Prosthesis loosening after THA is a rather common complication. For DDH patients with Crowe IV, the surgical risk and complexity is significant. THA with S-ROM prosthesis combined with subtrochanteric osteotomy is a common treatment. However, loosening of a modular femoral prosthesis (S-rom) is uncommon in THA and has a very low incidence. With modular prostheses distal prosthesis looseness are rarely reported. Non-union osteotomy is a common complication of subtrochanteric osteotomy. We report three patients with Crowe IV DDH who developed prosthesis loosening following THA with an S-ROM prosthesis and subtrochanteric osteotomy. We addressed the management of these patients and prosthesis loosening as likely underlying causes.

OBJECTIVE: Open reduction in developmental dysplasia of the hip (DDH) is regularly performed despite screening programmes, due to failure of treatment or late presentation. A protocol for open reduction of DDH has been refined through collaboration between surgical, anaesthetic, and nursing teams to allow same day discharge. The objective of this study was to determine the safety and feasibility of performing open reduction of DDH as a day case.
METHODS: A prospectively collected departmental database was visited. All consecutive surgical cases of DDH between June 2015 and March 2020 were collected. Closed reductions, bilateral cases, cases requiring corrective osteotomy, and children with comorbidities were excluded. Data collected included demographics, safety outcome measures (blood loss, complications, readmission, reduction confirmation), and feasibility for discharge according to the Face Legs Activity Cry Consolidability (FLACC) pain scale. A satisfaction questionnaire was filled by the carers. Descriptive statistics were used for analysis.
RESULTS: Out of 168 consecutive DDH cases, 16 patients fit the inclusion criteria (age range 10 to 26 months, 13 female). Intraoperative blood loss ranged from \"minimal\" to 120 ml, and there were no complications or readmissions. The FLACC score was 0 for all patients. The carers satisfaction questionnaire expressed high satisfaction from the experience with adequate information and support provided.
CONCLUSIONS: Open reduction in DDH, without corrective osteotomy, is safe and feasible to be managed as a day case procedure. It requires a clear treatment pathway, analgesia, sufficient counselling, and communication with carers. It is even more important during the COVID-19 pandemic when reduced length of hospital stay is likely to be safer for both patient and their parents. Cite this article: Bone Joint Open 2021;2(4):271-277.

BACKGROUND: Several complications have been reported following treatment of developmental dysplasia of the hip (DDH). Local muscular spasm is an extremely rare complication. This case serves to enlighten orthopedists about various and unique presentations of idiopathic local muscular spasm, natural history of such condition, and appropriate treatment.
METHODS: A two-year-old child presented with bilateral acetabular dysplasia for orthopedic evaluation and treated with bilateral simultaneous Dega osteotomy and postoperative cast for 12 weeks. Full range of motion (ROM) of both hips was regained three months after removal of the postoperative cast. Five months later, the child presented with apparent leg length discrepancy, and severe and painless global limitation of the right hip ROM, which initially was thought to be relapsed hip stiffness. Laboratory and radiological investigations were normal apart from pelvic obliquity on radiographs. Symptoms persisted for one month. Examination under anesthesia (EUA) was then performed and revealed full ROM of the involved hip. Physical therapy was started, and hip ROM fully recovered within 3 months without further intervention.
CONCLUSIONS: Stiffness, which is one of the most reported complications following surgical treatment of DDH, is usually related to lengthy periods of immobilization and/or surgical treatment. Clinically, local muscular spasm of the hip can mimic stiffness. EUA is invaluable to differentiate the common postoperative stiffness from the rare local muscular spasm.
CONCLUSIONS: Idiopathic local muscular spasm of hip might present clinically as stiffness that pose a diagnostic dilemma to the treating physician. Close observation coupled with physical therapy is sufficient.

UNASSIGNED: In this article we report the results of a pilot study analysing the implications of performing pelvic osteotomies for developmental dysplasia of the hip (DDH) as a day case. We assess the advantages of performing paediatric pelvic osteotomies as day-case procedures from a financial perspective and from an in-patient bed resource point of view.
UNASSIGNED: This was a prospective cohort study analysing Salter and Pemberton pelvic osteotomies performed for DDH over a three-year period from 1st January 2017 to 30th September 2019. All patients residing within 50 km of the hospital were eligible for day-case procedures. All other cases were performed as in-patients. A detailed financial costing analysis was performed and the in-patient resources utilized were documented and compared between the two models of care.
UNASSIGNED: In total, 84 Salter and Pemberton osteotomies were performed between 1st January 2017 to 30th September 2019. Of these cases, 35 were performed as day-case procedures. A total reduction in 70 in-patient bed days was reported. Total costs for a single in-patient requiring two nights of admission amounted to €5,752, whereas the discharge cost of a day case was reported at €2,670. The savings made by our institution amounted to €3,082 per day case. A total saving of €102,696 was made over three years. In all, seven day-case patients re-attended due to inadequate pain control. They required overnight admission and were discharged uneventfully the following day.
UNASSIGNED: Day-case pelvic osteotomies significantly reduce the number of in-patient bed days used in an elective paediatric orthopaedic setting. Significant financial savings in excess of €3,000 per case are possible. The introduction of day-case pelvic osteotomy procedures can significantly improve the cost-effectiveness of managing DDH provided there are clear protocols in place with close clinical follow-up.
UNASSIGNED: IV.