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M.Jeschke - Handbook of Burns Volume 1 Acute Burn Care - 2013.pdf
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Pain management after burn trauma

Cognitive behavioral therapy (e. g. distraction techniques, cognitive revaluation, positive visualization): Pain reduction could be verified [66]

Relaxation techniques (e. g. guided imagination with or without music): These techniques carried out before, during and after medical interventions could reduce postinterventional pain [67–70].

Hypnosis: The effectiveness of hypnosis in pain and analgesics consumption is verified by meta analysis [71]. Furthermore it could be proven that preoperative anxiety could be reduced [72]. However, the success of this technique depends greatly on the individual susceptibility of the patient. Compared to stress reducing strategies, hypnosis has shown to relieve anxiety better in burn patients with frequent dressing change [73].

Transcutaneous electrical nerve stimulation (TENS)

Electrical impulses are applied to the skin by electrodes. Generally, frequencies between 1Hz and 100Hz are used. The electrodes are placed in the vicinity of the painful areas. The stimulus itself does not cause any pain. Low-frequency stimulation (1Hz to 4Hz) releases autogenous endorphins. High-fre- quency stimulation (80Hz to 100Hz) stimulates the A -fibers thus inhibiting the pain transmission in the spinal cord. TENS can be applied in all posttraumatic phases, also during painful interventions. The analgesic consumption is reduced and the patient learns how to influence the pain actively instead of just have to bear it passively. A meta analysis of 21 randomized studies with 1350 patients showed a significantly positive influence to the postoperative analgesics consumption. The average frequency in the studies with optimal treatment was 85Hz [74].

Particularities of burn pain

Wound pain

For the treatment of wound pain, a multimodal approach with the cooperation of plastic surgeons, anesthetists, physical therapists, psychologists and nursing personnel is recommended.

In most cases an opioid therapy is inevitable. In the initial phase and in the presence of gastrointestin-

al motility and resorption disorders an intravenous dose of analgesics is often necessary to achieve a rapid pain control. In the intensive care unit this can be carried out as continuous intravenous infusion through a perfusor. Regarding a possible tolerance development an oral administration of long-term effective opioids is recommended after the initial phase. The administration of retard preparations according to a strict time schedule ensures an even activity of the medication. The dosage has to be adjusted until the patient feels no or only little pain (e. g. score > 4 according to the numeric analogous scale) at rest and in motion.

A combination of opioids and non-opioids has its benefits. Due to its few side effects paracetamol is the treatment of choice. NSAID are used only sparingly and in particular indications due to their effects on the renal and thrombocyte function.

The intravenous patient-controlled analgesia is a suitable treatment in burn patients with good compliance. However, its application can be limited in the presence of burn injuries on the hands.

In a multimodal treatment approach, the administration of other preparations (NMDA-receptor antagonists, anticonvulsants, antidepressants) should always be considered. In the acute phase of the treatment a general administration is not recommended to keep the pain management as simple as possible. With appropriate indication (e. g. burning or shooting pain) the therapy can be expanded gradually to be able to evaluate the effects and side effects of the additional analgesic.

Breakthrough pain

Burn pain requires a dynamic and flexible pain management. In case of suddenly intensifying pain there must always be a place for an “emergency medication”. These analgesics have to be effective in a very short time.

For this purpose the rapidly effective forms of opioid retard preparations are recommended. A very good option for the treatment of burn pain might be the oromucosal application of fentanyl (Actiq : Fentanyl as throat lozenge with integrated applicator for dissolution of the preparation in the oral cavity). Currently, Actiq is approved for the treatment of breakthrough pain during continuous opioid ther-

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