Change in Incisional Design in Primary Unilateral Cleft Lip Repair Under General Anesthesia.

Nasolabial features of infants with unilateral cleft lip (UCL) are different when they are under general anesthesia for lip repair compared to when they are awake. This study aimed to investigate changes in the incisional design of cheiloplasty according to patient position and anesthesia: upright and awake versus supine and under general anesthesia. Three-dimensional images of 20 infants with UCL were randomly selected. Two different incisional designs were drawn on the images captured while the infants were awake. Those incisional designs were anthropometrically compared to the designs drawn on the images captured while the infants were under general anesthesia. Under general anesthesia, vermillion height of both the medial and lateral sides of the cleft became significantly greater. In the rotation-advancement design, the incisional line of the rotation flap on the medial lip element became significantly shorter under general anesthesia, whereas the advancement flap on the lateral lip element was not significantly altered. In an anatomical subunit approximation, both lengths of the philtral ridge on the noncleft side and incisional line along the philtral ridge on the cleft side became significantly shorter under general anesthesia, but these alterations did not affect the calculation of the width of the small triangular flap on the lateral lip element. These changes in nasolabial features after general anesthesia may cause surgical error, which result in secondary cleft lip deformities. However, because these changes varied among infants, preoperative planning using three-dimensional facial images of infants who are awake may be able to avoid surgical error.