Vitamin D and Bone Homeostasis in Ortho Polytrauma Patients
Vitamin D and Bone Homeostasis in Ortho Polytrauma Patients
Although vitamin D is known to play a major role in multiple organ functions in healthy
 adults, including bone homeostasis, its role in the unique population of orthopaedic
 polytrauma patients has not been well described. The aim of this therapeutic randomized
 placebo-controlled feasibility study is to determine the effect of vitamin D supplementation
 initiated on admission on patients' 25(OH)-D level, bone turnover markers, and clinical
 outcomes in a cohort of adult orthopaedic polytrauma patients. Polytrauma patients with one
 or more orthopaedic injuries admitted to an urban Level I trauma center will be screened for
 eligibility based upon strict inclusion and exclusion criteria. Sixty patients meeting the
 criteria will be consented, enrolled and randomized in a 1:1 ratio to intervention and
 control (placebo) arm. Baseline 25(OH)-D and bone turnover marker levels will be drawn for
 all the patients on admission, and the intervention arm will receive a one-time dose of
 ergocalciferol (Vitamin D2) 400,000 IU shortly after enrollment. The labs will be repeated 7
 days after the initial draw or at discharge, whichever occurs first. Patients' daily
 immobilization status, baseline characteristics and clinical outcomes will be recorded.
 Statistical methods will be used to assess whether there is a difference in 25(OH)-D and bone
 turnover markers levels associated with the intervention.
Sixty polytrauma patients presenting to Jacobi Medical Center will be screened for
 eligibility according to strict inclusion and exclusion criteria by study personnel on
 admission. Medical history, physical examination, and laboratory findings will be collected
 and assessed to ensure that patients meet the inclusion and exclusion criteria. Eligible
 subjects will be enrolled after obtaining informed consent from either the subject or health
 care proxy if the subject is not able to participate in the decision-making process secondary
 to his injuries or mental status. As this dose of vitamin D has not been previously studied
 in pregnant subjects, female subjects will be counseled on potential pregnancy risks and will
 undergo urine pregnancy testing prior to administration of the investigational agent/placebo.
 Female patients testing positive for pregnancy will be removed from the study. Upon
 enrollment, study personnel will assign subjects a study ID and record this information in a
 password-protected data collection document.

 All enrolled subjects will have blood draws by phlebotomy or nursing staff for the
 above-mentioned bone turnover markers once consent is obtained. This will include specimen
 collection and processing for the following serum levels in both study arms: 25(OH)-D, PTH,
 collagen type I C-telopeptide, calcium, phosphorus, osteocalcin, and alkaline phosphatase.
 This initial specimen collection will occur in the interval between 0 and 72 hours of
 hospital admission.

 Collected specimen will be assigned unique identifiers corresponding to patients' study IDs
 and delivered to core labs at Jacobi Medical Center. From there, the specimen will be sent to
 an outside testing facility (Northwell Laboratories, Lake Success, NY), where specimen
 processing will occur. Normal laboratory values will be established by the outside testing
 facility according to CLIA standards.

 The study personnel will liaise with the JMC Main or Satellite Pharmacy to alert them
 regarding newly enrolled study subjects. The pharmacist will then assign patients according
 to randomization algorithm in a 1:1 ratio to intervention and control arms, with 30 patients
 in each group by the end of the study accrual. The pharmacist will then prepare and transport
 the investigational agent or placebo to the subject's location for administration by nursing
 staff.

 The intervention cohort will receive 400,000IU liquid ergocalciferol (50cc of 8000IU/cc
 Calcidol solution) via oral, NG tube, or gastrostomy route.

 The control cohort will receive 50cc of propylene glycol as placebo via oral, NG tube, or
 gastrostomy route.

 A repeat specimen collection of above-mentioned bone turnover markers will commence either at
 7 days if patient is still inpatient, or at discharge, whichever occurs first. The specimens
 obtained at that time will be treated in the same manner as the initial specimens.

 For each enrolled subject, the investigators will collect data from hospital presentation to
 discharge on standard demographics, routine laboratory results, clinical and injury
 characteristics and hospital course data (length of stay, in-hospital mortality, mobilization
 status, associated inpatient procedures and complications).
Inclusion Criteria:

 1. Males and females age 18-65 years

 2. One or more orthopaedic injuries on admission

 3. Admission injury severity score (ISS)≥16

 4. Anticipated stay in hospital of more than 7 days

 Exclusion Criteria:

 1. Pregnancy (if patient becomes pregnant during the study, she will be removed from the
 study)

 2. End stage kidney disease

 3. Patients on furosemide, thiazide, or corticosteroid therapy

 4. Patients with chronic liver disease

 5. Patients with recent history of vitamin D supplementation more than 5000 IU/day

 6. Patients actively undergoing chemo- or immunotherapy

 7. Patients with hematologic and solid malignancies

 8. Patients receiving treatment for osteoporosis

 9. Patients with "nothing per mouth" status secondary to any preceding procedures
 involving their GI system (e.g. patients with colectomy performed on this admission
 secondary to gunshot wound to abdomen)