Lactation: a red breast on day 12 — structured SAQ (15 marks)

(a) Spectrum placement and initial management (5 marks)

Award a mark for the spectrum placement, a mark for each named conservative measure with dose, a mark for continued feeding, a mark for the 24-hour reassessment principle, and a mark for NOT starting antibiotics immediately. ^[1]

• This is inflammatory mastitis — a wedge-shaped erythema with systemic symptoms but no fluctuant collection — on the mastitis spectrum, short of confirmed bacterial infection at this stage.^[1]
• Conservative first: continue feeding to the infant's needs (not more); ice applied as often as hourly; ibuprofen 800 mg every 8 hours and paracetamol 1000 mg every 8 hours for inflammation and pain; a well-fitted supportive bra; consider sunflower or soy lecithin 5 to 10 g daily orally.^[1]
• Address the cracked nipple — fix attachment first; lanolin, expressed breast milk, or moist wound healing.^[1]
• Reassess at 24 hours before starting antibiotics, because most inflammatory mastitis is improving by then.^[1][2]

(b) Antibiotic regimen at 24 hours (4 marks)

One mark for the first-line agent with dose and duration; one for an alternative; one for a second-line option; one for stating the Cochrane evidential position and continuing feeding. ^[1][2]

• First line: dicloxacillin or flucloxacillin 500 mg four times daily for 10 to 14 days — low relative infant dose, the ANZ default.^[1]
• First-line alternative: cephalexin 500 mg four times daily for 10 to 14 days.^[1]
• Second line: clindamycin 300 mg four times daily for 10 to 14 days for penicillin allergy or suspected resistant organism; or trimethoprim-sulfamethoxazole double strength twice daily, avoiding where the infant has G6PD deficiency.^[1]
• The Cochrane review found insufficient evidence to confirm or refute antibiotic effectiveness, which is why the treatment decision is clinical and made at 24 hours, not automatic. Continue breastfeeding.^[2]

(c) Investigation and management of the abscess (3 marks)

Award a mark for ultrasound, a mark for drainage method, a mark for continued feeding and antibiotic adjunct. ^[4][3]

• Breast ultrasound is the key investigation — it distinguishes abscess from phlegmon from galactocele and guides intervention. Image any breast that has not settled within 48 hours of correct treatment.^[4]
• Ultrasound-guided needle aspiration with culture is the usual first intervention; drain or skin-stent placement at the index procedure is increasingly favoured for definitive management. Drains go to gravity, not suction; never apply a vacuum-assisted wound device to a lactating breast.^[1][4]
• Continue breastfeeding from the affected breast after drainage — the milk fistula rate is under 2 per cent, and stopping is worse for the breast and the dyad. Antibiotics are the adjunct, commonly 10 to 14 days.^[1][3]

(d) The 2022 reversals (3 marks)

One mark for each correctly stated reversal with its principle, up to three. ^[1][5]

• Stop deep massage — it increases oedema and inflammation and can propagate phlegmon; gentle lymphatic drainage toward the axilla is acceptable, vigorous massage and devices are not.
• Stop applying heat and 'emptying the breast' by pumping between feeds — both upregulate supply and perpetuate the inflammatory cycle through the local feedback inhibitor of lactation.
• Stop unroofing nipple blebs — use oral lecithin and a moderate-potency topical steroid such as 0.1 per cent triamcinolone instead.
• (Alternative) Stop reflex antibiotics at the first red breast — reassess at 24 hours to avoid overtreatment and resistance.^[1]