<unk> s in medical packaging<unk>  improves healing in chronic ulcers. In diabetic foot ulcers there is tentative evidence of benefit. A Cochrane review of methods for the debridement of venous leg ulcers found<unk>  to be broadly as effective as most other methods, but the study also noted that the quality of data was poor. In 2004, the United States Food and Drug Administration (FDA) cleared<unk> s from common green bottle fly for use as a "medical device" in the US for the purpose of treatment of: * Non-healing necrotic skin and soft tissue wounds * Pressure ulcers * Venous stasis ulcers * Neuropathic foot ulcers * Non-healing traumatic or post-surgical wounds Limitations The wound must be of a type that can benefit from the application of<unk> . A moist, exudating wound with sufficient oxygen supply is a prerequisite. Not all wound-types are suitable: wounds which are dry, or open wounds of body cavities do not provide a good environment for<unk> s to feed. In some cases it may be possible to make a dry wound suitable for larval therapy by moistening it with saline soaks. Patients and doctors may find<unk> s distasteful, although studies have shown that this does not cause patients to refuse the offer of<unk> .<unk> s can be enclosed in opaque polymer bags to hide them from sight. Dressings must be designed to prevent any<unk> s from escaping, while allowing air to get to the<unk> s. Dressings are also designed to minimize the uncomfortable tickling sensation that the<unk> s often cause.
Maggot therapy
Ozone therapy
Helminthic therapy
Bridge therapy
Virotherapy
Narrative exposure therapy
Ultraviolet light therapy
Goeckerman therapy