Polyhydramnios is defined when amniotic fluid is:

RUHS, Jaipur, PB B.Sc Nursing Entrance-2020

Obstetrics & Gynaecology

Easy

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2020

Explanation

Polyhydramnios is an obstetric complication characterized by an excessive amount of amniotic fluid.
The established clinical definition for this condition is an amniotic fluid volume that exceeds 2000 mL during the second half of pregnancy.
This excess fluid can result from various underlying issues, including maternal diabetes (leading to fetal polyuria) or fetal anomalies that impair swallowing (like anencephaly or esophageal atresia), disrupting the normal balance of fluid production and removal.

Option A: This range (250 to 500 mL) represents an abnormally low volume of amniotic fluid, which is the definition of oligohydramnios, not polyhydramnios.
Option B: This range (500 to 1000 mL) is considered the normal volume of amniotic fluid during the third trimester, particularly around term.
Option C: While this volume (1000 to 1500 mL) is higher than the average normal range, it does not meet the clinical threshold of 2000 mL required to diagnose polyhydramnios.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition of Polyhydramnios based on amniotic fluid volume as background academic context rather than a clinical decision trigger.
Nurses must recognize the signs of polyhydramnios, such as a uterine size larger than expected for gestational age, maternal shortness of breath, and difficulty palpating fetal parts. This is crucial because the condition is associated with increased risks of preterm labor, premature rupture of membranes, placental abruption, and postpartum hemorrhage due to uterine atony.
Nursing management involves monitoring for maternal respiratory distress, assessing for signs of preterm labor, and preparing for potential complications during and after delivery.
What if? If a patient's Amniotic Fluid Index (AFI) on ultrasound is 26 cm, it is classified as mild polyhydramnios. While this doesn't directly equate to a volume over 2000 mL, it triggers increased surveillance for fetal well-being and maternal complications, even though many mild cases are idiopathic and resolve without intervention.

How to Approach the Question

This is a factual recall question that tests your knowledge of obstetric definitions.
First, identify the key term in the question stem: 'Polyhydramnios'.
Recall the meaning of the prefix 'poly-' which means 'many' or 'much', indicating an excess of something.
Access your knowledge base for the specific quantitative definition of polyhydramnios in terms of amniotic fluid volume.
Evaluate the given options, comparing them to the known normal and abnormal ranges.
Eliminate the options that represent low fluid volume (oligohydramnios) and normal fluid volume.

Concept Tested & Keywords

QLN7V3Z7OTHcNbekQVBf9z

E6 Anatomy Grays 43e Vol 1 Part 2 p. 11-13

E6 Obstetrics Williams p. 50-70