Puncture device and medical fluid administration device

• US 10,183,125 B2
• Filed: 03/27/2015
• Issued: 01/22/2019
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha
• Original Assignee: Terumo Kabushiki Kaisha
• Inventors: Uchiyama, Joji
• Primary Examiner(s): Sirmons, Kevin C
• Assistant Examiner(s): Swanson, Leah
• Application Number:
  US14/671,339
• Publication Number:
  US 20150196719A1
• Time in Patent Office: 1,397 Days
• Field of Search: 604151
• CPC Class Codes: A61B 5/07 Endoradiosondes
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2005/1583 Needle extractors
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 2005/3289 with rotation of the needle, e.g. to ease penetration
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/3287 Accessories for bringing the needle into the body; Automatic needle insertion A61M5/20, A61M5/31525 take precedence

Abstract

A puncture device includes a housing unit including an attachment surface configured to be attached to a body surface of a user; a puncture needle including an outer needle and an inner catheter located in the outer needle, the puncture needle being configured to be projected from the attachment surface to be punctured into a body of the user; a puncture mechanism configured to project the puncture needle from the attachment surface to be punctured into the body of the user, and pull back only the outer needle of the puncture needle into the housing unit with the inner catheter of the puncture needle indwelled in the body; and a puncture angle adjustment mechanism configured to adjust a puncture angle of the puncture needle, which is an angle of the puncture needle with respect to the attachment surface.

Claims

1. A puncture device comprising:

a housing unit including an attachment surface configured to be attached to a body surface of a user, the housing unit defining a space therein;

a puncture needle including an outer needle and an inner catheter, wherein at least a portion of the inner catheter is located in the outer needle, and wherein the puncture needle is configured to be moved from a first location at which an entirety of the puncture needle is located in the space in the housing unit to a second location at which the puncture needle projects from the attachment surface to be punctured into a body of the user;

a puncture mechanism comprising;

a base configured to act as a guide when sliding the outer needle,

a push-in part configured to be pushed with respect to the housing unit,

a center part that is arranged with the outer needle and that slides along the base, and

a coupling part that couples the center part and the push-in part,

wherein the puncture mechanism is configured to cause the puncture needle, in which a distal end portion of the inner catheter is inserted in the outer needle, to project out from the attachment surface by sliding the outer needle along the base, and to pull back only the outer needle of the puncture needle into the housing unit with the inner catheter of the puncture needle indwelled in the body, and

wherein, when the push-in part is pushed in with respect to the housing unit, a force with which the push-in part is pushed in is transmitted to the center part and slides the center part via the coupling part to project the puncture needle from the attachment surface; and

a puncture angle adjustment mechanism configured to adjust a puncture angle of the puncture needle, which is an angle of the puncture needle with respect to the attachment surface, the puncture angle adjustment mechanism comprising;

a fixed part that is fixed to the housing unit and that supports the base in a freely tiltable manner, and

a dial that is accessible from a location outside the housing unit so as to be rotatably operable by a user such that, when the dial is rotated by the user, the rotation of the dial with respect to the fixed part changes a tilt of the base with respect to the fixed part, and the puncture angle is thereby adjusted,

wherein the center part is held on one end side of the base at an initial position before sliding, the initial position being moved as the base is tilted when changing the puncture angle,

wherein the coupling part includes a hole in which a part of the center part is fitted, the coupling part being coupled with the center part by said part of the center part being fitted in the hole, and

wherein the hole of the coupling part is formed along a movement path of the initial position of the center part, and the puncture mechanism is configured such that the coupling of the push-in part and the center part by the coupling part being maintained constantly as the initial position of the center part is moved and a part of the center part is moved along the hole.

2. The puncture device according to claim 1,

wherein the coupling part is attached in a freely rotating manner with respect to the fixed part, and

wherein the coupling part is configured to slide the center part along the base while a part of the center part moves along the hole by rotating with the pushing in of the push-in part.

3. The puncture device according to claim 1,

wherein the housing unit has a top surface, a bottom surface, and a side surface extending from the top surface to the bottom surface;

and

wherein the dial is rotatably operable by the user via an opening in the top surface of the housing unit.

4. The puncture device according to claim 1,

wherein, when the rotation of the dial with respect to the fixed part changes a tilt of the base with respect to the fixed part, the tilt of the base is changed with respect to the push in part.

5. A medical fluid administration device comprising:

a housing unit including an attachment surface configured to be attached to a body surface of a user, the housing unit defining a space therein;

a puncture needle including an outer needle and an inner catheter, wherein at least a portion of the inner catheter is located in the outer needle, and wherein the puncture needle is configured to be moved from a first location at which an entirety of the puncture needle is located in the space in the housing unit to a second location at which the puncture needle projects from the attachment surface to be punctured into a body of the user;

a puncture mechanism comprising;

a base configured to act as a guide when sliding the outer needle,

a push-in part configured to be pushed with respect to the housing unit,

a center part that is arranged with the outer needle and that slides along the base, and

a coupling part that couples the center part and the push-in part,

wherein the puncture mechanism is configured to cause the puncture needle, in which a distal end portion of the inner catheter is inserted in the outer needle, to project out from the attachment surface by sliding the outer needle along the base, and to pull back only the outer needle of the puncture needle into the housing unit with the inner catheter of the puncture needle indwelled in the body, and

wherein, when the push-in part is pushed in with respect to the housing unit, a force with which the push-in part is pushed in is transmitted to the center part and slides the center part via the coupling part to project the puncture needle from the attachment surface;

a medical fluid storage unit configured to store a medical fluid;

a feeding unit configured to feed the medical fluid stored in the medical fluid storage unit into the body through the puncture needle; and

a puncture angle adjustment mechanism configured to adjust a puncture angle of the puncture needle, which is an angle of the puncture needle with respect to the attachment surface, the puncture angle adjustment mechanism comprising;

a fixed part that is fixed to the housing unit and that supports the base in a freely tiltable manner, and

a dial that is accessible from a location outside the housing unit so as to be rotatably operable by a user such that, when the dial is rotated by the user, the rotation of the dial with respect to the fixed part changes a tilt of the base with respect to the fixed part, and the puncture angle is thereby adjusted,

wherein the center part is held on one end side of the base at an initial position before sliding, the initial position being moved as the base is tilted when changing the puncture angle,

wherein the coupling part includes a hole in which a part of the center part is fitted, the coupling part being coupled with the center part by said part of the center part being fitted in the hole, and

wherein the hole of the coupling part is formed along a movement path of the initial position of the center part, and the puncture mechanism is configured such that the coupling of the push-in part and the center part by the coupling part being maintained constantly as the initial position of the center part is moved and a part of the center part is moved along the hole.

6. The medical fluid administration device according to claim 5,

wherein the coupling part is attached in a freely rotating manner with respect to the fixed part, and

wherein the coupling part is configured to slide the center part along the base while a part of the center part moves along the hole by rotating with the pushing in of the push-in part.

7. The medical fluid administration device according to claim 5,

wherein the housing unit has a top surface, a bottom surface, and a side surface extending from the top surface to the bottom surface;

and

wherein the dial is rotatably operable by the user via an opening in the top surface of the housing unit.

8. The medical fluid administration device according to claim 5,

wherein, when the rotation of the dial with respect to the fixed part changes a tilt of the base with respect to the fixed part, the tilt of the base is changed with respect to the push in part.

9. A puncture device comprising:

a housing unit including a top surface, a bottom surface, a side surface extending from the top surface to the bottom surface, and an attachment surface located at the bottom surface and configured to be attached to a body surface of a user, the housing unit defining a space therein;

a puncture needle including an outer needle and an inner catheter, wherein at least a portion of the inner catheter is located in the outer needle, and wherein the puncture needle is configured to be moved from a first location at which an entirety of the puncture needle is located in the space in the housing unit to a second location at which the puncture needle projects from the attachment surface to be punctured into a body of the user;

a puncture mechanism comprising a base configured to act as a guide when sliding the outer needle, the puncture mechanism being configured to cause the puncture needle, in which a distal end portion of the inner catheter is inserted in the outer needle, to project out from the attachment surface by sliding the outer needle along the base, and to pull back only the outer needle of the puncture needle into the housing unit with the inner catheter of the puncture needle indwelled in the body; and

a puncture angle adjustment mechanism configured to adjust a puncture angle of the puncture needle, which is an angle of the puncture needle with respect to the attachment surface, the puncture angle adjustment mechanism comprising;

a fixed part that is fixed to the housing unit and that supports the base in a freely tiltable manner, and

a dial that is accessible from a location outside the housing unit via an opening in the top surface of the housing unit, so as to be rotatably operable by a user via the opening such that, when the dial is rotated by the user, the rotation of the dial with respect to the fixed part changes a tilt of the base with respect to the fixed part, and the puncture angle is thereby adjusted.

10. A medical fluid administration device comprising:

a housing unit including a top surface, a bottom surface, a side surface extending from the top surface to the bottom surface, and an attachment surface located at the bottom surface and configured to be attached to a body surface of a user, the housing unit defining a space therein;

a puncture needle including an outer needle and an inner catheter, wherein at least a portion of the inner catheter is located in the outer needle, and wherein the puncture needle is configured to be moved from a first location at which an entirety of the puncture needle is located in the space in the housing unit to a second location at which the puncture needle projects from the attachment surface to be punctured into a body of the user;

a puncture mechanism comprising a base configured to act as a guide when sliding the outer needle, the puncture mechanism being configured to cause the puncture needle, in which a distal end portion of the inner catheter is inserted in the outer needle, to project out from the attachment surface by sliding the outer needle along the base, and to pull back only the outer needle of the puncture needle into the housing unit with the inner catheter of the puncture needle indwelled in the body;

a medical fluid storage unit configured to store a medical fluid;

a feeding unit configured to feed the medical fluid stored in the medical fluid storage unit into the body through the puncture needle; and

a puncture angle adjustment mechanism configured to adjust a puncture angle of the puncture needle, which is an angle of the puncture needle with respect to the attachment surface, the puncture angle adjustment mechanism comprising;

a fixed part that is fixed to the housing unit and that supports the base in a freely tiltable manner, and

a dial that is accessible from a location outside the housing unit via an opening in the top surface of the housing unit, so as to be rotatably operable by a user via the opening such that, when the dial is rotated by the user, the rotation of the dial with respect to the fixed part changes a tilt of the base with respect to the fixed part, and the puncture angle is thereby adjusted.