Sleep Science: Feb 22-28, 2026

This groundbreaking study combined clinical observations from 790 OSA patients with genetic (Mendelian randomization) analysis to investigate whether sleep apnea directly causes blood clotting problems. While severe OSA patients showed higher fibrinogen levels and shorter clotting times, these associations vanished after controlling for BMI. Genetic evidence revealed no direct causal link between OSA and hypercoagulability — obesity is the true culprit. The finding suggests that weight management, rather than CPAP alone, should be prioritized to reduce thrombotic risk in OSA patients.

Clinicians may be over-attributing thrombotic risk to OSA severity rather than the underlying obesity. Redirecting treatment focus toward weight loss could produce more meaningful reductions in blood clot risk for patients who have both conditions.

Researchers developed an AI-powered wearable patch that achieved 81.4% accuracy in screening for moderate-to-severe OSA (AHI ≥15) by analyzing heart rate patterns overnight. The adhesive patch continuously monitors heart rhythms and uses 375 different parameters — including heart rate complexity and ECG amplitude — to calculate a new "Cardiovascular Hypopnea Index" (CVHI). This non-invasive approach outperformed demographic-based screening (73%) and previous ECG methods (70.6%), offering a practical alternative to uncomfortable multi-wire home sleep tests for initial OSA screening and treatment monitoring.

Diagnostic friction is a leading reason OSA goes undetected. A comfortable single-patch device that monitors for up to a week could dramatically expand initial screening reach, particularly in settings where polysomnography access is limited or waitlists are long.

This comprehensive theoretical paper introduces DARC-NESS, a mastery-based cognitive-behavioral treatment framework for chronic nightmares in youth. The model identifies "nightmare efficacy" — a child's belief in their ability to manage nightmares — as the central therapeutic mechanism. Treatment combines relaxation skills, sleep hygiene, and nightmare rescripting, where children rewrite scary dreams with empowering endings. A detailed case study of a 15-year-old with multiple traumas demonstrated how addressing multiple pathways (worry boxes, diaphragmatic breathing, positive imagery on pillowcases) reduced nightmares from 4 per week to zero, alongside eliminating suicidal ideation.

Nightmare disorder affects a substantial proportion of children and adolescents yet receives limited clinical attention. A flexible, multi-pathway CBT framework that builds internal mastery rather than relying on a single technique addresses diverse trauma profiles and bridges the gap between pediatric sleep medicine and mental health care.