Flexible low compliance extension tubing for balloon inflation

Abstract

A controlled volume inflation-deflation device to inflate a balloon to occlude a blood vessel by dialing a knob that locks at rotational positions to locate a plunger at equally spaced locations within a syringe of the inflation-deflation device. The inflation-deflation device includes a releasable latch to lock the proximal and distal housings together to hold the plunger forward for occlusion, and to separate and hold the proximal and distal housings to retract the plunger for perfusion. When the inflation-deflation device is returned to the latched position, the balloon is re-inflated to its previous occlusive diameter. Also, an extension tube made of a lower modulus outer material co-extruded over and miscible with a higher modulus inner material may be used to produce a suitably low compliance extension tube for the inflation-deflation device. The balloon may have tapered ends and a cylindrical center portion so that it increases by more equal increments in outer diameter in response to incremental equal increases in inflation volume.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of co-pending U.S. application Ser. No. 13 / 776,568, filed on Feb. 13, 2013, issued as U.S. Pat. No. 9,179,919 on Nov. 10, 2015, which is a continuation of U.S. application Ser. No. 12 / 705,556, filed on Feb. 12, 2010, issued as U.S. Pat. No. 8,419,714 on Apr. 16, 2013, and which is a divisional of U.S. application Ser. No. 11 / 313,477, filed on Dec. 20, 2005, issued as U.S. Pat. No. 7,674,240 on Mar. 9, 2010.FIELD[0002]Temporary blood vessel occlusion devices and methods.BACKGROUND[0003]It is increasingly important that a physician or surgeon delivering substances, such as an imaging or treatment agent or drug, is able to safely, efficiently and accurately occlude a blood vessel at a region of interest to visualize or treat a desired target tissue for effective delivery of the substance. Moreover, it is also important that the physician or surgeon is able to efficiently and accurately remove the occlusion ...

AI Technical Summary

Benefits of technology

The present invention relates to an inflation-deflation device for inflating and deflating an occlusion device or balloon using increments of selected, controlled, or equal volumes of a fluid. A preferred embodiment of the device is a controlled volume inflation deflation device, such as an "INDEFLATOR®". The device can be used with compliant or elastic balloons and is especially useful when used with small catheters. The device allows for controlled inflation and deflation of the balloon, making the procedure safer and more effective. It can be connected to a conventional inflation-deflation device or a low volume syringe to control the diameter of the balloon.

Problems solved by technology

This is particularly true when the desired concentration and / or resident time of the substance required at the target site cannot be safely and / or effectively achieved by introduction of the substance to a location remote from the target site.

Moreover, the physician may only want to treat the diseased portion of an organ or tissue to avoid treating any healthy portion.

However, conventional means to determine a vessel's inner diameter (usually fluoroscopy) are not highly accurate, especially in eccentric vessels / vessels with atheroma.

If the device balloon size chosen is too small, then adequate vessel occlusion may not be obtained.

If the device balloon size chosen is too large, then the vessel wall may be unnecessarily damaged by over expansion in a manner that may result in a dissection and / or a subsequent vessel stenosis or restenosis.

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