Safety and Feasibility of Rehabilitation Interventions in Children Undergoing Hematopoietic Stem Cell Transplant With Thrombocytopenia.

OBJECTIVE: To analyze the relation between platelet counts, intensities of physical therapy (PT) and occupational therapy (OT) services received, and frequencies of bleeding complications in children undergoing hematopoietic stem cell transplant (HSCT) during a period of severe thrombocytopenia. DESIGN: Retrospective review study. SETTING: Tertiary care hospital. PARTICIPANTS: Children (N=63; age, <18y) hospitalized for HSCT in 2010 and 2011 who received PT and OT services while markedly thrombocytopenic (platelet count, ≤50K/mcL). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Intensities of PT and OT interventions, patients' platelet counts on specific therapy days, and any bleeding events (minor or major) that occurred during or shortly after rehabilitation interventions. RESULTS: Sixty-two patients (accounting for 63 HSCTs) met the criteria for analysis. Fifty-six of these patients (57 HSCTs) underwent PT and/or OT while markedly thrombocytopenic. There was no correlation between platelet counts and intensities of rehabilitation interventions. There were no major bleeding events. There was no association between minor bleeding events and intensities of PT or OT interventions and no association between minor bleeding events and platelet counts. Only 5 minor bleeding events occurred during or after moderate or intensive therapy out of 346 PT and OT sessions (1.5%). CONCLUSIONS: The results of our study suggest that bleeding complications during or after mobilization and supervised exercise during PT and OT in children with severe thrombocytopenia undergoing HSCT are minor and relatively rare. These are encouraging results for both patients and rehabilitation specialists treating this population who is at high risk of developing immobility-related complications.

Prognostic Importance of Pretransplant Functional Capacity After Allogeneic Hematopoietic Cell Transplantation.

BACKGROUND: The purpose of this study was to investigate the prognostic importance of functional capacity in patients undergoing allogeneic hematopoietic cell transplantation (HCT) for hematological malignancies. PATIENTS AND METHODS: Using a retrospective design, 407 patients completed a 6-minute walk distance (6 MWD) test to assess functional capacity before HCT; 193 (47%) completed a 6 MWD test after hospital discharge. Cox proportional hazards regression was used to estimate the risk of nonrelapse mortality (NRM) and overall survival (OS) according to the 6 MWD category (<400 m vs. ≥ 400 m) and the change in 6 MWD (before HCT to discharge) with or without adjustment for Karnofsky performance status (KPS), age, and other prognostic markers. RESULTS: Compared with <400 m, the unadjusted hazard ratio for NRM was 0.65 (95% confidence interval, 0.44-0.96) for a 6 MWD ≥ 400 m. A 6 MWD of ≥ 400 m provided incremental information on the prediction of NRM with adjustment for age (p = .032) but not KPS alone (p = .062) or adjustment for other prognostic markers (p = .099). A significant association was found between the 6 MWD and OS (p = .027). A 6 MWD of ≥ 400 m provided incremental information on the prediction of OS with adjustment for age (p = .032) but not for other prognostic markers (p > .05 for all). Patients presenting with a pre-HCT 6 MWD of <400 m and experiencing a decline in 6 MWD had the highest risk of NRM. CONCLUSION: The 6 MWD is a significant univariate predictor of clinical outcomes but did not provide prognostic information beyond that of traditional prognostic markers in HCT. IMPLICATIONS FOR PRACTICE: The pretransplant 6-minute walk test is a significant univariate predictor of clinical outcomes in hematological patients beyond age but not beyond that of performance status. On this basis, 6-minute walk distance testing should not be considered part of the standard battery of assessments for risk stratification before hematopoietic cell transplantation.