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Pain management in photodynamic therapy using a nitrous oxide/oxygen mixture: a prospective, within-patient,
1Department of Dermatology, University of Heidelberg, Heidelberg, Germany.
Background:
Photodynamic therapy is an effective treatment for actinic keratoses. Nevertheless, severe pain during the procedure is a serious adverse effect, which leads to interruption or even termination. Complete pain relief remains a difficult challenge.
Objective:
To evaluate the effect of a nitrous oxide/oxygen mixture on pain intensity during photodynamic therapy.
Methods:
This clinical trial has been designed as a prospective, single-centre, explorative, controlled, observational study.
Results:
We were able to detect a significant overall pain reduction of 55.2% after application of a nitrous oxide/oxygen mixture by means of an intra-individual comparison. Furthermore, the total number of therapy interruption significantly decreased by 82% after the inhalation analgesia. Additionally, treatment satisfaction ranged from 'extremely to very satisfied'.
Conclusions:
This study shows that analgesia by means of a nitrous oxide/oxygen mixture is a very effective and well-tolerated method for achieving significant pain reduction during photodynamic therapy.
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