Acute Lunar Kidney Stone Disease
Earth designation: Acute Nephrolithiasis
Acute presentation of Nephrolithiasis in lunar residents. Kidney stone formation, significantly elevated in lunar residents from dehydration, altered calcium metabolism in low gravity, vitamin D supplementation effects, and immobility during EVA preparation. Kidney stones in a lunar medical bay without urological surgical capacity present a management chal...
Lunar Risk Factors
Chronic dehydration from EVA and habitat conditions. Hypercalciuria from bone resorption in low gravity. Vitamin D supplementation increasing calcium absorption. Reduced physical activity. Acidic urine from high-protein diet.
Symptoms
Severe colicky flank pain, hematuria, nausea, vomiting, fever if infected.
Diagnosis
Clinical (classic presentation), urinalysis (hematuria, crystals), portable ultrasound (hydronephrosis), X-ray for calcifications.
Treatment
Analgesics, hydration, alpha-blockers for passage, lithotripsy or ureteroscopy for stones not passing.
Lunar Medical Bay Protocol
Pain management: ketorolac IM and morphine. IV hydration (1L NS over 1 hour). Tamsulosin 0.4mg daily (alpha-blocker for stone passage). Strain urine for stone analysis. If fever: urgent antibiotics (ciprofloxacin) and telemedicine consultation — infected stone is urological emergency. Without lithotripsy: conservative management with mandatory evacuation planning for >10mm stone. Earth urology telemedicine for all cases.
Evacuation Criteria
Infected obstructing stone (urological emergency). Stone >10mm unlikely to pass. Uncontrolled pain despite maximum analgesia. Solitary kidney obstruction.
Prevention
Hydration protocol enforced (minimum 2.5L/day). Dietary calcium maintained at 800-1200mg (not zero — paradoxically prevents stones). Reduce dietary oxalate. Potassium citrate supplementation for high-risk residents.