The nurse is assisting a physician during a prenatal examination. The physician seeks to estimate the adequacy of the patient's pelvis for birth. The nurse understands that the physician will need to perform which measurement vaginally?
1. True conjugate
2. Diagonal conjugate
3. Transverse outlet diameter
4. Obstetrical conjugate
Correct Answer: 2
Rationale 1: The true conjugate is a measurement of the pelvic inlet and cannot be directly measured.
Rationale 2: The diagonal conjugate is measured from the lower edge of the symphysis to the sacral promontory.
Rationale 3: The transverse outlet diameter is measured externally.
Rationale 4: The obstetrical is a measurement of the pelvic inlet and cannot be directly measured.
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