Straight cutting tip for a straight bore subcutaneous implantation instrument

• US 8,394,050 B2
• Filed: 08/23/2010
• Issued: 03/12/2013
• 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:
  US12/861,762
• Publication Number:
  US 20100318022A1
• Time in Patent Office: 932 Days
• Field of Search: 604 57- 64, 604/117, 604/272, 604/274
• US Class Current: 604/60
• 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

A straight cutting tip for a straight bore subcutaneous implantation instrument is provided. An incising shaft body defines an axial bore extending continuously throughout the incising shaft body'"'"'s length. The axial bore is open on both distal and proximal ends of the incising shaft body and has a non-circular cross section of at least five millimeters. A beveled surface is transversely formed beginning on a top surface and ending on a bottom surface of the distal end of the incising shaft body. A straight and sharpened cutting edge with rounded ends on each side curves inwardly towards the proximal end of the incising shaft body. The cutting edge is defined only along a bottom distal edge of the beveled surface. An attachment point is formed on the proximal end of the incising shaft body.

Claims

1. A subcutaneous implantation instrument, comprising:

an incising shaft body that defines an axial bore extending continuously throughout the incising shaft body'"'"'s length, wherein the axial bore is open on both distal and proximal ends of the incising shaft body and has a non-circular cross section of at least five millimeters;

a flat planar beveled surface transversely formed beginning on a top surface and ending on a bottom surface of the distal end of the incising shaft body;

a straight, flat, and sharpened cutting edge defined only along a bottom distal edge of the flat planar beveled surface and comprising rounded ends on each side of the cutting edge that curve inwardly towards the proximal end of the incising shaft body; and

an attachment point formed on the proximal end of the incising shaft body configured to attach the incising shaft body to a straight bore subcutaneous implantation instrument.

2. A subcutaneous implantation instrument according to claim 1, further comprising:

a syringe body that defines an axial bore extending continuously throughout the syringe body'"'"'s length, wherein the axial bore is open on both distal and proximal ends of the syringe body and has a non-circular cross section approximately equal to the incising shaft body'"'"'s axial bore, wherein the distal end of the syringe body is attached to the incising shaft body at the attachment point.

3. A subcutaneous implantation instrument according to claim 2, further comprising:

a plunger assembly comprising handle and a plunger connected by a plunger shaft with a combined length exceeding the lengths of the bores of the incising shaft body and the syringe body, wherein the plunger and plunger shaft are shaped to follow the cross sectional contour of the incising shaft body and the syringe body.

4. A subcutaneous implantation instrument according to claim 2, further comprising:

a clearing trocar comprising a handle and a sharp cutting tip connected by a trocar shaft with a combined length exceeding the lengths of the bores of the incising shaft body and the syringe body, wherein the sharp cutting tip and trocar shaft are shaped to follow the cross sectional contour of the incising shaft body and the syringe body.

5. A subcutaneous implantation instrument according to claim 4, the sharp cutting tip of the clearing trocar further comprising:

a beveled surface transversely formed beginning on a top surface and ending on a bottom surface of the distal end of the trocar shaft;

a straight and sharpened cutting edge with rounded ends on each side that curve inwardly towards the proximal end of the trocar shaft, wherein the cutting edge is defined only along a bottom distal edge of the beveled surface of the trocar shaft.

6. A subcutaneous implantation instrument with penetration limiting mechanism, comprising:

an incising shaft body that defines an axial bore extending continuously throughout the incising shaft body'"'"'s length, wherein the axial bore is open on both distal and proximal ends of the incising shaft body and has a non-circular cross section of at least five millimeters;

a stopping flange mounted on a bottom surface of the incising shaft body at an angle of between approximately 30° and

60°

bent in a proximal direction;

a flat planar beveled surface transversely formed beginning on a top surface and ending on a bottom surface of the distal end of the incising shaft body;

a straight, flat, and sharpened cutting edge defined only along a bottom distal edge of the flat planar beveled surface and comprising rounded ends on each side of the cutting edge that curve inwardly towards the proximal end of the incising shaft body; and

an attachment point formed on the proximal end of the incising shaft body configured to attach the incising shaft body to a straight bore subcutaneous implantation instrument.

7. A subcutaneous implantation instrument with penetration limiting mechanism according to claim 6, the stopping flange further comprising:

a frictional collar affixed to the stopping flange and slidably and circumferentially mounted along an exterior surface of the syringe body; and

an adjustable collar stay limiting movement of the frictional collar.

8. A subcutaneous implantation instrument, comprising:

an incising shaft body that defines an axial bore extending continuously throughout the incising shaft body'"'"'s length, wherein the axial bore is open on both distal and proximal ends of the incising shaft body and has a cross section in the shape of a simple closed polygon with a height of at least five millimeters;

a flat planar beveled surface transversely formed beginning on a top surface and ending on a bottom surface of the distal end of the incising shaft body;

a straight, flat, and sharpened cutting edge defined only along a bottom distal edge of the flat planar beveled surface and comprising rounded ends on each side of the cutting edge that curve inwardly towards the proximal end of the incising shaft body; and

an attachment point formed on the proximal end of the incising shaft body configured to attach the incising shaft body to a polygonal straight bore subcutaneous implantation instrument.

9. A subcutaneous implantation instrument according to claim 8, further comprising:

a syringe body that defines an axial bore extending continuously throughout the syringe body'"'"'s length, wherein the axial bore is open on both distal and proximal ends of the syringe body and has a non-circular cross section approximately equal to the incising shaft body'"'"'s axial bore, wherein the distal end of the syringe body is attached to the incising shaft body at the attachment point; and

a structure formed on a proximal end of the syringe body and defining a surface extending outward from the syringe body conformably shaped to engage a user'"'"'s fingers.

10. A subcutaneous implantation instrument according to claim 8, wherein the simple closed polygon comprises one of a rectangular, square, pentagonal, hexagonal, heptagonal, and octagonal shape.

11. A subcutaneous implantation instrument, comprising:

an incising shaft body formed into a curved arc that defines a curved axial bore extending continuously throughout the incising shaft body'"'"'s length, wherein the axial bore is open on both distal and proximal ends of the incising shaft body and has a non-circular cross section of at least five millimeters;

a flat planar beveled surface transversely formed beginning on a top surface and ending on a bottom surface of the distal end of the incising shaft body;

a straight, flat, and sharpened cutting edge defined only along a bottom distal edge of the flat planar beveled surface and comprising rounded ends on each side of the cutting edge that curve inwardly towards the proximal end of the incising shaft body; and

an attachment point formed on the proximal end of the incising shaft body configured to attach the incising shaft body to a curved bore subcutaneous implantation instrument.

12. A subcutaneous implantation instrument according to claim 11, further comprising:

a syringe body formed into a curved arc that defines a curved axial bore extending continuously throughout the syringe body'"'"'s length, wherein the axial bore is open on both distal and proximal ends of the syringe body and has a non-circular cross section approximately equal to the incising shaft body'"'"'s axial bore, wherein the distal end of the syringe body is attached to the incising shaft body at the attachment point.

13. A subcutaneous implantation instrument according to claim 12, further comprising:

a plunger assembly comprising handle and a plunger connected by a plunger shaft with a combined length exceeding the lengths of the bores of the incising shaft body and the syringe body, wherein the plunger and plunger shaft are shaped to follow the cross sectional contour of the incising shaft body and the syringe body.

14. A subcutaneous implantation instrument according to claim 12, further comprising:

a clearing trocar comprising a handle and a sharp cutting tip connected by a trocar shaft with a combined length exceeding the lengths of the bores of the incising shaft body and the syringe body, wherein the sharp cutting tip and trocar shaft are shaped to follow the cross sectional contour of the incising shaft body and the syringe body.

15. A subcutaneous implantation instrument according to claim 14, the sharp cutting tip of the clearing trocar further comprising:

a beveled surface transversely formed beginning on a top surface and ending on a bottom surface of the distal end of the trocar shaft;

a straight and sharpened cutting edge with rounded ends on each side that curve inwardly towards the proximal end of the trocar shaft, wherein the cutting edge is defined only along a bottom distal edge of the beveled surface of the trocar shaft.

16. A subcutaneous implantation instrument with penetration limiting mechanism, comprising:

an incising shaft body formed into a curved arc that defines a curved axial bore extending continuously throughout the incising shaft body'"'"'s length, wherein the axial bore is open on both distal and proximal ends of the incising shaft body and has a non-circular cross section of at least five millimeters;

a stopping flange mounted on a bottom surface of the incising shaft body at an angle of between approximately 30° and

60°

bent in a proximal direction;

a flat planar beveled surface transversely formed beginning on a top surface and ending on a bottom surface of the distal end of the incising shaft body;

a straight, flat, and sharpened cutting edge defined only along a bottom distal edge of the flat planar beveled surface and comprising rounded ends on each side of the cutting edge that curve inwardly towards the proximal end of the incising shaft body; and

an attachment point formed on the proximal end of the incising shaft body configured to attach the incising shaft body to a curved bore subcutaneous implantation instrument.

17. A subcutaneous implantation instrument with penetration limiting mechanism according to claim 16, the stopping flange further comprising:

a frictional collar affixed to the stopping flange and slidably and circumferentially mounted along an exterior surface of the syringe body; and

an adjustable collar stay limiting movement of the frictional collar.

18. A subcutaneous implantation instrument, comprising:

an incising shaft body formed into a curved arc that defines a curved axial bore extending continuously throughout the incising shaft body'"'"'s length, wherein the axial bore is open on both distal and proximal ends of the incising shaft body and has a cross section in the shape of a simple closed polygon with a height of at least five millimeters;

a flat planar beveled surface transversely formed beginning on a top surface and ending on a bottom surface of the distal end of the incising shaft body;

a straight, flat, and sharpened cutting edge defined only along a bottom distal edge of the flat planar beveled surface and comprising rounded ends on each side of the cutting edge that curve inwardly towards the proximal end of the incising shaft body; and

an attachment point formed on the proximal end of the incising shaft body configured to attach the incising shaft body to a polygonal curved bore subcutaneous implantation instrument.

19. A subcutaneous implantation instrument according to claim 18, further comprising:

a syringe body formed into a curved arc that defines a curved axial bore extending continuously throughout the syringe body'"'"'s length, wherein the axial bore is open on both distal and proximal ends of the syringe body and has a non-circular cross section approximately equal to the incising shaft body'"'"'s axial bore, wherein the distal end of the syringe body is attached to the incising shaft body at the attachment point; and

a structure formed on a proximal end of the syringe body and defining a surface extending outward from the syringe body conformably shaped to engage a user'"'"'s fingers.

20. A subcutaneous implantation instrument according to claim 18, wherein the simple closed polygon comprises one of a rectangular, square, pentagonal, hexagonal, heptagonal, and octagonal shape.