Mechanical Restraint Linked to Short-Term Blood Clot Risk in Psychiatric Hospitals

A Danish study published in *The BMJ* has identified a small but statistically significant association between the use of mechanical restraint and an elevated short-term risk of blood clots among psychiatric inpatients. The research, which analyzed data from national health registries between 2001 and 2019, found that patients subjected to mechanical restraint—such as restraints applied to limbs or torso—faced a 3.5-fold increased risk of developing deep vein thrombosis or pulmonary embolism within the first 24 hours post-restraint. However, the absolute risk remained low, with the incidence of blood clots rising from 0.03% to 0.08% in the restrained group.

The study, involving over 1.2 million psychiatric admissions, highlights the need for caution in balancing patient safety and restraint practices. While mechanical restraint is often used to manage acute behavioral crises, the findings underscore its potential to disrupt circulation, particularly in vulnerable populations. Researchers emphasize that the results reinforce existing calls to minimize restraint use and prioritize alternative de-escalation strategies. They also suggest that for patients requiring restraint, preventive measures such as early mobilization or anticoagulant therapies may warrant further investigation.

The authors caution that the observed association does not confirm causation but urges healthcare providers to remain vigilant. Given the low baseline risk of blood clots in psychiatric patients, they advocate for a nuanced approach, combining clinical judgment with evidence-based guidelines to reduce reliance on mechanical restraint. The study contributes to ongoing efforts to improve patient safety and align psychiatric care practices with broader medical standards.