Humerus Shaft Fractures in Leisure Sport 'Flyfish Riding' - 4 Cases Report -

Bong Gun Lee; Ki Chul Park; Youn Ho Choi; Woo Sung Jung; Kyu Tae Hwang

doi:10.12671/jkfs.2012.25.4.327

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Lee, Park, Choi, Jung, and Hwang: Humerus Shaft Fractures in Leisure Sport 'Flyfish Riding' - 4 Cases Report -

Case Report

Journal of the Korean Fracture Society

Journal of the Korean Fracture Society 2012; 25(4): 327-330.

Published online: 19 October 2012

DOI: https://doi.org/10.12671/jkfs.2012.25.4.327

Humerus Shaft Fractures in Leisure Sport 'Flyfish Riding' - 4 Cases Report -

Bong Gun Lee, M.D., Ki Chul Park, M.D., Youn Ho Choi, M.D., Woo Sung Jung, M.D.^*, Kyu Tae Hwang, M.D.

Department of Orthopaedic Surgery, College of Medicine, Hanyang University, Seoul, Korea.

^*Saeum Hospital, Seoul, Korea.

Address reprint requests to: Kyu Tae Hwang, M.D. Department of Orthopaedic Surgery, Hanyang University Hospital, 17 Haengdang-dong, Seongdong-gu, Seoul 133-792, Korea. Tel: 82-2-2290-8458, Fax: 82-2-2299-3774, rubyhk@naver.com

Received 25 May 2012 Revised 2 July 2012 Accepted 19 August 2012

Abstract

A fracture of the humeral shaft can occur by direct or indirect injury. Most occur as a result of direct injury mechanisms such as falls from a height, direct blows, and traffic accidents. Recently, the population enjoying watersports for leisure is increasing and 'flyfish riding', in which passengers ride an inflatable raft drawn by a motorboat, may cause humeral shaft fracture as twisting and axial compression forces occur on the humeral shaft while boarding. Accordingly, the incidence of humeral shaft fracture is expected to increase as more people are expected to enjoy leisure sport activities such as 'flyfish riding'. We report 4 cases of humeral fracture that occurred during this activity in the year 2011.

Keywords: Humerus Fracture, Leisure sport, Flyfish

Figures and Tables

Fig. 1

(A) A largeinflatable raft (flyfish) is connected to a motorboat by rope. When the motor boat increases its speed, the flyfish floats over the water.

(B) Flyfish riders hold on to strips in a position of 90° flexion of the elbow and 45° external rotation and mild degrees of abduction of the shoulder.

Fig. 2

Anteroposterior radiographs show distal 1/3 humerus spiral fracture with butterfly fragment in all cases.

Fig. 3

(A) Preoperative radiograph shows distal 1/3 humerus spiral fracture with butterfly fragment.

(B) Immediate postoperative radiograph shows interfragmentary fixation with 1 cortical screw and plate fixation.

(C) Ten weeks after surgery, complete bone union is noted on anteroposterior radiograph.

Fig. 4

Internal rotator of the arm and flexor of the elbow may generate twisting and axial compression forces on the humerus. These forces may cause the humeral spiral fracture with butterfly fragment.

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