RESUMO
BACKGROUND: In distal upper extremity surgeries, there can be a choice to use an upper arm or forearm tourniquet. This study examines discomfort and tolerance in healthy volunteers to determine whether one is more comfortable. METHODS: Forty healthy, study participants were randomized to an upper extremity laterality and site. Tourniquets were inflated to 100 mm Hg over systolic blood pressure. Participants experienced an upper arm and a forearm tourniquet sequentially. Visual analog scores (VAS) were recorded at 2-minute intervals. Time until request and VAS at tourniquet deflation were recorded. Time until the complete resolution of paresthesias was also recorded. Participants subjectively stated which tourniquet felt more comfortable. RESULTS: Tourniquets were inflated longer on the forearm than the upper arm (mean 16.1 minutes versus 12.2 minutes; P < 0.0001). VAS at tourniquet removal was not different between the sites (means 7.3 and 7.3) (P = 0.839). Time until paresthesia resolution after the tourniquet was deflated was not different (means 8.1 and 7.7 minutes) (P = 0.675). Time until paresthesia resolution was proportional to tourniquet inflation time for both sites (regression coefficient 0.41; P < 0.00001). Participants found the forearm more comfortable (95% confidence interval, 0.63 to 0.92). CONCLUSION: Forearm placement allows the tourniquet to be inflated for an average of 4 minutes longer. Forearm tourniquet is subjectively more comfortable.
Assuntos
Braço , Torniquetes , Antebraço/cirurgia , Humanos , Parestesia , Extremidade SuperiorRESUMO
Background: Given the importance of the neurovascular structures in the volar forearm, accurate diagnosis of zone 5 flexor injuries is critical. Purpose: We sought to test the hypothesis that tendinous injury would be more likely in the distal 50% of the forearm and muscle belly injury would be more likely in the proximal 50% of the forearm. Methods: From December 2015 to December 2016, we conducted a prospective clinical study of patients 18 years and older with zone 5 flexor lacerations. We excluded those with concomitant ipsilateral injuries in flexor zones 1 to 4, multiple lacerations in flexor zone 5, prior neurovascular injuries, crush injuries, patients who underwent operative exploration prior to transfer to our facility, and patients who were unable or unwilling to provide consent. Neurovascular and musculotendinous injuries on physical examination were recorded. All patients underwent operative exploration. Physical examination accuracy and the incidence of musculotendinous and neurovascular injury in the distal 50% of the forearm were compared with the proximal 50% of the forearm. Results: The distal 50% of the forearm (group 1, n = 14) had higher probability of tendon injury (64%), whereas lacerations of the proximal 50% of the forearm (group 2, n = 5) did not result in any tendinous injuries. Rather, all patients in group 2 had muscle belly injuries. There was no difference in the rate of neurovascular injury between groups. Physical examination alone was highly accurate in diagnosing nerve injuries (93%-100%) but less accurate in diagnosing arterial injuries (79%-80%) regardless of the location of injury. Conclusions: Due to the lack of tendinous injuries in proximal zone 5 lacerations, along with the accuracy of physical examination in determining the presence of neurovascular injuries, patients with lacerations in the proximal half of the forearm, without evidence of nerve or arterial injury, can likely be observed in lieu of immediate operative exploration.
RESUMO
BACKGROUND: Management of scaphoid nonunions with bone loss varies substantially. Commonly, internal fixation consists of a single headless compression screw. Recently, some authors have reported on the theoretical benefits of dual-screw fixation. We hypothesized that using 2 headless compression screws would impart improved stiffness over a single-screw construct. METHODS: Using a cadaveric model, we compared biomechanical characteristics of a single tapered 3.5- to 3.6-mm headless compression screw with 2 tapered 2.5- to 2.8-mm headless compression screws in a scaphoid waist nonunion model. The primary outcome measurement was construct stiffness. Secondary outcome measurements included load at 1 and 2 mm of displacement, load to failure for each specimen, and qualitative assessment of mode of failure. RESULTS: Stiffness during load to failure was not significantly different between single- and double-screw configurations (P = .8). Load to failure demonstrated no statistically significant difference between single- and double-screw configurations. Using a qualitative assessment, the double-screw construct maintained rotational stability more than the single-screw construct (P = .029). CONCLUSIONS: Single- and double-screw fixation constructs in a cadaveric scaphoid nonunion model demonstrate similar construct stiffness, load to failure, and load to 1- and 2-mm displacement. Modes of failure may differ between constructs and represent an area for further study. The theoretical benefit of dual-screw fixation should be weighed against the morphologic limitations to placing 2 screws in a scaphoid nonunion.
Assuntos
Parafusos Ósseos , Osso Escafoide , Humanos , Cadáver , Osso Escafoide/cirurgia , Fixação Interna de Fraturas , Extremidade SuperiorRESUMO
Introduction Necrotizing soft tissue infection (NSTI) of the upper extremity (UE) is a rapidly progressing infection that requires early diagnosis and emergent treatment to decrease risks of loss of limb or life. Clinical presentation, particularly of early NSTI, can appear similar to serious cellulitis or abscess. The purpose of this study was to identify factors that are associated with NSTI rather than serious cellulitis and abscess to differentiate patients with similar clinical presentations. Methods This study uses a retrospective cohort design that compares patients ultimately diagnosed with UE NSTI versus those diagnosed with UE serious cellulitis or abscess. Cohorts were matched using the Laboratory Risk Indicators for Necrotizing Fasciitis (LRINEC) score in the setting of UE soft tissue infection. Laboratory values, vital signs, subjective symptoms, and social factors including substance abuse and domiciled status were recorded. Continuous variables were compared using the Mann-Whitney U test, whereas categorical variables were compared using the chi-squared test or the Fisher exact test (for expected values less than 5). A binary logistic regression for continuous and categorical variables was also performed. Significance was set at p<0.05. Univariate and multivariate analyses were performed. Results Multivariate statistical analysis and clinical interpretation of data identified four factors more associated with a diagnosis of NSTI than serious cellulitis or abscess: elevated lactate on hospital presentation, a patient-reported history of fever, male gender, and homelessness. Conclusions In patients with upper extremity infections, the clinical presentation of NSTI and serious cellulitis or abscess may appear similar. In this retrospective cohort of patients matched with LRINEC scores, elevated lactate, subjective fever, male gender, and homelessness were significantly associated with NSTI rather than serious cellulitis or abscess.
RESUMO
Background: Radiocarpal dislocations represent a high-energy wrist injury that can occur with or without concomitant fractures about the wrist. Poor outcomes are often due to radiocarpal instability and secondary ulnar translation. The purpose of this cadaveric study is to determine if there is any difference in the radiographic parameters in a wrist dislocation model given the different location of distal fixation. Methods: Ten paired fresh cadaver upper extremities were fluoroscopically evaluated with posterior-anterior (PA) and lateral views. We created a radiocarpal dislocation model and applied a dorsal bridge plate to either the second or third metacarpal. Repeat PA and lateral fluoroscopic views were obtained for evaluation of radial inclination, radial height, volar tilt, ulnar variance, radiolunate angle, radioscaphoid angle, scapholunate angle, radial rotation index, and four indices for ulnar translation (Taleisnik, Gilula, McMurtry, and Chamay). Results: Bridge plate application to the second metacarpal resulted in a significantly greater incidence of ulnar translation compared to the third metacarpal. Application to either metacarpal resulted in extension of the carpus relative to the radius. Conclusions: A more anatomic radiocarpal relationship was restored more often when distal fixation of the dorsal wrist-spanning bridge plate was applied to the third metacarpal. Further investigation is warranted to determine clinical relevance of these findings in conjunction with clinical and radiographic outcomes.
Assuntos
Traumatismos do Punho , Punho , Cadáver , Humanos , Ulna/diagnóstico por imagem , Ulna/cirurgia , Traumatismos do Punho/diagnóstico por imagem , Traumatismos do Punho/cirurgia , Articulação do Punho/diagnóstico por imagem , Articulação do Punho/cirurgiaRESUMO
Clenched fist injury is associated with a high risk of infectious complications and is commonly managed with formal irrigation and debridement in the operating theatre. The purpose of this study was to determine outcomes associated with irrigation and debridement of clenched fist injuries under local anaesthesia using field sterility outside the operative theatre. In this single centre study, 232 patients were identified with clenched fist injury and 210 were treated with a standard protocol beginning with administration of intravenous antibiotics and then irrigation and debridement at the bedside. Primary outcome measures were the need for repeat debridement and complications. Secondary outcome measures included factors associated with the need for repeat debridement. Fifteen of the 210 patients (7%) required repeat debridement. Patients with cultures positive for gram-negative organisms had a significantly increased risk of repeat debridement. Irrigation and debridement under local anaesthesia using field sterility results in an acceptably low risk of complications or need for repeat debridement.Level of evidence: IV.
Assuntos
Traumatismos da Mão , Infertilidade , Anestesia Local , Desbridamento , HumanosRESUMO
CASE: The patient was a 60-year-old woman with a comminuted, open distal radius and distal ulna metadiaphyseal fracture. After fixation of the distal radius, the distal ulna was unstable and crepitant with rotation and anteroposterior translation. Because of limited bone stock and poor soft tissue, we spanned the distal ulna using a wrist spanning plate. This was removed at 6 weeks postoperatively. She healed and was satisfied with her outcomes. CONCLUSION: This case describes the original use of a wrist spanning plate for a complex distal ulna fracture. Ulnocarpal-spanning plate fixation provides an alternative to traditional methods of fixation.
Assuntos
Fixação Interna de Fraturas/instrumentação , Fraturas Cominutivas/cirurgia , Fraturas da Ulna/cirurgia , Traumatismos do Punho/cirurgia , Placas Ósseas , Feminino , Humanos , Pessoa de Meia-IdadeRESUMO
Background Treatment of scaphoid proximal pole (SPP) nonunion with a vascularized osteochondral graft from the medial femoral trochlea (MFT) has been described, with positive outcomes thus far. However, our understanding of the congruency between the articular surfaces of these structures is incomplete. Objective Our purpose was to evaluate the congruency of the MFT and SPP using a quantitative anatomical approach. Methods The distal femur and ipsilateral scaphoid were dissected from 12 cadavers and scanned with computerized tomography. Three-dimensional models were created and articular surfaces were digitally "dissected." The radius of curvature (RoC) of the radioulnar (RU) and proximodistal (PD) axes of the SPP and MFT, respectively, as well as the orthogonal axes (SPP, anteroposterior [AP]; MFT, mediolateral [ML]) were calculated. The RoC values were compared using the Wilcoxon signed-rank test. Results The RoC values for the SPP and MFT were not significantly different in the RU-PD plane ( p = 0.064). However, RoC values for the SPP and MFT were significantly different in the AP-ML plane ( p = 0.001). Conclusions For most individuals, the RU curvature of the SPP was similar to the PD curvature of the MFT. For nearly all individuals, the AP curvature of the SPP and the ML curvature of the MFT shared less congruence. Clinical Relevance Articular surface congruity may not be a critical factor associated with improvements in wrist function following this procedure.
RESUMO
PURPOSE: The primary objective of this study was to compare incidence, demographic trends, and rates of subsequent fusion between proximal row carpectomy (PRC) and 4-corner fusion (4CF) among patients in the United States. METHODS: A total of 3,636 patients who underwent PRC and 5,047 who underwent 4CF were identified from the years 2005 through 2014 among enrollees in the PearlDiver database. Regional distribution, demographic characteristics, annual incidence, comorbidities, and subsequent wrist fusion were compared between the 2 groups. Of the patients identified, 3,512 from each group were age- and sex-matched and subsequently compared for rates of converted fusion, 30- and 90-day readmission rates, and average direct cost. RESULTS: Patients undergoing 4CF and PRC did not have statistically significant differences in comorbidities. The incidence of the procedures among all subscribers increased for both PRC (1.8 per 10,000 to 2.6 per 10,000) and 4CF (1.2 per 10,000 to 2.0 per 10,000) from 2005 to 2014. Comparing the matched cohorts, patients who underwent 4CF had a higher rate of subsequent fusion than those who underwent PRC (2.67% vs 1.79%). Readmission rates were not significantly different at 30 or 90 days. Average direct cost was significantly greater for 4CF than for PRC. CONCLUSIONS: Both PRC and 4CF have been utilized at increasing rates in the past decade. Wrist fusion rates and average costs are higher in the 4CF group without a significant difference in readmission rates. TYPE OF STUDY/LEVEL OF EVIDENCE: Therapeutic III.
Assuntos
Ossos do Carpo , Artrodese , Humanos , Incidência , Amplitude de Movimento Articular , Resultado do Tratamento , Articulação do PunhoRESUMO
Internal radiocarpal distraction plating is a versatile tool in the treatment of distal radius fractures that are not amenable to nonoperative treatment or operative fixation with standard volar or dorsal implants. Internal distraction plates may also be indicated in the setting of polytrauma or osteopenic bone. The plate functions as an internal fixator, using ligamentotaxis to restore length and alignment while providing relative stability for bony healing. The plate can be fixed to either the second or the third metacarpal, and anatomic and biomechanical studies have assessed the strengths and weaknesses of each strategy. This operative fixation technique leads to acceptable radiographic results and functional outcomes. Following fracture union, the plate is removed, and wrist range of motion is resumed.
Assuntos
Placas Ósseas , Fixação Interna de Fraturas/métodos , Ossos Metacarpais/cirurgia , Osteogênese por Distração/instrumentação , Fraturas do Rádio/cirurgia , Fenômenos Biomecânicos , Fixação Interna de Fraturas/instrumentação , Humanos , Osteogênese por Distração/métodos , Fraturas do Rádio/fisiopatologia , Amplitude de Movimento Articular , Resultado do Tratamento , Punho/fisiopatologiaRESUMO
Background: External fixation has been traditionally used to treat comminuted or open distal radius fractures that are not amenable to open reduction internal fixation. This procedure is associated with a relatively high complication rate and has been used with decreasing frequency in recent years. However, trends in external fixation utilization for the treatment of distal radius fractures have not been described. Methods: Using the Nationwide Inpatient Sample, patients with a distal radius fracture treated with external fixation from 2003 to 2014 were identified. The annual incidence was reported, and hospital and demographic variables associated with external fixation use were determined. Results: During the study period, 593 929 patients with a distal radius fracture were identified, of which 51 766 (8.7%) were treated with a wrist-spanning external fixator. Wrist external fixation for the treatment of distal radius fractures declined steadily from 2003 to 2014. In 2003, external fixation use was highest, accounting for 17.4% of distal radius fractures. By 2014, only 4.9% of distal radius fracture were treated with external fixation. During this period, the incidence of distal radius fractures declined by 6.9% while external fixator utilization decreased by 73.7%. Patients receiving an external fixator were more likely to be male, low-income, and treated in a rural, nonteaching, privately owned hospital. Conclusions: External fixator use for the treatment of distal radius fractures steadily declined during the study period. Males and those with lower incomes treated in rural, nonteaching, and privately owned hospitals are more likely to receive external fixation.
Assuntos
Fixadores Externos , Fraturas do Rádio , Punho , Idoso , Feminino , Humanos , Masculino , Medicare , Fraturas do Rádio/cirurgia , Estados Unidos/epidemiologia , Articulação do PunhoRESUMO
Background: Soft tissue defects about the elbow with concurrent ligamentous instability can be challenging to treat. Methods: We present a case report of a lateral elbow wound that resulted in lateral ulnar collateral ligament deficiency and posterolateral elbow instability. Results: We describe our technique of a modified brachioradialis rotational flap, in which the muscle is rotated to cover the soft tissue defect, while the vascularized brachioradialis tendon is used to simultaneously reconstruct the lateral ulnar collateral ligament. This procedure successfully restored posterolateral elbow stability at the time of wound coverage. Conclusion: Elbow soft tissue defects with associated ligamentous injuries can be treated using a modification of the brachioradialis rotational flap.
Assuntos
Ligamentos Colaterais , Reconstrução do Ligamento Colateral Ulnar , Idoso de 80 Anos ou mais , Ligamentos Colaterais/cirurgia , Articulação do Cotovelo/diagnóstico por imagem , Articulação do Cotovelo/cirurgia , Humanos , Instabilidade Articular/cirurgia , Masculino , Staphylococcus aureus Resistente à MeticilinaRESUMO
Neonatal brachial plexus palsy (NBPP) is a birth injury that can cause severe functional loss in the affected limb. The purpose of this study was to determine the temporal changes in the national incidence of this condition and whether associated risk factors have changed over time. Children born via vaginal delivery were identified in the Kids' Inpatient Database (KID) from 1997 to 2012, and those with NBPP were identified. The trend in incidence and risk factors were assessed through the study period. The nationwide incidence of NBPP decreased during the study period. Infants with shoulder dystocia, fetal macrosomia, and gestational diabetes had the highest risk of developing NBPP, while multiple birth mates during delivery had a protective effect. Multiple risk factors, including shoulder dystocia, macrosomia, and heavy for dates became less predictive of the development of NBPP over time. Several risk factors predispose children to the development of NBPP, and the effect of these risk factors has been changing. This information can guide obstetric treatment to help prevent NBPP. Level of evidence is diagnostic, level 3.
Assuntos
Paralisia do Plexo Braquial Neonatal , Causalidade , Parto Obstétrico/efeitos adversos , Parto Obstétrico/estatística & dados numéricos , Diabetes Gestacional/diagnóstico , Diabetes Gestacional/epidemiologia , Feminino , Macrossomia Fetal/diagnóstico , Macrossomia Fetal/epidemiologia , Humanos , Incidência , Recém-Nascido , Masculino , Paralisia do Plexo Braquial Neonatal/diagnóstico , Paralisia do Plexo Braquial Neonatal/epidemiologia , Obstetrícia/tendências , Gravidez , Fatores de Risco , Distocia do Ombro/diagnóstico , Distocia do Ombro/epidemiologia , Estados Unidos/epidemiologiaRESUMO
Background The purpose of this study is to assess the epidemiology, population-specific treatment trends, and complications of distal radius fractures in the United States. Methods The PearlDiver database (Humana [2007-2014], Medicare [2005-2014]) was used to access US inpatient and outpatient data for all patients who had undergone operative and nonoperative treatment for a distal radius fracture in the United States. Epidemiologic analysis was performed followed by age-based stratification, to assess prevalence, treatment trends, and rates of complications. Results A total of 1,124,060 distal radius treatment claims were captured. The incidence of distal radius fractures follows a bimodal distribution with distinct peaks in the pediatric and elderly population. Fractures in the pediatric population occurred predominately in males, whereas fractures in the elderly population occurred more frequently in females. The most commonly used modality of treatment was nonoperative; however, the use of internal fixation increased significantly during the study period, from 8.75 to 20.02%, with a corresponding decrease in percutaneous fixation. The overall complication rate was 8.3%, with mechanical symptoms most frequently reported. Conclusions The last decade has seen a significant increase in the use of internal fixation as treatment modality for distal radius fractures. The impetus for this change is likely multifactorial and partly related to recent innovations including volar locking plates and an increasingly active elderly population. The implicated financial cost must be weighed against the productivity cost of maintaining independent living to determine the true burden to the healthcare system.
RESUMO
Background Dorsal bridge plate fixation is an effective technique for stabilization of highly comminuted, complex distal radius fractures. However, it is unknown whether fixation to the second or third metacarpal is optimal. Given dorsal bridge plating spans the radiocarpal joint, it is unclear if the dorsal spanning plate affects carpal position. This study investigates differences in carpal translocation resulting from bridge plate distal fixation to either the second or third metacarpal. Methods Ten paired cadaveric upper extremities without evidence of gross deformity or prior surgery distal to the elbow were evaluated with three-view wrist fluoroscopic images for baseline radiographic measurements. An unstable distal radius fracture model was created via a volar approach using a 1-cm osteotomy. Following fracture creation, a dorsal bridge plate was applied with random to the second metacarpal on one limb, and the third metacarpal on the contralateral limb. Laterality for distal fixation was chosen randomly. Fluoroscopic images were repeated and radial inclination, radial height, radiocarpal angle, volar tilt, ulnar variance, radiolunate angle, radioscaphoid angle, radial rotation index, and carpal translocation were measured. Results Radial inclination, radial height, radiocarpal angle, volar tilt, ulnar variance, radiolunate angle, and radioscaphoid angle were not statistically different before and after fixation, or when comparing the second or third metacarpal fixation. Additionally, there was no difference in Taleisnik's ulnar translocation index, Chamay's ulnar translation index, or McMurtry's carpal translation index based on which metacarpal was used for distal fixation. Conclusions Dorsal bridge plate fixation of distal radius fractures restores preoperative physiologic measures of the radius, ulna, and carpus. Carpal translocation was similar when comparing distal fixation to the second or third metacarpal in distal radius fractures stabilized with a bridge plate. Level of Evidence This is a Level V, therapeutic study.
RESUMO
BACKGROUND: Flexor zone II is defined as the region spanning the proximal aspect of the A1 pulley to the insertion of the flexor digitorum superficialis (FDS) tendon. Descriptions of the FDS insertion are inconsistent in the literature, but zones of injury are frequently determined with reference to superficial landmarks. The purpose of this study was to describe the footprint of the FDS insertion and define its relationship to the proximal interphalangeal (PIP) skin crease. METHODS: The FDS insertion on the index, middle, ring, and small fingers was dissected in 6 matched pairs of fresh-frozen cadaveric hands. A Kirschner wire was used to mark the level of the PIP skin crease on bone before measurements of the FDS footprint and its position relative to the PIP skin crease were made using digital calipers. RESULTS: The radial and ulnar FDS slips inserted a mean distance of 3.22 mm from the distal aspect of the PIP skin crease and varied by digit. The mean distal extent of the FDS insertion was 8.29 mm. The mean length of the insertion of each FDS slip was 5.15 mm and the mean width was 1.9 mm. CONCLUSIONS: The radial and ulnar FDS slips insert on average 3.22 mm distal to the PIP skin crease and vary by digit. Knowledge of the FDS insertion is clinically relevant when differentiating between flexor zone I and zone II injuries, planning surgical approaches to the finger, and in guiding patient expectations for surgery given the variability in outcome based on zone of injury.
Assuntos
Articulações dos Dedos/anatomia & histologia , Dedos/anatomia & histologia , Músculo Esquelético/anatomia & histologia , Traumatismos dos Tendões/cirurgia , Tendões/anatomia & histologia , Pontos de Referência Anatômicos/anatomia & histologia , Pontos de Referência Anatômicos/cirurgia , Fios Ortopédicos , Cadáver , Articulações dos Dedos/cirurgia , Dedos/cirurgia , Antebraço/anatomia & histologia , Antebraço/cirurgia , HumanosRESUMO
Background: Traumatic upper extremity amputation in a child can be a life-altering injury, yet little is known about the epidemiology or health care costs of these injuries. In this study, using the Healthcare Cost and Utilization Project (HCUP) Kids' Inpatient Database (KID), we assess these trends to learn about the risk factors and health care costs of these injuries. Methods: Using the HCUP KID from 1997 to 2012, patients aged 20 years old or younger with upper extremity traumatic amputations were identified. National estimates of incidence, demographics, costs, hospital factors, patient factors, and mechanisms of injury were assessed. Results: Between 1997 and 2012, 6130 cases of traumatic upper extremity amputation occurred in children. This resulted in a $166 million cost to the health care system. Males are 3.4 times more likely to be affected by amputation than females. The most common age group to suffer amputation is in older children, aged 15 to 19 years old. The frequency of amputation has declined 41% from 1997 to 2012. The overwhelming majority of amputations (92.54%) involved digits. Conclusions: Pediatric traumatic amputations of the upper extremity are a significant contribution to health care spending. Interventions and educational campaigns can be targeted based on national trends to prevent these costly injuries.
Assuntos
Amputação Traumática/epidemiologia , Traumatismos do Braço/epidemiologia , Traumatismos dos Dedos/epidemiologia , Custos de Cuidados de Saúde/tendências , Extremidade Superior/lesões , Adolescente , Amputação Traumática/economia , Traumatismos do Braço/economia , Criança , Pré-Escolar , Bases de Dados Factuais , Feminino , Traumatismos dos Dedos/economia , Humanos , Incidência , Lactente , Pacientes Internados/estatística & dados numéricos , Masculino , Fatores de Risco , Estados Unidos/epidemiologia , Adulto JovemRESUMO
PURPOSE: Hemi-hamate arthroplasty has been described as a viable treatment option for unstable proximal interphalangeal joint fracture-dislocations. The procedure uses a dorsal distal hamate osteochondral graft to recreate the injured volar middle phalanx (MP) proximal base. The purpose of this study was to evaluate the similarity in shape of these articular surfaces using quantitative 3-dimensional methods. METHODS: Three-dimensional virtual renderings were created from laser scans of the articular surfaces of the dorsal distal hamate and the volar MP bases of the index, middle, ring, and little fingers from cadaveric hands of 25 individuals. Three-dimensional landmarks were obtained from the articular surfaces of each bone and subjected to established geometric morphometric analytical approaches to quantify shape. For each individual, bone shapes were evaluated for covariation using 2-block partial least-squares and principal component analyses. RESULTS: No statistically significant covariation was found between the dorsal distal hamate and volar MP bases of the middle, ring, or little digits. Whereas the volar MP bases demonstrated relative morphologic uniformity among the 4 digits both within and between individuals, the dorsal distal hamates exhibited notable variation in articular surface morphology. CONCLUSIONS: Despite the early to midterm clinical success of hemi-hamate arthroplasty, there is no statistically significant, uniform similarity in shape between the articular surfaces of the dorsal distal hamate and the volar MP base. In addition, there is wide variation in the articular morphology of the hamate among individuals. CLINICAL RELEVANCE: The lack of uniform similarity in shape between the dorsal distal hamate and the volar MP base may result in unpredictable outcomes in HHA. It is recommended that the variation in hamate morphology be considered while reconstructing the injured volar MP base in the procedure.
Assuntos
Falanges dos Dedos da Mão/anatomia & histologia , Falanges dos Dedos da Mão/diagnóstico por imagem , Hamato/anatomia & histologia , Hamato/diagnóstico por imagem , Imageamento Tridimensional , Pontos de Referência Anatômicos , Cadáver , Feminino , Humanos , Lasers , Análise dos Mínimos Quadrados , Masculino , Análise de Componente PrincipalRESUMO
BACKGROUND: Dorsal spanning plate fixation is an increasingly popular method of fixation for certain distal radius fractures. Published outcomes are encouraging, but complications are still reported. METHODS: We present a case report of a 26-year-old woman with spanning plate breakage and extensor pollicis longus (EPL) metallosis, fraying, and near-complete rupture. The patient's unsuccessful follow-up led to this complication. Metallosis and damage to the extensor indices (EI) and distal extensor carpi radialis longus (ECRL) were intraoperative obstacles for tendon transfer to restore EPL function. RESULTS: Tendon transfer in the setting of bridge plate failure has not yet been described in the literature. There are reports of spanning plate failure indicating that breakage often happens through the plate's holes and after fracture healing. CONCLUSIONS: The compounded complication of plate failure with extensor tendon injury emphasizes the important relationship between the local anatomy, barriers to patient care, and potential problems after spanning plate fixation.
RESUMO
Background No consensus exists regarding postoperative splinting position following volar plate fixation of distal radius fractures. Purpose The purpose of this study was to determine whether immobilization in supination would result in superior outcomes compared with no restriction of forearm range of motion. Patients and Methods All patients >18 years of age with distal radius fractures indicated for volar plate fixation were eligible. Exclusion criteria were open fracture and concomitant injury to, or functional deficit of, either upper extremity. Patients were randomized to immobilization in (1) maximal supination with a sugar-tong splint or (2) no restriction of supination with a volar splint. Patient-Rated Wrist Evaluation (PRWE), Disabilities of the Arm, Shoulder, and Hand (DASH) score, and visual analog scale (VAS) score; wrist range of motion; and grip strength were recorded at 2 and 6 weeks postoperatively. A Student's t -test was used to compare mean values of all outcome measures at each time point. Results A total of 46 patients enrolled in the study; 28 were immobilized with a volar splint and 18 were immobilized with a sugar-tong splint. Six-week follow-up data were obtained for 32 patients. There was no significant difference in PRWE, DASH, and VAS scores; or range of motion; or grip strength between the two groups postoperatively. Conclusion Range of motion, grip strength, and patient-rated outcome measures were similar regardless of postoperative immobilization technique in patients with a distal radius fractures stabilized with a volar plate. Surgeons can elect to use the standard-of-care postoperative immobilization modality of their preference following volar plate fixation without compromising short-term return to function. Level of Evidence This is a Level II, therapeutic study.