Subglottic Stenosis in Pregnancy

Apparatus and methods are provided for performing a medical procedure using an introducer sheath and a plurality of valve hubs. The introducer sheath includes a lumen extending between proximal and distal portions and a hub on the proximal portion. Each valve hub includes a valve body including a plurality of ports. The valve hubs may include different numbers and/or configurations of ports to facilitate introducing multiple instruments simultaneously through the tubular member. Optionally, the kit may also include one or more dilators. Each valve hub and the dilator may include connectors for mating with connectors on the tubular member hub releasably coupling a selected valve hub or the dilator to the tubular member.