A postpartum client diagnosed with mastitis is prescribed antibiotic therapy. Which nursing intervention is most important to include in the client's care plan?

Continued breastfeeding or pumping prevents milk stasis, a key factor in mastitis, and supports healing. Other options, like stopping breastfeeding or applying cold compresses, can worsen engorgement and are not recommended as primary interventions.

Understanding the Pathophysiology of Mastitis
Mastitis is an inflammatory condition of the breast, often involving infection. In lactating individuals, it typically arises from milk stasis, which provides a culture medium for bacteria. The most common causative organism is Staphylococcus aureus, which enters through cracks or fissures in the nipple . The resulting inflammatory response leads to the classic signs of localized pain, erythema, warmth, and systemic symptoms such as fever and myalgia, as seen in this client. The fundamental principle of treatment is to eliminate the infection with antibiotics while simultaneously resolving the underlying milk stasis. If milk is not effectively removed, the infection can persist and progress to a breast abscess, a more serious complication requiring drainage .

Analyzing the Correct Answer: Continued Breastfeeding or Pumping
The most critical nursing intervention is to encourage continued breastfeeding or pumping to maintain milk flow and prevent engorgement. This directly addresses the primary non-infectious driver of the condition: milk stasis. Effective and frequent milk removal empties the breast, deprives bacteria of the stagnant milk they thrive on, and reduces intraductal pressure, which alleviates pain and prevents the formation of an abscess . It is a common misconception that the milk is infected and harmful to the infant; however, the antibacterial properties of breast milk, combined with the infant's gastric acidity, make it safe for continued feeding. Stopping milk removal abruptly would worsen engorgement and stasis, dramatically increasing the risk of abscess formation.

Why the Other Options are Incorrect
- Option 1: Advise the client to stop breastfeeding immediately. This is contraindicated. Abrupt cessation leads to severe engorgement and milk stasis, which exacerbates the infection and is a primary risk factor for developing a breast abscess . The therapeutic goal is to promote milk flow, not halt it.
- Option 2: Apply cold compresses to the affected breast. While cold compresses can provide symptomatic pain relief and reduce local edema between feedings, they do not address the root cause of milk stasis. This is a comfort measure, not the most important intervention. The priority must be milk removal. Furthermore, heat application before feeding is often more beneficial to promote let-down and milk flow.
- Option 3: Recommend pumping and discarding breast milk. This intervention is partially correct in that it promotes milk removal, but discarding the milk is unnecessary and based on outdated practice. The breast milk from a parent with mastitis is safe for the infant and contains antibodies and immunological components that are beneficial. Advising to discard the milk can also be logistically burdensome and may inadvertently lead to decreased frequency of milk removal, undermining the primary therapeutic goal. The most evidence-based approach is to continue direct breastfeeding or pump and feed the milk to the infant.

Clinical Integration and Imaging Correlation
The clinical assessment of mastitis is paramount, but imaging can help rule out complications. As noted in the pictorial review, ultrasound is the primary imaging modality for evaluating mastitis, as it can differentiate simple mastitis from a developing abscess without exposing the patient to ionizing radiation . On ultrasound, mastitis appears as ill-defined hyperechoic areas with increased vascularity on Doppler, while an abscess appears as a complex, hypoechoic or anechoic fluid collection with a thick, irregular wall. This distinction is critical because an abscess requires drainage and may necessitate a temporary pause in feeding from the affected side, which is a key complication the nursing care plan aims to prevent by prioritizing effective milk removal .