Android pelvis

Appeared in: KGMU 2024

Explanation

The Android pelvis is anatomically classified as the typical male-type pelvis.
It is characterized by a heart-shaped or triangular inlet, convergent side walls, and a narrow subpubic arch (less than 90 degrees).
This shape is less favorable for vaginal delivery compared to the gynecoid pelvis, as it can obstruct the descent and rotation of the fetal head.

Option B: This refers to the Gynecoid pelvis, which is the most common type in women (about 50%).
Option C: This is not a standard anatomical classification but a pathological deformity of the pelvis.
Option D: This is a general descriptive term, not a specific anatomical classification.

Visual 1: Diagram - A comparative illustration of the four main pelvic types (Gynecoid, Android, Anthropoid, Platypelloid) showing the shape of the pelvic inlet for each. This helps visualize why the Android pelvis is considered male-like and less favorable for delivery.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Caldwell-Moloy classification of pelvic types as background academic context rather than a clinical decision trigger.
Assessing the pelvic type is crucial in obstetrics to anticipate potential difficulties during labor and delivery. An Android pelvis can lead to a prolonged second stage of labor or obstructed labor, increasing the likelihood of operative delivery (forceps, vacuum, or cesarean section).
During a clinical pelvimetry examination, a nurse or midwife might suspect an Android pelvis if they feel prominent ischial spines and a narrow subpubic arch. This finding would prompt closer monitoring of labor progress.
What if? If a woman had a Gynecoid pelvis instead, the prognosis for a spontaneous vaginal delivery would be much more favorable, as its round shape and wide dimensions are ideal for the fetal head to pass through.

How to Approach the Question

This is a factual recall question from obstetrics.
First, identify the term 'Android pelvis' as the core of the question.
Recall the Caldwell-Moloy classification of pelvic shapes, which includes four main types.
Associate each type with its common name and characteristics: Gynecoid (female), Android (male), Anthropoid (ape-like), and Platypelloid (flat).
Based on this classification, 'Android pelvis' directly corresponds to 'Male pelvis'.
Evaluate the other options to confirm they are incorrect. 'Female pelvis' is Gynecoid, 'Richetic pelvis' is a disease state, and 'Narrow pelvis' is a non-specific description.

Concept Tested & Keywords

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Practise the full KGMU 2024

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