Bone treatment systems and methods

• US 9,161,798 B2
• Filed: 03/19/2010
• Issued: 10/20/2015
• Est. Priority Date: 02/01/2008
• Status: Active Grant

• Current Assignee: Dfine Incorporated (Merit Medical Systems, Inc.)
• Original Assignee: Dfine Incorporated (Merit Medical Systems, Inc.)
• Inventors: Truckai, Csaba, Kohm, Andrew, Shadduck, John
• Primary Examiner(s): Lawson, Matthew
• Assistant Examiner(s): KU, SI MING
• Application Number:
  US12/728,127
• Publication Number:
  US 20100249793A1
• Time in Patent Office: 2,041 Days
• Field of Search: 606 92- 94, 606/86.R, 523/116, 700/299
• US Class Current: 1/1
• CPC Class Codes: A61B 17/8822 characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum
• CPC Class Codes: A61B 17/8836 for heating, cooling or curing of bone cement or fluid fillers
• CPC Class Codes: A61B 2017/00084 Temperature
• CPC Class Codes: A61B 90/98 using electromagnetic means, e.g. transponders

Abstract

Systems and methods for treating vertebral compression fractures are provided. A kit can include at least one body containing a bone cement precursor to be mixed with at least one other bone cement precursor to form a bone cement. The body or a package containing the body can include at least one sensor. In some embodiments the sensor can be a temperature sensor. In some methods, data from the sensor can be used to determine certain parameters related to a treatment interval involving the bone cement.

Claims

1. A method for providing operational information concerning a bone cement, comprising:

providing a bone cement kit comprising;

two packages having two different bone cement precursors, and at least one temperature sensor affixed to one of the packages of bone cement precursors,

wherein the one of the packages having the at least one temperature sensor affixed thereto contains a first bone cement precursor having a first pre-mix temperature that changes at a slower rate compared to a second pre-mix temperature of a second bone cement precursor, and

wherein the at least one temperature sensor comprises a temperature strip that provides visual indication of the sensed temperature;

mixing the bone cement precursors to provide a bone cement; and

determining a bone cement injection start time based on the first pre-mix temperature sensed by the at least one temperature sensor.

2. The method of claim 1, wherein the determining step is derived from a chart.

3. The method of claim 1, wherein the determining step is provided by an algorithm and computer controller.

4. The method of claim 1, wherein the temperature strip is configured to change color based on temperature.

5. The method of claim 1, wherein the temperature strip comprises thermochromic liquid crystals.

6. The method of claim 1, wherein the first bone cement precursor is a liquid component comprising monomer precursors and the second bone cement precursor is a powder component comprising a polymer.

7. The method of claim 6, wherein determining the bone cement injection start time comprises calculating a rate of change of post-mixing viscosity of the bone cement based on the first pre-mix temperature of the liquid component.

8. The method of claim 1, further comprising adjusting the pre-mix temperature to a mixing temperature corresponding to a temperature of one of the packages immediately prior to mixing.

9. The method of claim 8, wherein the mixing temperature corresponds to an ambient temperature of a location where the mixed bone cement is provided.

10. A method of determining a working condition of a curable bone cement, the method comprising:

determining a pre-mix temperature of at least one of first and second bone cement precursors, wherein one of the first and second bone cement precursors has a pre-mix temperature that changes at a slower rate compared to the other of the first and second bone cement precursors;

determining an ambient temperature;

mixing the first and second bone cement precursors to form a bone cement; and

determining a bone cement injection start time based at least in part on an algorithm relating to said pre-mix and ambient temperatures,

wherein the determining steps are accomplished at least by a temperature sensor affixed to containers or packaging of the one of the first and second bone cement precursors having the slower-changing pre-mix temperature, the temperature sensor comprising a temperature strip that provides visual indication of the sensed temperature.

11. The method of claim 10, further comprising actuating a controller and energy source to apply energy through an emitter to thereby apply heat to the bone cement post-mixing.

12. The method of claim 11, further comprising actuating the controller to modulate applied energy based on at least one of:

the pre-mix and ambient temperatures or the calculated injection start time.

13. The method of claim 11, further comprising actuating the controller to modulate hydraulic pressure based on the pre-mix and ambient temperatures or the calculated injection start time.

14. The method of claim 10, wherein determining the pre-mix temperature comprises determining a pre-mix temperature history of at least one of first and second bone cement precursors.

15. The method of claim 10, wherein the temperature strip is configured to change color based on temperature.

16. The method of claim 10, wherein the temperature strip comprises thermochromic liquid crystals.