Instrument with a two-part plunger for subcutaneous implantation

• US 8,323,232 B2
• Filed: 07/14/2010
• Issued: 12/04/2012
• Est. Priority Date: 08/24/2000
• Status: Expired due to Fees

• Current Assignee: Cardiac Science Operating Company (Cardica Incorporated)
• Original Assignee: Cardiac Science Operating Company (Cardica Incorporated)
• Inventors: Bardy, Gust H.
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): Price, Nathan R
• Application Number:
  US12/836,472
• Publication Number:
  US 20100324578A1
• Time in Patent Office: 874 Days
• Field of Search: 604 57- 64, 604/117, 604/158, 604/164.01, 604/164.04, 604/164.06, 604/164.08, 604/274, 600/432, 600/567
• US Class Current: 604/57
• CPC Class Codes: A61B 2560/063 Devices specially adapted for delivering implantable medical measuring apparatus
• CPC Class Codes: A61M 37/0069 Devices for implanting pellets, e.g. markers or solid medicaments for introducing of radioactive sources for interstitial radiation therapy, i.e. brachytherapy A61N5/1027

Abstract

An instrument with a two-part plunger for subcutaneous implantation is provided. An incising body defines a non-circular coaxial bore and includes a cutting edge formed on a distal end. A two-part plunger is non-fixedly contained within the coaxial bore and includes a tongue blade assembly and a plunger assembly. The tongue blade assembly is provided on a bottom surface of the coaxial bore and includes a tongue blade shaft and a thin tongue blade with a sharpened clearing edge on a distal end. The tongue blade assembly has a length exceeding the coaxial bore. The plunger assembly has a length exceeding the coaxial bore and includes a plunger shaft and a plunger affixed on a distal end. The plunger is slidably positioned on a top surface of the tongue blade.

Claims

1. An instrument for use in subcutaneous implantation, comprising:

an incising body comprising a syringe body fixedly attached to an incising shaft and open on both distal and proximal ends, a non-circular bore being defined along a common longitudinal axis of the syringe body and the incising shaft, the bore sized to enclose an implant, the incising shaft comprising a sharpened edge formed on the incising shaft'"'"'s bottom distal end; and

a tongue blade comprising;

a horizontal flat surface with a distal end sharpened into a bevel, the horizontal flat surface having a length exceeding a length of the incising body; and

a tongue blade handle perpendicularly affixed to a proximal end of the horizontal flat surface; and

a plunger comprising;

a horizontal flat surface and a blunt tip on a distal end of the flat surface sized to fit within a width of the bore, the horizontal flat surface having a length exceeding the length of the incising body, the horizontal flat surface of the tongue blade shaft and the blunt tip of the plunger shaft having a combined height sized to fit a height of the bore; and

a plunger handle perpendicularly affixed to a proximal end of the horizontal flat surface of the plunger.

2. An instrument according to claim 1, further comprising:

one or more corresponding guide tracks formed on at least two of the tongue blade, plunger, and incising body.

3. An instrument according to claim 1, further comprising:

at least two support shelves affixed to an inner surface of the bore, wherein the tongue blade is located above the support shelves and the plunger is located below the support shelves.

4. An instrument according to claim 1, further comprising:

a safety stop affixed on a top surface of the incising body on a distal end.

5. An instrument according to claim 1, wherein the sharpened edge comprises one of a flat blade, a right triangle blade, an arrowhead blade, a triangle blade, and a convex triangle blade.

6. An instrument according to claim 1, wherein a periphery along a bottom edge of the tongue blade is sharpened.

7. An instrument for use in subcutaneous implantation, comprising:

an incising body comprising a syringe body fixedly attached to an incising shaft and open on both distal and proximal ends, a non-circular bore being defined along a common longitudinal axis of the syringe body and the incising shaft, the bore sized to enclose an implant, the incising shaft comprising a sharpened edge formed on the incising shaft'"'"'s bottom distal end; and

a tongue blade comprising;

a horizontal flat surface with a distal end sharpened into a bevel;

a tongue blade shaft affixed to a proximal end of the horizontal flat surface, the tongue blade shaft and the horizontal surface having a combined length exceeding a length of the incising body; and

a tongue blade handle perpendicularly affixed to a proximal end of the tongue blade shaft; and

a plunger comprising;

a horizontal flat surface and a blunt tip on a distal end of the flat surface sized to fit within a width of the bore;

a plunger shaft affixed to a proximal end of the horizontal flat surface, the plunger shaft and the horizontal flat surface having a length combined exceeding the length of the incising body, the horizontal flat surface of the tongue blade shaft and the blunt tip of the plunger shaft having a combined height sized to fit a height of the bore, the tongue blade and the plunger shafts having a combined width sized to fit a width of the bore; and

a plunger handle perpendicularly affixed to a proximal end of the horizontal flat surface of the plunger.

8. An instrument according to claim 7,

wherein the sharpened edge comprises one of a flat blade, a right triangle blade, an arrowhead blade, a triangle blade, and a convex triangle blade.

9. An instrument according to claim 7, further comprising:

one or more corresponding guide tracks formed on at least two of the tongue blade, plunger, and incising body.

10. An instrument according to claim 7, further comprising:

a safety stop affixed on a top surface of the incising body on a distal end.

11. An instrument for use in subcutaneous implantation, comprising:

an incising body, comprising;

an incising shaft defining a cavity along a longitudinal axis of the incising shaft and open on a distal end and partially open on a proximal end, the incising shaft comprising a distal end having a beveled surface transversely formed beginning on a top surface and ending on a bottom surface that has a sharpened bottom edge, the cavity sized to enclose an implant; and

a syringe body defining a bore that is shorter than the incising shaft in length and narrower than both the cavity and the incising shaft in width and height along a longitudinal axis of the syringe body and open on both distal and proximal ends, a distal end of the syringe body being affixed to a proximal end of the incising shaft with the bore aligned with the partially open proximal end of the cavity;

a tongue blade comprising;

a horizontal flat surface with a distal end sharpened into a bevel and sized to fit a width of the cavity, the horizontal flat surface having a length exceeding a length of the syringe body; and

a tongue blade handle perpendicularly affixed to a proximal end of the horizontal flat surface; and

a plunger comprising;

a horizontal flat surface and a blunt tip on a distal end of the flat surface sized to fit within a width of the bore, the horizontal flat surface having a length exceeding the length of the incising body, the horizontal flat surface of the tongue blade shaft and the blunt tip of the plunger shaft having a combined height sized to fit a height of the bore; and

a plunger handle perpendicularly affixed to a proximal end of the horizontal flat surface of the plunger.

12. An instrument according to claim 11,

wherein the sharpened bottom edge comprises one of a flat blade, a right triangle blade, an arrowhead blade, a triangle blade, and a convex triangle blade.

13. An instrument according to claim 11, further comprising:

one or more corresponding guide tracks formed on at least two of the tongue blade, plunger, and incising body.

14. An instrument according to claim 11, further comprising:

a safety stop affixed on a top surface of the incising body on a distal end.

15. An instrument for use in subcutaneous implantation, comprising:

an incising body, comprising;

an incising shaft defining a cavity along a longitudinal axis of the incising shaft and open on a distal end and partially open on a proximal end, the incising shaft comprising a distal end having a beveled surface transversely formed beginning on a top surface and ending on a bottom surface that has a sharpened bottom edge, the cavity sized to enclose an implant; and

a syringe body defining a bore that is shorter than the incising shaft in length and narrower than both the cavity and the incising shaft in width and height along a longitudinal axis of the syringe body and open on both distal and proximal ends, a distal end of the syringe body being affixed to a proximal end of the incising shaft with the bore aligned with the partially open proximal end of the cavity; and

a tongue blade comprising;

a horizontal flat surface with a distal end sharpened into a bevel and sized to fit a width of the cavity;

a tongue blade shaft affixed to a proximal end of the horizontal flat surface, the tongue blade shaft and the horizontal surface having a combined length exceeding a length of the syringe body; and

a tongue blade handle perpendicularly affixed to a proximal end of the tongue blade shaft; and

a plunger comprising;

a horizontal flat surface and a blunt tip on a distal end of the flat surface sized to fit within a width of the bore;

a plunger shaft affixed to a proximal end of the horizontal flat surface, the plunger shaft and the horizontal flat surface having a combined length exceeding the length of the incising body, the horizontal flat surface of the tongue blade shaft and the blunt tip of the plunger shaft having a combined height sized to fit a height of the bore, the tongue blade and the plunger shafts having a combined width sized to fit a width of the bore; and

a plunger handle perpendicularly affixed to a proximal end of the horizontal flat surface of the plunger.

16. An instrument according to claim 15,

wherein the sharpened bottom edge comprises one of a flat blade, a right triangle blade, an arrowhead blade, a triangle blade, and a convex triangle blade.

17. An instrument according to claim 15, further comprising:

a safety stop affixed on a top surface of the incising body on a distal end.