In hypocontractile uterine dysfunction, the uterine basal tone is _______.

Appeared in: NHM UP Staff Nurse-2023 Shift-2nd

Explanation

Hypocontractile uterine dysfunction, also known as hypotonic dysfunction or uterine inertia, is defined by weak, inefficient uterine contractions.
A key characteristic of this condition is a normal or low resting pressure of the uterus between contractions, known as the basal tone.
The typical basal tone in hypotonic dysfunction is less than 10 mmHg.
Contractions are also weak, with peak pressures often failing to exceed 25 mmHg, which is insufficient for progressive cervical dilation.

Option A: A pressure of more than 50 mmHg represents the peak pressure of a strong, effective uterine contraction during normal labor, not the basal (resting) tone.
Option B: A basal tone of 25 mmHg is significantly elevated and is characteristic of hypertonic uterine dysfunction, not hypotonic dysfunction. In hypotonic dysfunction, 25 mmHg is the upper limit of the peak contraction pressure, not the resting tone.
Option C: A basal tone of 30 mmHg is extremely high and would be seen in severe cases of hypertonic uterine dysfunction or other complications like placental abruption, not in hypotonic dysfunction.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Uterine basal tone in hypocontractile uterine dysfunction as background academic context rather than a clinical decision trigger.
Nurses must be able to differentiate between hypotonic and hypertonic uterine dysfunction as the management is completely different and incorrect interventions can be harmful.
Failure to recognize and manage hypotonic dysfunction can lead to prolonged labor, maternal exhaustion, postpartum hemorrhage (due to an atonic uterus), and fetal distress.
Administering oxytocin is a key intervention for hypotonic dysfunction but is contraindicated in hypertonic dysfunction, where it would worsen uterine hypertonus and could lead to uterine rupture or fetal compromise.

How to Approach the Question

First, identify the key terms in the question: 'hypocontractile uterine dysfunction' and 'uterine basal tone'.
Recall the definition of 'hypocontractile' or 'hypotonic'. 'Hypo-' means low or under.
Understand that 'basal tone' refers to the resting pressure of the uterus between contractions.
Therefore, hypocontractile dysfunction implies a low resting tone and weak contractions.
Evaluate the options based on this understanding. 'Less than 10 mmHg' is a low pressure, consistent with a hypotonic state.
Eliminate the other options as they represent either high basal tones (characteristic of hypertonic dysfunction) or peak contraction pressures.

Concept Tested & Keywords

Qp94dngfYOrQqj4d10jc_Q

E6 Obstetrics Williams p. 30-50

E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 52-63

Practise the full NHM UP Staff Nurse-2023 Shift-2nd

Attempt every question from this paper in a timed mock, then review the full solution for each one.