Utility of 2.0 mm diameter Kirschner wires assembled with Wu's Tension Traction Bows in calcaneal skeletal traction.

The 3.5 mm diameter or thicker Steinmann pins were commonly used in skeletal traction, which are so highly invasive that may result in severe complications such as pin tract infection and iatrogenic calcaneus fractures. Accordingly, Xirui Wu designed a new type of tension traction bow that can be assembled with 2.0 mm diameter Kirschner wires, but its effectiveness is unclear. We aim to evaluate the effectiveness of 2.0 mm diameter Kirschner wires assembled with Wu's Tension Traction Bows in calcaneal skeletal traction. Data of 65 patients who were admitted to our department with tibia fractures from January 2021 to June 2022 and underwent preoperative calcaneal skeletal traction were collected retrospectively. 36 patients treated with 2.0 mm diameter Kirschner wires assembled with Wu's Tension Traction Bows were assigned into Group 1, and 29 patients treated with 3.5 mm diameter Steinmann pins assembled with Bohler's traction bows were assigned into Group 2. Pins loosening, breakage, and calcaneus fractures occurred in neither group. No statistical differences were observed in traction weight, swelling reduction efficacy, and traction duration (P > 0.05). Statistically significant differences were found between the two groups in term of post-traction bleeding incidence, average bleeding duration, and mean size and healing time of traction wounds (P < 0.05). Though VAS pain score before traction and on the first two days after traction in Group 1 didn't differ from Group 2 (P > 0.05), it was significantly lower in Group 1 compared to Group 2 on the third day after traction (P = 0.030). This study demonstrates that 2.0 mm diameter Kirschner wires assembled with Wu's Tension Traction Bows produce satisfied traction outcomes with less invasion and are recommended in calcaneal skeletal traction.