our patients
Routine Patients
Once referred to the unit, each individual is formally assessed by one of the doctors who will decide upon an appropriate
treatment regime. The patients generally attend the unit for 20-30 treatments (one or two sessions per day depending upon
the severity of the condition), with each session lasting approximately ninety minutes.
Any condition precluding the patient from treatment will be detected during the initial assessment. During the course
of the therapy either a doctor or a tissue viability nurse monitors progress.
During hyperbaric oxygen therapy patients are comfortably enclosed in a hyperbaric chamber. A fully trained attendant
accompanies patients at all times. The chamber is slowly pressurized to 2.4 atmospheres absolute, which equals the pressure of
14 meters of seawater. Whilst under pressure the patient breathes 100 percent oxygen via a facemask or hood. This combination
of oxygen and pressure physically dissolves oxygen in the plasma. At 2.4 atmospheres pressure, the patient's arterial
oxygen partial pressure is approximately 1500mmHg (PaO2).
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The protocol of 20 sessions of HBO prior to surgery and 10 sessions afterwards (the 20/10 protocol) is the one most commonly
used for surgery in uncomplicated radiated tissues. A different, and more direct protocol is used in more serious situations
where frank soft tissue and/or osteoradionecrosis are present. Nevertheless, the 20/10 protocol has now been studied and
found effective with randomised prospective studies in at least three areas of head and neck post-radiation surgery;
bone graft reconstruction, soft tissue vascular flaps and tooth removal. Therefore, it is presently the definitive protocol
whenever any elective surgery or wounding is performed within radiated tissues.
Transcutaneous pulse oximetry is a simple, reliable, non-invasive diagnostic technique that provides an objective assessment
of local tissue perfusion and oxygenation. It can be used for serial assessment of the soft tissue envelope surrounding
problem wounds. Uses of transcutaneous pulse oximetry in the problem wound include the assessment of healing potential,
selection of amputation level, and patient selection for HBO therapy. Accurate prediction of wound healing potential is
essential to avoid the increased morbidity rates that accompany ischaemic breakdown of failed debridements and amputations.
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Emergency Patients
In addition to the routine work we also provide a 24 hour emergency on-call service for diving accidents, carbon monoxide
poisoning and life threatening infections from intensive care units.
On arrival at the unit all emergency patients are received into the two-bedded resuscitation room where advanced life
support can be continued. Once stabilised, the patient can be transferred directly into the hyperbaric chamber where
full therapy, including ventilatory support, inotropes, cardiac output monitoring and defibrillation can be continued, even
at depth. During the treatment the patient will be transferred to a ward in the main hospital or to the intensive care unit.
With the facilities we have available, we play an increasing role in the management of life threatening conditions in patients
who were previously considered too unstable to transfer and treat. For example necrotising fasciitis,thermal burns, and
severe blood loss anaemia.
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