RESUMEN
STUDY DESIGN: Cadaveric. OBJECTIVE: The aim of this study was to quantify the amplitude and duration of surgeons' muscle exertion from pedicle cannulation to screw placement using both manual and power-assisted tools in a simulated surgical environment using surface electromyography (EMG). SUMMARY OF BACKGROUND DATA: A survey of Scoliosis Research Society members reported rates of neck pain, rotator cuff disease, lateral epicondylitis, and cervical radiculopathy at 3â×, 5â×, 10â×, and 100â× greater than the general population. The use of power-assisted tools in spine surgery to facilitate pedicle cannulation through screw placement during open posterior fixation surgery may reduce torque on the upper limb and risk of overuse injury. METHODS: Pedicle preparation and screw placement was performed from T4-L5 in four cadavers by two board-certified spine surgeons using both manual and power-assisted techniques. EMG recorded muscle activity from the flexor carpi radialis, extensor carpi radialis, biceps, triceps, deltoid, upper trapezius, and neck extensors. Muscle activity was reported as a percentage of the maximum voluntary exertion of each muscle group (%MVE) and muscle exertion was linked to low- (0-20% MVE), moderate- (20%-45% MVE), high- (45%-70% MVE) and highest- (70%-100% MVE) risk of overuse injury based on literature. RESULTS: Use of power-assisted tools for pedicle cannulation through screw placement maintains average muscle exertion at low risk for overuse injury for every muscle group. Conversely with manual technique, the extensor carpi radialis, biceps, upper trapezius and neck extensors operate at levels of exertion that risk overuse injury for 50% to 92% of procedure time. Powerassisted tools reduce average muscle exertion of the biceps, triceps, and deltoid by upwards of 80%. CONCLUSION: Power-assisted technique protects against risk of overuse injury. Elevated muscle exertion of the extensor carpi radialis, biceps, upper trapezius, and neck extensors during manual technique directly correlate with surgeons' self-reported diagnoses of lateral epicondylitis, rotator cuff disease, and cervical myelopathy.Level of Evidence: N/A.
Asunto(s)
Trastornos de Traumas Acumulados , Tornillos Pediculares , Cirujanos , Trastornos de Traumas Acumulados/prevención & control , Electromiografía , Humanos , Músculo Esquelético , Extremidad Superior/cirugíaRESUMEN
OBJECTIVE: To evaluate whether the time from symptom onset to diagnosis of slipped capital femoral epiphysis (SCFE) has improved over a recent decade compared with reports of previous decades. STUDY DESIGN: Retrospective review of 481 patients admitted with a diagnosis of SCFE at three large pediatric hospitals between January 2003 and December 2012. RESULTS: The average time from symptom onset to diagnosis of SCFE was 17 weeks (range, 0-to 169). There were no significant differences in time from symptom onset to diagnosis across 2-year intervals of the 10-year study period (P = .94). The time from evaluation by first provider to diagnosis was significantly shorter for patients evaluated at an orthopedic clinic (mean, 0 weeks; range, 0-0 weeks) compared with patients evaluated by a primary care provider (mean, 4 weeks; range, 0-52 weeks; r = 0.24; P = .003) or at an emergency department (mean, 6 weeks, range, 0-104 weeks; r = 0.36; P = .008). Fifty-two patients (10.8%) developed a second SCFE after treatment of the first affected side. The time from the onset of symptoms to diagnosis for the second episode of SCFE was significantly shorter (r = 0.19; P < .001), with mean interval of 11 weeks (range, 0-104 weeks) from symptom onset to diagnosis. There were significantly more cases of mildly severe SCFE, as defined by the Wilson classification scheme, in second episodes of SCFE compared with first episodes of SCFE (OR, 4.44; P = .001). CONCLUSION: Despite reports documenting a lag in time to the diagnosis of SCFE more than a decade ago, there has been no improvement in the speed of diagnosis. Decreases in both the time to diagnosis and the severity of findings for the second episode of SCFE suggest that the education of at-risk children and their families (or providers) may be of benefit in decreasing this delay.
Asunto(s)
Diagnóstico Tardío/tendencias , Epífisis Desprendida de Cabeza Femoral/diagnóstico , Adolescente , Niño , Preescolar , Femenino , Humanos , Masculino , Estudios Retrospectivos , Factores de Tiempo , Estados UnidosRESUMEN
OBJECTIVE: To determine the frequency and clinical significance of postoperative fever in pediatric patients undergoing posterior spinal fusion (PSF). STUDY DESIGN: A retrospective chart review was performed for consecutive patients undergoing PSF at a single institution between June 2005 and April 2011, with a minimum of 2-year follow up. Exclusion criteria were previous spine surgery, a combined anterior-posterior approach, and delayed wound closure at the time of surgery. RESULTS: Two hundred and seventy-eight patients with an average age of 13 years (1-22 years) met inclusion criteria, with the following diagnoses: adolescent idiopathic scoliosis 43%, neuromuscular/syndromic scoliosis 39%, congenital scoliosis 11%, spondylolisthesis 4%, and Scheuermann kyphosis 3%. Seventy-two percent (201/278) of patients had a maximum temperature (Tmax) >38(°) postoperatively, and 9% (27/278) Tmax >39(°). The percentage of febrile patients trended down following the first postoperative day. Infection rate was 4% (12/278). There was no correlation between Tmax >38(°) or Tmax >39(°), and timing of fever, positive blood or urine cultures, pneumonia, or surgical site infection. CONCLUSION: Seventy-two percent of pediatric patients undergoing PSF experienced postoperative fever, and 9% of patients had Tmax>39(°). There was no significant correlation between fever and positive blood culture, urine culture, pneumonia, or surgical site infection. This information may help relieve stress for families and healthcare providers, and obviate routine laboratory evaluation for fever alone.
Asunto(s)
Fiebre/etiología , Escoliosis/cirugía , Fusión Vertebral/efectos adversos , Infección de la Herida Quirúrgica/epidemiología , Adolescente , California/epidemiología , Niño , Preescolar , Femenino , Fiebre/epidemiología , Estudios de Seguimiento , Humanos , Incidencia , Lactante , Masculino , Complicaciones Posoperatorias , Pronóstico , Estudios Retrospectivos , Infección de la Herida Quirúrgica/complicaciones , Vértebras Torácicas , Factores de Tiempo , Adulto JovenRESUMEN
OBJECTIVE: To assess availability of timely orthopedic fracture care to children. STUDY DESIGN: Fifty randomly selected orthopedic practices were contacted twice with an identical scenario to request an appointment for a fictitious child with an arm fracture, once with the staff told that the child had private insurance and once with Medicaid. Access to appointments on the basis of insurance was compared with rates 10 years earlier.(1) RESULTS: Forty-five practices were contacted successfully. An appointment was offered within 7 days to a child with private insurance by 42% of the practices (19/45) and to a child with Medicaid by 2% of the practices (1/45; P < .0001). There was no difference in timely access (appointment within 7 days) for children with Medicaid in this study (2%) compared with 10 years ago (1%; P = 1.0). There was a significant decrease in timely access for children with private insurance in the past decade, with a rate of 42% (19/45) in this study, compared with 100% (50/50) 10 years ago (P < .0001). CONCLUSION: There has been a substantial decrease in the last decade in the willingness, availability, or both of orthopedic surgeons in Los Angeles to care for children with fractures whose families have private insurance. Children with Medicaid continue to have limited access.