One embodiment is an improved method for providing a tube for attachment to a medical device such as a catheter that provides for intermittent changes in tube path length as a result of body movement thereby reducing the stress and pain caused by pulling on the device, as well as the optional provision to provide a very low, controlled tension that provides improved stability of the medical device without damage to the surrounding body tissues. This controlled tension can be applied or removed intermittently by a medical practitioner or the patient. The tubal devices shown in Fig and Fig both provide for extension in tubal path length while simultaneously providing for intermittent or continuous low tension pull on the catheter. Provision is also made for a continuous smooth fluid path with no moving internal parts.
