Slark Hyperbaric Unit
Waitematā District Health Board
PO Box 32051
Devonport
Auckland 0744
New Zealand
www.healthpoint.co.nz
Slark Hyperbaric Unit | Waitematā | Te Whatu Ora
Postal Address
Contact Details
Emergency Referrals:
Diving Emergency Service (DES) 24 hours a day, 7 days a week:
Ph 0800 4 DES 111 (0800 4 337 111) or if outside New Zealand: Ph 64 9 3746758
Elective (non-emergency) Referrals:
Inpatients: SMO please complete e-referral in Clinical Portal. If you wish to discuss appropriateness of referral, please contact Clinical Director, Dr Chris Sames on 021 1255687.
Other patients: Medical staff please click on the following link to open the referral form and complete all details and email it to Dr Chris Sames at chris.sames@waitematadhb.govt.nz
Tours and Technical Information:
Phone: (09) 4872213
Or contact online here
Dive Medicals:
Occupational & Recreational: Dr Chris Sames
Contact online here
Diver Alert Network:
Oxygen Provider Training: Basil Murphy
Contact online here
Necrotising Soft Tissue Infections
A number of types of infections of soft tissue may benefit from adjunct treatment with hyperbaric oxygen and are included in the category of “necrotizing soft tissue infections.” Names of such clinical syndromes include crepitant anaerobic cellulitis, progressive bacterial gangrene, necrotizing fasciitis, and nonclostridial myonecrosis. Gas gangrene (Clostridial myositis and myonecrosis) is a separate entity and is reviewed elsewhere in this site.
Necrotizing soft tissue infections may result from either a single strain or a mixed population of bacteria, typically occurring after trauma, surgery, and/or around foreign bodies. The individual affected by such infections is frequently compromised by conditions such as diabetes or vascular disease.
In addition to pre-existing host compromise, necrotizing soft tissue infections themselves may induce conditions adverse to control of the infection by normal host defence mechanisms. The infections commonly lower tissue oxygen levels, impairing the ability of the white blood cells (neutrophils) to fight infection. Toxins produced by bacteria involved may also inhibit neutrophil activity.
The primary treatments for necrotizing soft tissue infection are surgical excision of infected tissue and administration of appropriate antibiotics. In selected cases, addition of hyperbaric oxygen therapy may be both lifesaving and cost effective. Hyperbaric oxygen may be beneficial in several ways. Some of the bacteria involved in necrotizing soft tissue infections are “anaerobic,” growing most rapidly in a low oxygen environment. In the hyperbaric chamber, tissue oxygen levels may be raised sufficiently to inhibit bacterial growth. In addition, hyperbaric oxygen treatment may enhance the ability of neutrophils to kill bacteria, by a number of different mechanisms.
The use of hyperbaric oxygen for treatment of necrotizing soft tissue infections should be individualised. In specific instances where risk of morbidity and mortality are high, adjunct hyperbaric oxygen therapy should be considered.
References
1. Mader JT, Adams KR, Sutton TE. Infectious diseases: Pathophysiology and mechanisms of hyperbaric oxygen. J Hyperbaric Med 1987;2:133-140.
2. Knighton DR, Fiegel VD, Halverson T, Schneider S, Brown T, Wells CL. Oxygen as an antibiotic: The effect of inspired oxygen on bacterial clearance. Arch Surg 1990;125:97-100.
3. Brogan TV, Nizet V, Waldhausen JHT, Rubens CE, Clarke WR. Group A Streptococcal necrotizing fasciitis complicating primary varicella: A series of fourteen patients. Pediatr Infect Dis Jour 1995; 14:588-594.
4. Riseman JA, Zamboni WA, Curtis A, Graham DR, Konrad HR, Ross DS. Hyperbaric oxygen therapy for necrotizing fasciitis reduces mortality and the need for debridements. Surgery 1990;108-847-850.
5. Hollabaugh RS, Dmochowski RR, Hickerson WL Cox CE. Fournier’s Gangrene: Therapeutic impact of hyperbaric oxygen. Plast Reconstruct Surg 1998;101:94-100.
https://healthpoint.co.nz/public/respiratory/slark-hyperbaric-unit-waitemata-te-whatu/