distender
/dɪsˈtendər/Definitions
1. noun
A device for stretching the skin of a patient, especially to reduce swelling or to relieve pain
“The doctor used a distender to help reduce the swelling in her patient’s injured knee.”
2. verb
To stretch or extend something, such as the skin of a patient, to its full or normal size
“The nurse had to distend the patient’s skin to administer the injection properly.”