Method and device for delivering medicine to bone

Abstract

A method for the long-term delivery of fluids to a bone of a patient includes providing a cannulated bone screw and an insert configured to be coupled to the bone screw. The method further includes creating an aperture in the skin of a patient, inserting the bone screw into a bone of the patient through the aperture, and coupling the insert to the bone screw. The method further includes the steps of providing a fluid source, coupling the fluid source to the insert, and delivering a fluid from the fluid source to the insert.

What is claimed is: 
     
         1 . A method for long-term delivery of fluids to a bone of a patient, comprising:
 providing a bone screw having a cannulation, and having one or more threads disposed on a proximal end of the bone screw;   providing an insert having one or more threads disposed on a proximal end of the insert configured to be coupled to the bone screw, wherein the one or more threads on the insert are configured to engage with the one or more threads on the bone screw;   inserting the bone screw into a bone of the patient through the aperture;   inserting a distal end of the insert through the cannulation in the bone screw and coupling the one or more threads on the proximal end of the insert to the one or more threads on the proximal end of the bone screw; and   delivering a fluid to the insert.   
     
     
         2 . The method of  claim 1 , wherein the threads on the proximal end of the insert are disposed on an outer surface of the insert and are engaged with the one or more threads disposed in the cannulation of the bone screw. 
     
     
         3 . The method of  claim 1 , further comprising heating the insert to heat the bone screw and an area of the bone proximate the bone screw. 
     
     
         4 . The method of  claim 3 , further comprising:
 removing the insert without removing the bone screw;   heating the insert while the insert is removed from the bone screw; and   reinserting the insert into the bone screw cannulation to heat an area proximate the insert.   
     
     
         5 . The method of  claim 1 , further comprising treating the insert with an antibiotic treatment prior to coupling the insert to the bone screw. 
     
     
         6 . The method of  claim 1 , further comprising closing an aperture in the skin over the insert, wherein the insert remains disposed beneath the skin. 
     
     
         7 . The method of  claim 1 , further comprising removing the insert from the bone screw. 
     
     
         8 . The method of  claim 7 , wherein the removing step is performed more than one week after commencing the delivering step. 
     
     
         9 . The method of  claim 7 , wherein the removing step is performed more than one month after commencing the delivering step. 
     
     
         10 . The method of  claim 7 , further comprising providing a second insert and coupling the second insert to the bone screw. 
     
     
         11 . The method of  claim 1 , wherein the fluid comprises one or more of an IV fluid, an antibiotic fluid, a parenteral nutrition fluid, a chemotherapy agent, or a bone cement.