Question 1 · Medium
A woman at 7 weeks by dates has sudden lower abdominal pain, pain in her right shoulder tip and dizziness. The shoulder-tip pain most likely comes from:
- ABlood in the peritoneum irritating the diaphragm
- BMuscle strain from repeated heavy vomiting
- CReferred pain from a urinary tract infection
- DGas pains from early pregnancy constipation
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Answer: A · Blood in the peritoneum irritating the diaphragm
Shoulder-tip pain in early pregnancy with abdominal pain and dizziness suggests a ruptured ectopic pregnancy. Blood in the peritoneal cavity irritates the diaphragm, and the pain is referred along the phrenic nerve (C3-C5) to the shoulder. This is an emergency because bleeding can be heavy. The nurse checks vital signs, inserts IV access and alerts the team.
- B: Vomiting may strain abdominal muscles but does not explain dizziness and shoulder pain.
- C: A urinary infection causes loin or suprapubic pain, not shoulder-tip pain.
- D: Constipation does not cause shoulder-tip pain or dizziness.