A neutral pressure split-septum luer access device is described for receiving a luer lock connector with a surrounding shroud. The housing has a distal portion with a transversely enlarged chamber defining an internal chamber wall. A septum with a central slit for receiving a male luer into the slit is mounted in the housing. The septum has an upper portion with an outer face, a lower sealing portion in sealing contact with the distal portion of the housing, and a plurality of elastomeric columns projecting laterally within the chamber, each elastomeric columns defines a longitudinal axis and is under sufficient compression along the longitudinal axis induced by the internal wall of the chamber so that the columns are bowed and the strength along each of the elastomeric columns is reduced by bowing, but the slit sealing force is high. This configuration places the lower portion of the slit in a tightly sealed configuration with is never-the-less receptive to penetration by the male luer which causes the columns to bow further and collapse precipitously with the elastomeric force of the collapsing mass of the columns being carried distally to displace and reliably pop open the central slit distal the tip of the male luer. The septum further provides a transverse separation between the columns and the distal sealing portion so the force of the displacement force to the sealing portion is reduced.Linvention concerne un dispositif daccès de type Luer à septum fendu sous pression interstitielle permettant de recevoir un embout à vis Luer muni dune gaine environnante. Le logement a une partie distale ayant une chambre agrandie dans le sens transversal définissant une paroi de chambre interne. Un septum à fente centrale permettant de recevoir un connecteur Luer mâle dans la fente est monté dans le logement. Le septum a une partie supérieure avec une face extérieure, une partie détanchéité inférieure en contact détanchéité avec la partie distale du logement, et une pluralit
