INTRODUCTION: Hair clippers are widely used to cut hair short at the occipital region for Asian school boys. A haircut as the cause of shunt dislodgement has not previously been reported. CASE REPORT: Two previously shunted boys presented with shunt dysfunction 1 to 2 days after a haircut during which hair clippers were used at the occipital region. Both of them have undergone shunt utilizing a three-piece system. During the operation, the distal catheter was found to be disconnected from the reservoir at the connector site in both patients. One patient recalled that he had felt pain and then heard a crack when the connector site of the reservoir was dislodged from the distal catheter at the postauricular region. Their ages at the time were 10 and 11 years, respectively. During the time period between this revision and the previous surgery, the patients exhibited increases in body height of 32 and 52 cm, respectively. DISCUSSION: We propose that when children are growing rapidly, the distal catheter is subjected to traction at the site of its connection with the reservoir. A haircut that includes the use of clippers at the occipital region causes a rapid increase in the shearing strain at the shunt connector site that may further stretch the shunt and induce shunt disconnection. Nurses and physicians must address the need to prevent shunt dislodgement caused by haircuts with clippers in young, rapidly growing, male patients who require shunts. A two- or one-piece shunt may prevent this complication. ; 醫學系外科 ; 醫學系 ; 醫學院 ; 期刊論文