A nurse is reviewing the medical record for a client who is at 38 weeks of gestation, tested positive for group B streptococcus B-hemolytic, and is allergic to penicillin. The nurse should identify that which of the following medications is contraindicated for this client?

Answer: A. Potassium

Rationale:

A) Potassium:

Furosemide is a loop diuretic that can cause significant potassium loss through increased urine output. Monitoring potassium levels is crucial to prevent hypokalemia, which can lead to serious cardiac arrhythmias and muscle weakness. Ensuring potassium levels remain within a normal range helps maintain the infant's overall health and safety while on this medication.

B) WBC Count:

While it is important to monitor WBC count in various clinical situations, furosemide does not typically affect white blood cell levels. Therefore, monitoring WBC count is not specifically indicated for infants receiving furosemide unless there is another underlying condition that requires it.

C) Iron:

Iron levels are not typically affected by furosemide. Monitoring iron levels would be more relevant in cases of anemia or other hematologic conditions. Furosemide does not interfere with iron metabolism, so this test is not a priority for infants on this medication.

D) Amylase:

Amylase is an enzyme related to the pancreas and is typically monitored in conditions such as pancreatitis. Furosemide does not have a direct effect on amylase levels, so monitoring this enzyme is not necessary for infants receiving this diuretic. The focus should be on electrolytes, particularly potassium.

Answer: B. Stiff posture

Rationale:
A. Lip-smacking : Lip-smacking is not typically an indication of pain in newborns. It may be associated with hunger or neurological responses, but it does not directly indicate discomfort or pain caused by shoulder dystocia or other injuries.
B. Stiff posture : A stiff posture can indicate pain in newborns, as they often exhibit hypertonicity or rigidity when experiencing discomfort. This response is a protective mechanism and may suggest the newborn is reacting to pain from potential nerve or tissue damage caused by shoulder dystocia.
C. Weak cry : While a weak cry may indicate neurological or respiratory distress, it is not a specific sign of pain. In the context of shoulder dystocia, a weak cry could reflect complications such as brachial plexus injury but does not directly signify the presence of pain.
D. Tongue-darting : Tongue-darting is more commonly associated with neurological issues or feeding difficulties rather than pain. It is not a typical behavioral response to discomfort or injury in newborns experiencing complications like shoulder dystocia.