Alemão | MEDLINE | ID: mdl-34875706

RESUMO

Microsurgical dissection and suturing techniques require persistent practice and perseverance. Rookies in particular often practice on the "dry model" in order to achieve a smooth transition to the application on the patient in the surgical theatre. Whether surgical glove, pig heart, with magnifying glasses, as a virtual reality tool, rat model with or without a training microscope - many different exercise models are described. For a number of years, self-made devices with smartphone cameras as a magnifying aid have also been known and are sometimes used. There is now a new commercial system from the US which allows the trainee to learn basic microsurgical techniques at any time and almost anywhere, or to perfect advanced knotting techniques such as the "through-the-loop" knot relatively easily and inexpensively. For this purpose, a conventional smartphone can be clamped in a 3 D swivel arm and anastomoses can be practiced on various vessel lumens. The smartphone therefor mimics a surgical microscope. There are prefabricated "cards" with built-in small plastic tubes of various diameters (1-3 mm) that can be used for practice.We believe that in the future such training kits can be part of the standard reporting in microsurgical training for interns and students in microsurgical centers.


Assuntos
Microcirurgia , Smartphone , Animais , Competência Clínica , Humanos , Ratos , Estudantes , Técnicas de Sutura , Suínos
10.
J Surg Res ; 262: 190-196, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-33607413

RESUMO

BACKGROUND: The safe execution of local flaps tends to be challenging for surgical residents. Thus, the purpose of the study was to evaluate a training model of local flaps based on fresh human skin excised from body contouring procedures. MATERIALS AND METHODS: A questionnaire and surgical skills evaluation-analyzing the theoretical and procedural knowledge about local flaps-were held both before and after the surgical skills training. All surgical procedures were executed on a simulation model based on fresh human skin. Skills evaluation was done according to a modified version of the Objective Structured Assessment of Technical Skills Score. Results before and after the training were compared using SPSS, version 21. RESULTS: In pretraining evaluation, residents showed great difficulty regarding the accuracy of flap design and sufficiency of wound coverage indicating the need for surgical training outside the operating theater. After training, the procedural skills significantly improved as depicted by the modified Objective Structured Assessment of Technical Skills score with a mean cumulative pretraining score of 26.81 ± 5.41 and posttraining score of 43.59 ± 5.72 (P = 0.008). Also, theoretical knowledge significantly improved in the posttraining evaluation with exception to the indication of a Z-plasty (P = 0.257). The training model itself was generally regarded as highly useful and thus recommendable to others. CONCLUSIONS: Surgical handling and the understanding of tissue rotation clearly improved by the presented model which mimics very realistic conditions. The simulation model based on fresh human skin shows cost-effectiveness and allows a broad range for flap procedures wherefore its use should be further promoted.


Assuntos
Contorno Corporal/métodos , Cirurgia Geral/educação , Internato e Residência , Retalhos Cirúrgicos , Adulto , Competência Clínica , Avaliação Educacional , Feminino , Humanos , Masculino
11.
Handchir Mikrochir Plast Chir ; 53(3): 323-325, 2021 Jun.
Artigo em Alemão | MEDLINE | ID: mdl-33465786

RESUMO

BACKGROUND: The acute calcific periarthritis is caused by hydroxyapatite deposits in the periarticular soft tissue.The symptoms resemble a pyoarthrosis, explaining high rates of misdiagnosis. PATIENTS: Presented are the cases of a 45 and a 46 years old patient, who presented with acute onset of swelling, erythema, functional impairment and pain of the hand. Periarticular calcifications were identified radiologically. RESULTS: The symptoms completely resolved in both patients within few days under conservative treatment. CONCLUSION: The acute calcific periarthritis should be considered as a differential diagnosis of pyoarthrosis in the hand, especially if no suitable trauma preceeded. Usually conservative treatment with immobilization and antiphlogistic drugs rapidly leads to a complete remission.


Assuntos
Calcinose , Periartrite , Calcinose/diagnóstico , Diagnóstico Diferencial , Durapatita , Mãos , Humanos , Pessoa de Meia-Idade , Periartrite/diagnóstico por imagem
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