Hemiepiphysiodesis Implants for Late-onset Tibia Vara: A Comparison of Cost, Surgical Success, and Implant Failure.

BACKGROUND: The purpose of this study was to compare hemiepiphysiodesis implants for late-onset tibia vara and to evaluate patient characteristics that may predict surgical failure. METHODS: This is a retrospective review of late-onset tibia vara patients treated with temporary hemiepiphysiodesis from 1998 to 2012. Mechanical axis deviation (MAD), mechanical axis angle, mechanical lateral distal femoral angle, and medial proximal tibial angle were measured on standing bone length radiographs. Surgical failure was defined as residual deformity requiring osteotomy, revision surgery, or MAD exceeding 40 mm at the time of final follow-up. Implant failure was recorded. Costs included implants and disposables required for construct placement. Staple constructs included 2 or 3 staples. Plate constructs included the plate, screws, guide wires, and drill bits. RESULTS: A total of 25 patients with 38 temporary lateral proximal tibia hemiepiphysiodeses met the inclusion criteria. The average body mass index (BMI) was 39.1 kg/m with an average follow-up of 3.0 years (minimum 1 y). Surgical failure occurred in 57.9% of patients. Greater BMI (P=0.05) and more severe deformity (MAD, mechanical axis angle, and medial proximal tibial angle; P<0.01) predicted higher rates of surgical failure. Younger age predicted higher rates of implant failure (P<0.01). There were no differences in surgical or implant failure between staple and plate systems. Hospital costs of plate constructs ($781 to $1244) were 1.5 to 3.5 times greater than the staple constructs ($332 to $498). CONCLUSIONS: Greater BMI, more severe deformity, and younger age were predictive of surgical or implant failure. There was no difference in success between implant types, whereas the cost of plate constructs was 1.5 to 3.5 times greater than staples. The rate of surgical failure was high (58%) and consideration should be given to reserving hemiepiphysiodesis for patients with lower BMI and less severe deformity. In our population, if hemiepiphysiodesis was not offered to patients with BMI>35 or MAD>80 mm varus, the surgical failure rate would diminish to 28%. The failure rate outside these parameters would be 88%. LEVEL OF EVIDENCE: Level II­Prognostic.

Outcomes and costs associated with hospitalist comanagement of medically complex children undergoing spinal fusion surgery.

OBJECTIVE: The goal of this study was to assess outcomes and costs associated with hospitalist comanagement of medically complex children undergoing spinal fusion surgery for neuromuscular scoliosis. METHODS: A hospitalist comanagement program was implemented at a children's hospital. We conducted a retrospective case series study of patients during 2003-2008 to compare clinical and cost outcomes for 87 preimplementation patients, 40 patients during a partially implemented program, and 80 patients during a fully implemented program. RESULTS: When compared with preimplementation patients, full implementation program patients did not demonstrate a statistically significant difference in median length of stay on the medical/surgical unit after transfer from the PICU (median: 6 vs 8 days; P = .07). Patients in the full implementation group received fewer days of parenteral nutrition (median: 0 vs 6 days; P = .0006) and had fewer planned and unplanned laboratory studies on the inpatient unit. There was no statistically significant change in returns to the operating room (P = .08 between preimplementation and full implementation), other complications, or 30-day readmissions. Median hospital costs increased from preimplementation ($59372) to partial implementation ($89302) and remained elevated during full implementation ($81 651) compared with preimplementation (P = .004). Mean physician costs followed a similar trajectory from preimplementation ($18425) to partial implementation ($24101) to full implementation ($22578; P = .0006 [versus preimplementation]). CONCLUSIONS: A hospitalist comanagement program can significantly affect the care of medically complex children undergoing spinal fusion surgery. Initial program costs may increase.

Correction of tibial deformity in adults.

This report from five hospitals in Japan describes the results of correcting adult tibial deformities using external fixation. There were 49 patients with 59 lower limb deformities, with trauma being the most common cause of the deformity. Varus angulation was the most common deformity, and the most common magnitude was 11 degrees -30 degrees. Twenty-two patients had a leg-length discrepancy. The aim of the correction was to normalize both the mechanical axis and the inclination of the knee and ankle joints. In 63% of the patients corrections were performed gradually during bone lengthening or acutely after bone lengthening. Altogether, 71% of the patients were completely corrected, and no leg-length discrepancies remained after correction in 47%. Complications were encountered in 22 patients, about half of which were pin tract infections, 28% refractures, and the remainder delayed consolidation or fixator failure. There were no neurological or circulatory complications. The average fixation duration was 9 months. The average hospital charges were 3,740,000 yen in bilateral correction patients and 1,940,000 yen in unilateral correction patients. External fixation can correct not only the mechanical axis and joint inclination but also leg-length discrepancy simultaneously.