Pressure used in suction & evacuation in MTP?

NORCET 5 Prelims - Sept 2023 (Shift-1)

Obstetrics and Midwifery Nursing

Easy

Appeared in: NORCET 5 Prelims - Sept 2023 (Shift-1)

Explanation

The standard negative pressure for Electric Vacuum Aspiration (EVA) for MTP is 400-600 mm Hg.
This pressure range provides the optimal balance between effectively removing the products of conception and ensuring patient safety.
Using the correct pressure minimizes the risk of uterine trauma, perforation, and excessive bleeding.
This procedure is distinct from Manual Vacuum Aspiration (MVA), which uses a much lower pressure (around 60 mm Hg).

Option A: A pressure of 200-300 mm Hg is generally considered too low for effective evacuation of the uterus.
Option C: A pressure of 600-800 mm Hg is excessively high for a standard EVA procedure.
Option D: A pressure of 800-1000 mm Hg is dangerously high and is never used in this procedure.

Visual 1: Diagram - A comparative diagram showing the setup for Electric Vacuum Aspiration (EVA) with its electric pump and a Manual Vacuum Aspiration (MVA) kit with its handheld syringe. This helps visualize the difference in equipment.
Visual 2: Chart - A chart illustrating the different pressure ranges for uterine aspiration. It should show the optimal range (400-600 mm Hg) as safe and effective, while highlighting lower ranges as 'ineffective' and higher ranges as 'dangerous/high-risk'.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pressure settings for suction evacuation in Medical Termination of Pregnancy (MTP) as background academic context rather than a clinical decision trigger.
A nurse's role includes preparing the suction apparatus, ensuring it is functioning correctly, and verifying the pressure setting with the physician before the procedure begins.
During the procedure, the nurse monitors the patient's vital signs, assesses blood loss, and provides emotional support. Post-procedure, the nurse monitors for signs of complications like hemorrhage, infection, or severe pain.
What if? If there is a power outage during an EVA procedure, the team must be prepared to switch to a Manual Vacuum Aspiration (MVA) kit, which does not require electricity. The nurse should know the location and setup of the MVA kit for such emergencies.

How to Approach the Question

First, identify the key terms in the question: 'Pressure', 'suction & evacuation', and 'MTP'. This points to a question about the technical parameters of a specific medical procedure.
Recognize that 'suction and evacuation' typically refers to Electric Vacuum Aspiration (EVA), which is different from Manual Vacuum Aspiration (MVA).
Recall the standard, safe, and effective negative pressure range for EVA used in first-trimester MTP.
Evaluate the given options to find the one that matches the standard range (400-600 mm Hg).
Eliminate other options by reasoning that lower pressures are ineffective and higher pressures are dangerous.

Concept Tested & Keywords

Concept Tested: Pressure settings for suction evacuation in Medical Termination of Pregnancy (MTP)
Stem keywords: Pressure, suction & evacuation, MTP
Lead-in keywords: BEST, MOST RELEVANT CLUE
Negative lead-in flag: false

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