Related Experiment Video
Updated: Aug 7, 2026

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
The anal position index: a simple method to define the normal position of the anus in neonate
Heidar Ali Davari1, Mehrdad Hosseinpour
1Department of Pediatric Surgery, Al-Zahra hospital, Esfahan, Iran.
Aim:
The purpose of this study was to determine the normal position of anus using anal position index (API) and the modified measurement method and to emphasize the importance of ectopic anus. This cross-sectional study was performed on 400 neonates equally, boys and girls who were all delivered at full term without any malformations. Anal position index, which is the ratio of anus-fourchette distance in girls and anus-scrotum distance in boys to the distance between coccyx and fourchette/scrotum, was calculated in all cases. To make correct measurements, transparent adhesive tape was used longitudinally on midperinum in a way that it covered the anus. Then fourchette/scrotum, anus center and the lower margin of coccyx were marked on it. Distances marked on each tape were then measured with the standard ruler. Mean+/-SD of API in girls was 0.45+/-0.08 (95% CI: 0.44-0.46) and in boys 0.54+/-0.07 (95% CI: 0.53-0.55). Mean+/-2 SD was considered as the normal range for an anus position. Six female and five male neonates who had abnormal APIs were investigated further.
Conclusions:
Our findings suggested a simple method for determination of normal position of anus in children, especially those who are referred for chronic constipation. API can never be considered as the sole indication for the surgical intervention.
More Related Videos
Related Concept Videos
Anatomical Positions
The body is upright, facing forward, and standing erect.
The feet are parallel and flat on the floor.
The arms are hanging by the...
Assessment of the Rectum and Anus
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
Assessing Body Temperature - Rectal
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...
Directional Terms
Temperature Measurement Sites
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...

