Transparent hood may be a handy and a cost-effective device for reducing pain and simplifying cecal intubation, especially when using a standard adult colonoscope in routine colonoscopy.

Patients treated with strong opioid analgesics at fixed intervals for chronic cancer pain and with oral morphine at doses up to 20 mg as rescue medication were investigated. The doses of sublingual fentanyl to treat breakthrough pain were determined from rescue morphine doses by use of conversion ratios. In these patients, administration of sublingual fentanyl at doses determined by a conversion ratio of 1/50 was effective and safe. Further studies are needed to validate the use of this conversion method.

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