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Table 2 Results by device type

From: Using a Powered Bone Marrow Biopsy System Results in Shorter Procedures, Causes Less Residual Pain to Adult Patients, and Yields Larger Specimens

Device Efficacy Manual Powered p-value
Able to acquire biopsy core specimen 98.0% 90.4% 0.205
Mean number attempts for core acquisition 1.5 ± 0.8 1.2 ± 0.5 0.112
Mean time core acquisition (seconds) 203.1 ± 149.5 102.1 ± 85.4 0.000*
Patient Pain Scores Manual Powered p-value
Mean VAS needle insertion (0-10) 3.2 ± 2.9 3.1 ± 3.1 0.900
Mean VAS overall (0-10) 3.5 ± 2.3 3.8 ± 2.8 0.623
Pain-free patients 24 hours post procedure 33.3% 66.7% 0.003*
Pain-free patients 7 days post procedure 76.1% 82.6% 0.607
Satisfaction & Complications Manual Powered p-value
Operator satisfaction (0-10) 7.8 ± 2.1 8.1 ± 1.7 0.488
Patient satisfaction (0-10) 9.3 ± 1.6 9.4 ± 1.2 0.778
Device related complications 0% 3.8% 0.495
Core Biopsy Pathology Assessment Manual Powered p-value
Mean length (mm) 11.0 ± 5.5 13.3 ± 6.6 0.368
Mean width (mm) 1.3 ± 0.5 1.7 ± 0.5 0.123
Mean volume (mm3) 20.4 ± 9.0 36.8 ± 21.2 0.039*
General quality excellent/good 80.0% 66.7% 0.628
Medullary quality excellent/good 70.0% 55.6% 0.650
Overall quality rated adequate 70.0% 77.8% 1.000
  1. *denotes statistical significance