Ik heb er ook naar gezocht, maar er zijn meer onderzoeken die aantonen dat het niet werkt als andersom.
De onderzoeken die enige werking suggereren stellen als voorwaarden dat de 'suction' binnen enkele minuten toegepast dient te worden en dan gedurende 30..60 minuten volgehouden dient te worden.
De bronnen die de werking onderschrijven zijn de leveranciers en fabrikanten van dergelijke apparaten en outdoor winkels/organisaties, maar geen van hen refereert naar wetenschappelijk onderzoek.
Enige voorbeelden van conclusies bij de behandeling van bijten en steken (meestal slangenbeten):
Universiteit van CaliforniaAdministration of antivenin in a hospital is the most important treatment. Traditional first aid treatments -- applying ice, using a tourniquet, or applying suction to the wound -- have little value and may cause more injury.
Department of Emergency Medicine, University Medical Center, University of CaliforniaCONCLUSION: The Sawyer Extractor pump removed bloody fluid from our simulated snakebite wounds but removed virtually no mock venom, which suggests that suction is unlikely to be an effective treatment for reducing the total body venom burden after a venomous snakebite.
Public health Agency of CanadaConcerning first-aid measures in the field, it is important to stress up-to-date first-aid measures: the "dos" and "don'ts". Many old recommendations such as tourniquets and cutting and suctioning of the wound result in severe damage and sequelae, especially if bites cause significant local tissue injury. Negative pressure suction devices (e.g., "extractors") may mitigate the effect of envenoming and need for large doses of antivenin, but their effectiveness is still to be fully proven. Suction must be applied within minutes to be of any benefit.
Auerbach, PS, Donner HJ, Weiss EA. Field Guide to Wilderness Medicine. Mosby, 2003. pg 320.With regard to suction, a negative-pressure device called The Extractor (Sawyer Products) may remove a clinically significant amount of venom if it is applied over the bite within 3 minutes of the bite and left in place for 30 to 60 minutes. However, it may also promote local necrosis in the pattern of the applied suction."
Womans and Childrens Hospital Adalaide (
www.toxinology.com)
Most traditional, and many of the more recently fashionable, first aid measures are useless and potentially dangerous. These include local cauterization, incision, excision, amputation, suction by mouth, vacuum pump or syringe, combined incision and suction ("venom-ex" apparatus), injection or instillation of compounds such as potassium permanganate, phenol (carbolic soap) and trypsin, application of electric shocks or ice (cryotherapy), use of traditional herbal, folk and other remedies including the ingestion of emetic plant products and parts of the snake, multiple incisions, tattooing and so on.
Prins Leopold Instituut voor Tropische GeneeskundeInappropriate pre-hospital treatment, such as prolonged arterial tourniquet, incisions at the bite site and sustained aspiration by suction pumps, can cause major complications.
Medicine Online IncDon’t do these techniques:
Do not place any heat to the area. This will accelerate tissue destruction.
Do not apply any steroid creams to the area such as hydrocortisone cream.
Do not attempt to remove the spider venom with suction devices or cut out the affected tissue.
Sean P. Bush, MD From the Department of Emergency Medicine, Loma Linda University School of Medicine, Medical Center and Children’s Hospital, Loma Linda, CA."Snakebite Suction Devices Don’t Remove Venom: They Just Suck"
Kentucky Regional Poison Center of Kosair Children's HospitalAlthough some older studies have advocated incision and suction, this practice is fraught with danger. In addition to local skin, nerve or tendon damage, necrosis is promoted and increased wound infection rates may result. Commercial venom extractors have been shown to remove some venom in animal models. However, these devices have not been shown to decrease morbidity and mortality
Arkansas Herpetological Society (AHS). Evidence suggests that the application of a product called The Extractor does NOT provide any benefits, and may actually cause worse necrosis at the site of the bite.
The Oxford Textbook of Medicinesuction may introduce infection, damage tissues and cause persistent bleeding, and are unlikely to remove much venom from the wound. The vacuum extractor method is of unproven benefit in human patients and could damage soft tissues.
Robert Norris, MD,FACEP Associate Professor, Surgery Chief, Division of Emergency Medicine,Stanford UniversitySuction controversial:
- no proof of significant venom return
- might increase tissue loss at the bite site
- if used, best applied by mechanical means, should be started immediately and continued for 30-60 min
Wilderness Medical Society Conclusion.—No benefit was demonstrated from Extractor use for artificial rattlesnake envenomation in our animal study. The skin necrosis noted in 2 Extractor-treated extremities suggests that an injury pattern may be associated with the device.
