Bed rest, also referred to as the rest-cure, is a medical treatment in which a person lies in bed for most of the time to try to cure an illness. Bed rest refers to voluntarily lying in bed as a treatment and not being confined to bed because of a health impairment which physically prevents leaving bed. The practice is still used although a 1999 systematic review found no benefits for any of the 17 conditions studied and no proven benefit for any conditions at all, beyond that imposed by symptoms.
In the United States, nearly 20% of pregnant women have some degree of restricted activity prescribed despite the growing data showing it to be dangerous, causing some experts to call its use "unethical".
Medical uses
Extended bed rest has been proven to be a potentially harmful treatment needing more careful evaluation.
Pregnancy
Women who are pregnant and are experiencing early labor, vaginal bleeding, and cervix complications have been prescribed bed rest. This practice in 2013 was strongly discouraged due to no evidence of benefit and evidence of potential harm.
Evidence is unclear if it affects the risk of preterm birth and due to potential side effects the practice is not routinely recommended. It is also not recommended for routine use in pregnant women with high blood pressure or to prevent miscarriage.
Women pregnant with twins or higher-order multiples are at higher risk for pregnancy complications. Routine bed rest in twin pregnancies (bed rest in the absence of complications) does not improve outcomes. Bed rest is therefore not recommended routinely in those with a multiple pregnancy.
Use in combination with assisted reproductive technology such as embryo transfer is also not recommended.
Back pain
For people with back pain bed rest has previously been recommended. Bed rest, however, is less beneficial than staying active. As a treatment for low back pain, bed rest should not be used for more than 48 hours.
Other
As of 2016 it is unclear if bed rest is useful for people in wheelchairs who have pressure ulcers. Bed rest may be sufficient treatment for mild cases of Sydenham chorea. In those with deep vein thrombosis early movement rather than bed rest appears helpful.
Adverse effects
Prolonged bed rest has long been known to have deleterious physiological effects, such as muscle atrophy and other forms of deconditioning such as arterial constriction. Besides lack of physical exercise it was shown that another important factor is that the hydrostatic pressure (caused by gravity) acts anomalously, resulting in altered distribution of body fluids. In other words, when getting up, this can cause an orthostatic hypertension, potentially inducing a vasovagal response.
Additionally, prolonged bed rest can lead to the formation of skin pressure ulcers. Even physical exercise in bed fails to address certain adverse effects.
Phlebothrombosis is marked by the formation of a clot in a vein without prior inflammation of the wall of the vein. It is associated with prolonged bed rest, surgery, pregnancy, and other conditions in which blood flow becomes sluggish or the blood coagulates more readily than normal. The affected area, usually the leg, may become swollen and tender. The danger is that the clot may become dislodged and travel to the lungs (a pulmonary embolism).
Technique
Complete bed rest refers to discouraging the person in treatment from sitting up for any reason, including daily activities like drinking water.
Placing the head of a bed lower than the foot is sometimes used as a means of simulating the physiology of spaceflight.
History
As a treatment, bed rest is mentioned in the earliest medical writings. The rest cure, or bed rest cure, was a 19th-century treatment for many mental disorders, particularly hysteria. "Taking to bed" and becoming an "invalid" for an indefinite period was a culturally accepted response to some of the adversities of life.
In addition to bed rest, patients were secluded from all family contact to reduce dependence on others. The only person who bed rest patients were allowed to see was the nurse who massaged, bathed, and clothed them. Not only were patients to be isolated in bed for an extended time, they were advised to avoid other activities that may mentally exhaust them such as writing or drawing.