Sip-and-Puff
A breath-activated access method in which the user inhales (sips) or exhales (puffs) into a straw-like tube to generate switch inputs for controlling a powered wheelchair or communication device.
Full Definition
Sip-and-puff systems convert pneumatic pressure differences—generated by the user's breath—into electrical signals that drive device functions. Hard sip, soft sip, hard puff, and soft puff can be mapped to four distinct commands, enabling proportional-speed control when combined with appropriate electronics. In rehab technology editorial work, the hyphenated form 'sip-and-puff' is standard; 'sip and puff' (unhyphenated) and 'SNP' are variant forms seen in clinical notes. Editors should use the hyphenated form consistently in formal documents and flag acronym 'SNP' for expansion on first use. The control method is common in very high cervical spinal cord injury (C1–C3) populations.
Usage
Usage note: Always hyphenate as a compound modifier: 'sip-and-puff control.' Expand the informal acronym 'SNP' on first use in formal documents.
In Context
- "The client, a C2 tetraplegic, independently navigated the clinical corridor using a sip-and-puff drive interface." — Rehabilitation programme progress note
- "All references to 'sip and puff' in the manuscript were changed to the hyphenated form 'sip-and-puff' per house style." — Journal copyediting note