Prefilled syringe, syringe assembly, method for manufacturing prefilled syringe, and method for increasing surface area

Patent metadata

Field	Value
Publication number	US-2022001108-A1
Application number	US-202117365316-A
Country	US
Kind code	A1
Filing date	Jul 1, 2021
Priority date	Jul 1, 2020
Publication date	Jan 6, 2022
Grant date	—

Abstract

A prefilled syringe includes a barrel body, a gasket that seals a proximal end side of a medicine chamber of the barrel body, and a cap that is attached to a tip and seals a distal end side of the medicine chamber. The cap includes a surface area increasing member that extends to the proximal end side, is inserted into a flow path of the tip, and protrudes to the medicine chamber to increase a surface area of a medicine solidified in a lump in the medicine chamber.

First claim

What is claimed is:

1 . A prefilled syringe comprising:
a barrel body including a cylindrical body portion having a medicine chamber in which a medicine is sealed, a shoulder portion formed at a distal end of the body portion and having a reduced diameter of the body portion, and a tip extending from a distal end of the shoulder portion toward a distal end side and having a flow path formed in the tip; a gasket configured to be inserted into the body portion and to seal a proximal end side of the medicine chamber; and a cap configured to be attached to the tip and to seal a distal end side of the medicine chamber, wherein the cap includes a surface area increasing member that extends toward a proximal end side and configured to be inserted into the flow path of the tip, and protrudes toward the medicine chamber to increase a surface area of the medicine that has been solidified in a lump in the medicine chamber.

2 . The prefilled syringe according to claim 1 , wherein the surface area increasing member includes a protrusion protruding to a portion on a proximal end side of the shoulder portion.

3 . The prefilled syringe according to claim 1 , wherein an axial protrusion length of the surface area increasing member into the medicine chamber is longer than an axial length of a gap between the medicine and the gasket.

4 . The prefilled syringe according to claim 3 , wherein the medicine chamber seals the medicine solidified in a lump, and the surface area increasing member forms a recess or a through-hole in the solidified medicine.

5 . The prefilled syringe according to claim 4 , wherein the solidified medicine is fixed to a distal end side in the medicine chamber.

6 . The prefilled syringe according to claim 1 , wherein the medicine is a lyophilizate or a powder.

7 . The prefilled syringe according to claim 1 , wherein the surface area increasing member penetrates the solidified medicine in an axial direction, and when the cap is removed from the tip, the flow path of the tip communicates with a gap of the medicine chamber on the proximal end side of the solidified medicine.

8 . The prefilled syringe according to claim 1 , wherein a gap is formed between an outer peripheral portion of the surface area increasing member and an inner peripheral surface of a flow path of the tip.

9 . The prefilled syringe according to claim 1 , wherein the surface area increasing member includes a hollow portion in a central portion of the surface area increasing member.

10 . The prefilled syringe according to claim 1 , wherein the surface area increasing member includes a material having a hard core in the surface area increasing member.

11 . The prefilled syringe according to claim 1 , wherein the surface area increasing member is formed of a solid homogeneous material.

12 . The prefilled syringe according to claim 1 , wherein:
the cap includes a cap body connected to the barrel body; a plug that is supported by the cap body and closes the flow path of the tip; and the surface area increasing member extends from a body of the plug.

13 . A method for manufacturing the prefilled syringe according to claim 1 , comprising:
causing the surface area increasing member to protrude into the medicine chamber before the medicine in the medicine chamber is solidified into a lump.

14 . A surface area increasing method for increasing the surface area of the medicine solidified in the lump in the medicine chamber using the prefilled syringe according to claim 1 , the method comprising:
increasing the surface area of the medicine by relatively moving the surface area increasing member protruding to the medicine chamber with respect to the medicine when removing the cap.

15 . A syringe assembly comprising:
a barrel body including a cylindrical body portion having a medicine chamber configured to receive a medicine, a shoulder portion formed at a distal end of the body portion and having a reduced diameter of the body portion in a tapered shape, and a tip extending from a distal end of the shoulder portion toward a distal end side and having a flow path formed in the tip; and a cap configured to be attached to the tip and to seal a distal end side of the medicine chamber, wherein the cap includes a surface area increasing member that extends toward a proximal end side and is inserted into the flow path of the tip, and protrudes toward the medicine chamber to increase a surface area of the medicine that has been solidified in the medicine chamber.

16 . The syringe assembly according to claim 15 , wherein the surface area increasing member includes a protrusion protruding to a portion on a proximal end side of the shoulder portion.

17 . The syringe assembly according to claim 15 , wherein the medicine chamber is configured to seal the solidified medicine, and the surface area increasing member forms a recess or a through-hole in the solidified medicine.

18 . The syringe assembly according to claim 15 , wherein:
the cap includes a cap body connected to the barrel body; a plug that is supported by the cap body and closes the flow path of the tip; and the surface area increasing member extends from a body of the plug.

19 . A syringe assembly comprising:
a barrel body including a cylindrical body portion includes a medicine chamber configured to receive a medicine, a shoulder portion formed at a distal end of the body portion and having a reduced diameter of the body portion, and a tip extending from a distal end of the shoulder portion toward a distal end side and having a flow path formed in the tip; a gasket configured to be inserted into the body portion and to seal a proximal end side of the medicine chamber; and a cap configured to be attached to the tip and to seal a distal end side of the medicine chamber, wherein the cap includes a surface area increasing member that extends toward a proximal end side and configured to inserted into the flow path of the tip, and protrudes toward the medicine chamber.

20 . The syringe assembly according to claim 19 , wherein the surface area increasing member includes a protrusion protruding to a portion on a proximal end side of the shoulder portion.

Assignees

• Terumo Corp

Inventors

• Okihara Hitoshi
• Matsumoto Fumiya

Classifications

• A61M2005/3131

  specially adapted for improving sealing or sliding · CPC title

• A61M5/3202

  Devices for protection of the needle before use, e.g. caps (A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001) · CPC title

• A61M2005/3106

  Plugs for syringes without needle · CPC title

• A61M2202/064

  Powder · CPC title

• A61M5/1782 Primary

  Devices aiding filling of syringes in situ (combination of a vial and a syringe for transferring or mixing their contents A61J1/2096, filling of medical containers in general B65B3/003) · CPC title