Extractable filler for inserting medicine into vertebral body

Abstract

An extractable device is used to insert a medicinal filling into a vertebral body. The device comprises a filling member and a pasty medicine. The filling member is made of a flexible and permeable wall and is provided with a holding portion and an injection port via which the pasty medicine is injected into the holding portion after the filling member is inserted into the vertebral body. The holding portion is provided with an opening which is releasably lashed by one end of one or more threads so as to make the opening leakproof. Upon completion of solidification of the pasty medicine in the holding portion of the filling member, other end of the thread is pulled to unlash the opening of the holding portion, thereby enabling the filling member to be extracted from the vertebral body so as to leave only the medicine in the vertebral body.

1 . An extractable device for inserting a solidifiable medicinal filling into an animal tissue, comprising:
 a flexible container having a proximal injection port for injection of the filling into the container, and a releasably closable distal opening for delivery of the filling into the animal tissue outside of the container; and   at least one releasable thread that releasably closes the distal opening to contain the filling within the container prior to solidification, and that reopens the distal opening to enable the delivery of the filling into the animal tissue outside of the container after solidification;   in which the container is inflatable and, after being inflated, is substantially tubular with cross sectional areas that increase from the injection port to the distal opening.   
     
     
         2 . The device of  claim 1 , in which the flexible container is permeable. 
     
     
         3 . The device of  claim 1 , in which the flexible container is hermetic. 
     
     
         4 . The device of  claim 1 , in which the thread is releasable upon application of an external pulling force. 
     
     
         5 . The device of  claim 1 , in which the thread is releasable upon application of an external pushing force. 
     
     
         6 . The device of  claim 1 , in which the container comprises a single-layered wall. 
     
     
         7 . The device of  claim 1 , in which the container comprises a multi-layered wall. 
     
     
         8 . The device of  claim 1 , in which the container comprises inner and outer layers. 
     
     
         9 . The device of  claim 1 , further comprising means for injecting the solidifiable medicinal filling into the device through the injection port. 
     
     
         10 . The device of  claim 1 , in which the permeable container is formed of a plurality of threads. 
     
     
         11 . The device of  claim 1 , in which the permeable container is formed of a plurality of threads by weaving. 
     
     
         12 . In combination, the device of  claim 1  and an injection tool for injecting the solidifiable medicinal filling into the device through the injection port. 
     
     
         13 . The combination of  claim 12 , in which the injection tool comprises a guide tube connected to the injection port. 
     
     
         14 . The device of  claim 1 , in which the container comprises a folded double-layer tubular wall having a proximal inner layer end and a distal folded double-layer end, in which the delivery of the filling follows pulling a free end of an outer layer of the double-layer tubular wall to retreat the folded double-layer end, after the opening end of the holding portion has been reopened. 
     
     
         15 . The device of  claim 14 , in which at least one releasable thread is between an inner layer and the outer layer of the double-layer tubular wall. 
     
     
         16 . The device of  claim 14 , in which the inner layer and the outer layer of the double-layer tubular wall are provided with a plurality of through holes and are permeable. 
     
     
         17 . A method for implanting a solidified medicine into an animal tissue, comprising:
 inserting into the animal tissue a flexible container having a distal opening that is releasably closable;   at least partially filling the container with a solidifiable medicinal filling;   solidifying the medicinal filling within the container;   reopening the distal opening of the container; and   depositing the filling into the animal tissue through the distal opening by extracting the container from the animal tissue;   in which the container is inflatable and, after being inflated, is substantially tubular with cross sectional areas that increase from the injection port to the distal opening.   
     
     
         18 . The method of  claim 17 , further comprising injecting the filling into the container through an injection port on a proximal end of the container. 
     
     
         19 . An extractable device for placing a solidifiable medicinal filling into an animal tissue, comprising:
 a flexible container, comprising a proximal inlet for receipt of the filling and a releasably closable distal outlet for subsequent delivery of solidified filling into the animal tissue;   at least one releasable thread to reduce leakage of the filling from the container;   in which the container is inflatable and, after being inflated, is substantially tubular with cross sectional areas that increase from the injection port to the distal opening.   
     
     
         20 . A method for placing a solidified medicine into an animal tissue, comprising:
 inserting into the animal tissue a flexible container having a proximal inlet and a distal, releasably leakproof outlet,   providing the container with a solidifiable medicinal filling through the proximal inlet;   solidifying the filling within the container;   reopening the distal outlet;   delivering the solidified filling into the animal tissue through the distal outlet opening; and   removing the container from the animal tissue;   in which the container is inflatable and, after being inflated, is substantially tubular with cross sectional areas that increase from the injection port to the distal opening.