Lóu Yōngqiān 樓擁千 was a late-Qīng (Qián-lóng-era) paediatric physician active at Hángzhōu (Wǔlín 武林). He was a descendant of the famous Míng physician 樓英 (Lóu Yīng, 1320–1389/1400), author of the comprehensive medical encyclopedia Yīxué gāngmù 醫學綱目. The ancestral Yīxué gāngmù was Lóu Yōngqiān’s primary text in his youth, supplemented by extensive reading across the medical specialties.
He compiled the Yòukē jīngchù mén 幼科驚搐門 (KR3ej061) on paediatric convulsions (jīngchù 驚搐), published in 1791 (Qiánlóng 56) with a preface by Wáng Shàodiǎn 王紹典. The preface describes Lóu as a clinically generous practitioner who provided medical services and medicines free of charge to the poor and who, despite a frail constitution, drew up to 100 patients a day at his Hángzhōu practice. He was yáoyāo in temperament, prone to declining the carriage-arrival invitations of socially-prominent patients in favor of those who came on foot. The work Yòukē jīngchù mén was published at Hángzhōu in winter 1790 / spring 1791 after a long-deferred meeting between Lóu and Wáng Shàodiǎn.
CBDB has no entry for Lóu Yōngqiān; biographical detail is from the 1791 preface only.