Pio Manuel María Martínez Curbelo, Cuban surgeon and anesthesiologist (Nueva Paz, La Habana Province 05 June 1906 – 01 May 1962)

Proposed a modification of Kulenkampf brachial plexus block technique

Nueva tecnica de la anestesia del plexo braquial: ventajas de esta anestesia regional  em clinica ortopédica. Rev. Med. Cub. 5:27-31, 1933

Developed Continuous Peridural Segmental Anesthesia Technique (first presented in 1947)

Continuous peridural segmental anesthesia by means of an urethral catheter. Curr. Res. Anesth. Analg. 28:12-23, 1949 

Created a continuous rachidial anesthesia with thin needle catheter (1950) and proposed a thinner trocar