Ahmed I Hammouda1,2, Shawn C Standard1, S Robert Rozbruch3, John E Herzenberg1. 1. International Center for Limb Lengthening,Rubin Institute for Advanced Orthopedics,, Sinai Hospital of Baltimore, 2401 West Belvedere Avenue, Baltimore, MD 21215 USA. 2. Department of Orthopaedic Surgery, Al-Azhar University, Cairo, Egypt. 3. Hospital for Special Surgery, New York, NY USA.
Abstract
BACKGROUND: Different types of external fixators have been used for humeral lengthening with successful outcomes reported in literature. Motorized intramedullary (IM) lengthening nails have been developed as an alternative to external fixators for long bone lengthening in the lower extremity. QUESTIONS/PURPOSES: This case series reports on using the new technology of IM lengthening nails for humeral lengthening. We assessed the radiological healing and functional outcomes after using the PRECICE IM nail for humeral lengthening. METHODS: This multicenter retrospective study included a total of six humeri in five patients (mean age was 20 years) that underwent lengthening with the magnetic IM PRECICE nail in two centers in the USA. The etiology was humeral growth arrest post-bone cyst (two segments), post-septic growth arrest (two segments), and multiple hereditary exostosis (bilateral segments in one patient). The outcomes measured were the length achieved, distraction index (DI; the length achieved in mm divided by the duration of lengthening in days), consolidation index (CI; number of days from surgery until consolidation divided by the length of the regenerate in cm), complications encountered, and functional outcomes (shoulder and elbow range of motion, the upper extremity functional index (UEFI), and QuickDASH functional scores). RESULTS: The mean follow-up period was 1.8 years (0.9 to 2.4 years). All segments achieved the goal of lengthening; the mean was 5.1 cm (4.5 to 5.8 cm). Mean DI was 0.7 mm/day (0.5 to 0.8). Mean CI was 36 days/cm (25 to 45 days/cm). No complications were observed. At the last follow-up, all patients maintained their preoperative range of motion (ROM) except one patient had reduced shoulder ROM. QuickDASH score and upper extremity functional index showed postoperative improvement compared to the preoperative scores. CONCLUSION: IM lengthening nails can provide successful and safe humeral lengthening. Specifically, the PRECICE nail has accurate control over the lengthening process.
BACKGROUND: Different types of external fixators have been used for humeral lengthening with successful outcomes reported in literature. Motorized intramedullary (IM) lengthening nails have been developed as an alternative to external fixators for long bone lengthening in the lower extremity. QUESTIONS/PURPOSES: This case series reports on using the new technology of IM lengthening nails for humeral lengthening. We assessed the radiological healing and functional outcomes after using the PRECICE IM nail for humeral lengthening. METHODS: This multicenter retrospective study included a total of six humeri in five patients (mean age was 20 years) that underwent lengthening with the magnetic IM PRECICE nail in two centers in the USA. The etiology was humeral growth arrest post-bone cyst (two segments), post-septic growth arrest (two segments), and multiple hereditary exostosis (bilateral segments in one patient). The outcomes measured were the length achieved, distraction index (DI; the length achieved in mm divided by the duration of lengthening in days), consolidation index (CI; number of days from surgery until consolidation divided by the length of the regenerate in cm), complications encountered, and functional outcomes (shoulder and elbow range of motion, the upper extremity functional index (UEFI), and QuickDASH functional scores). RESULTS: The mean follow-up period was 1.8 years (0.9 to 2.4 years). All segments achieved the goal of lengthening; the mean was 5.1 cm (4.5 to 5.8 cm). Mean DI was 0.7 mm/day (0.5 to 0.8). Mean CI was 36 days/cm (25 to 45 days/cm). No complications were observed. At the last follow-up, all patients maintained their preoperative range of motion (ROM) except one patient had reduced shoulder ROM. QuickDASH score and upper extremity functional index showed postoperative improvement compared to the preoperative scores. CONCLUSION: IM lengthening nails can provide successful and safe humeral lengthening. Specifically, the PRECICE nail has accurate control over the lengthening process.
Authors: Mohan V Belthur; Christopher A Iobst; Noam Bor; Eitan Segev; Mark Eidelman; Shawn C Standard; John E Herzenberg Journal: J Pediatr Orthop Date: 2016-09 Impact factor: 2.324
Authors: Andrea Laufer; Jan Duedal Rölfing; Georg Gosheger; Gregor Toporowski; Adrien Frommer; Robert Roedl; Bjoern Vogt Journal: Clin Orthop Relat Res Date: 2022-04-25 Impact factor: 4.755
Authors: Jessica C Rivera; Philip K McClure; Austin T Fragomen; Samir Mehta; S Robert Rozbruch; Janet D Conway Journal: J Orthop Trauma Date: 2021-08-01 Impact factor: 2.884