Vascular Impulse Technology versus elevation in the treatment of posttraumatic swelling of extremity fractures: study protocol for a randomized controlled trial

Table 2 Sample size calculation

Injury	Number of patients in 2014 at the study center	Number of patients included in the planned study
Calcaneal fracture (intra-articular)	119	40^a
Ankle fractures: type 44B/C	106	40^a
Tibial pilon fracture: type 43B/C	64	40^a
Distal radius fracture: type 23C	102	30^b
Tibial shaft fractures	100	30^b
Elbow dislocations (simple and complex)	55	16^b
Distal humeral fractures: type 13B/C	46	14^b
Proximal humeral fractures	99	30^b
Tibial head fractures: type 41B/C	138	40^b
Total		280

^asample size calculation are based on the results of Caschman et al. [20]; ^bsample size calculation based on the treated patients in 2014 in the study center

ISSN: 1745-6215