noun
atraumatic needle
Medical term for a needle designed to minimize tissue damage, often used in suturing or injections.
外科医は無外傷性針を使って縫合した。
The surgeon sutured using an atraumatic needle.
Compound of 無 (mu, 'without'), 外傷 (gaishō, 'external injury'), 性 (sei, 'nature'), and 針 (hari/shin, 'needle'). The reading はり is more common for standalone 針, while しん appears in some compound contexts.