A nurse is planning care for a newborn who is scheduled to start phototherapy using a lamp. Which of the following actions should the nurse include in the plan?

Choice A rationale:

Measuring the abdominal circumference at the level of the newborn's umbilicus every 12 hr is a critical action in this scenario. The newborn has necrotizing enterocolitis (NEC), a serious gastrointestinal condition, and measuring abdominal circumference can help monitor for changes in abdominal distention, which is a sign of NEC progression.

Choice B rationale:

Inserting an orogastric decompression tube with low wall suction may not be the most appropriate action for a newborn with NEC. While decompression tubes can be used in some cases of NEC, their insertion should be guided by specific clinical indications, and not all cases require them.

Choice C rationale:

Providing the newborn with an iron-rich formula containing vitamin B12 every 2 hr is not indicated for NEC. NEC requires specialized medical management and treatment, which may include bowel rest and other interventions, but providing iron-rich formula is not one of them.

Choice D rationale:

Administering nitric oxide inhalation therapy is not relevant to the management of NEC. Nitric oxide inhalation therapy is used for respiratory conditions, particularly persistent pulmonary hypertension of the newborn, and does not address the gastrointestinal issues seen in NEC.

The correct answer is c. Ampicillin.

Rationale:

• Group B Streptococcus (GBS) B-hemolyticis a bacterium that can colonize the vagina and rectum of pregnant women.While usually harmless to the mother,it can be passed to the newborn during birth and cause serious infections,including pneumonia,meningitis,and sepsis.
• Ampicillinis thefirst-line antibioticrecommended by the Centers for Disease Control and Prevention (CDC) for theprevention of GBS disease in newborns.It belongs to thepenicillin classof antibiotics,which are highly effective against GBS and generally well-tolerated by pregnant women and newborns.
• Doxycyclineis not recommended for GBS prophylaxis due to its poor penetration into amniotic fluid and potential for causing tooth discoloration and bone development problems in newborns.
• Cefotetanis an alternative option for women with penicillin allergy,but ampicillin is still preferred due to its lower cost and broader spectrum of activity against GBS strains.
• Fluconazoleis an antifungal medication and has no activity against GBS bacteria.

Detailed Rationale for Each Choice:

a. Doxycycline:

• Rationale against:
  • Poor penetration into amniotic fluid:Doxycycline does not effectively reach the amniotic sac,where the baby is surrounded,and therefore may not adequately protect the newborn from GBS infection.
  • Adverse effects in newborns:Doxycycline can cause tooth discoloration and bone development problems in infants exposed in utero.

b. Cefotetan:

• Rationale for:
  • Alternative for penicillin allergy:Cefotetan is a cephalosporin antibiotic effective against GBS and can be used in women with penicillin allergy.
• Rationale against:
  • Second-line option:Ampicillin is the preferred choice due to its lower cost and broader spectrum of activity against GBS strains.

c. Ampicillin:

• Rationale for:
  • First-line antibiotic:Ampicillin is the CDC-recommended first-line antibiotic for GBS prophylaxis due to its:
    • High effectiveness against GBS:Ampicillin has a broad spectrum of activity against GBS strains.
    • Good safety profile:Ampicillin is generally well-tolerated by pregnant women and newborns.
    • Cost-effectiveness:Ampicillin is a relatively inexpensive antibiotic compared to other options.

d. Fluconazole:

• Rationale against:
  • Antifungal medication:Fluconazole is an antifungal medication and has no activity against GBS,which is a bacterium.