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EP-4740983-A1 - POSITIONAL MISALIGNMENT PREVENTION TOOL AND NEEDLELESS SYRINGE

EP4740983A1EP 4740983 A1EP4740983 A1EP 4740983A1EP-4740983-A1

Abstract

A positional misalignment prevention tool suppresses misalignment of an injector with respect to a target region of an eyeball being an injection target. The injector ejects a substance to be injected from an ejection portion port to the target region. The positional misalignment prevention tool includes a base disposed around an axis along an ejection direction of the substance to be injected, the base surrounding the periphery of the ejection portion, and an irregular portion provided on the target region side of the base.

Inventors

  • YAMAMOTO, YUZO

Assignees

  • Daicel Corporation

Dates

Publication Date
20260513
Application Date
20240703

Claims (12)

  1. A positional misalignment prevention tool configured to suppress misalignment of an injector with respect to a target region of an eyeball being an injection target, the injector being configured to eject a substance to be injected from an ejection portion to the target region, the positional misalignment prevention tool comprising: a base disposed around an axis along an ejection direction of the substance to be injected, the base surrounding a periphery of the ejection portion; and an irregular portion provided on the target region side of the base.
  2. The positional misalignment prevention tool according to claim 1, wherein the injector is a needleless injector configured to inject the substance to be injected into the target region without using an injection needle, by ejecting the substance to be injected from an ejection port being the ejection portion.
  3. The positional misalignment prevention tool according to claim 2, wherein the needleless injector includes a housing portion provided with a housing space in which the substance to be injected is housed and the ejection port from which the substance to be injected is ejected to the target region, and the base is attached to the housing portion of the needleless injector.
  4. The positional misalignment prevention tool according to claim 2, wherein the needleless injector includes a housing portion provided with a housing space in which the substance to be injected is housed and the ejection port from which the substance to be injected is ejected to the target region, and a holding portion configured to hold the housing portion, and the base is attached to the holding portion of the needleless injector.
  5. The positional misalignment prevention tool according to claim 1, wherein the ejection portion of the injector includes an injection needle, and the base is disposed at a position surrounding the injection needle around the axis.
  6. The positional misalignment prevention tool according to any one of claims 2 to 5, wherein the irregular portion includes a plurality of protrusions around the axis, and a contact surface of each of the protrusions that is to come into contact with the eyeball is formed along a predetermined curved surface corresponding to the eyeball.
  7. An injector configured to eject a substance to be injected from an ejection portion to a target region of an eyeball being an injection target, the injector comprising: a housing portion provided with a housing space in which the substance to be injected is housed and the ejection portion from which the substance to be injected is ejected to the target region; and a positional misalignment prevention tool configured to suppress misalignment of the injector with respect to the target region, wherein the positional misalignment prevention tool includes a base disposed around an axis along an ejection direction of the substance to be injected, the base surrounding a periphery of the ejection portion, and an irregular portion provided on a surface, of the base, facing the target region.
  8. The injector according to claim 7, wherein the injector is a needleless injector configured to inject the substance to be injected into the target region without using an injection needle by ejecting the substance to be injected from an ejection port being the ejection portion.
  9. The injector according to claim 8, wherein the base is attached to the housing portion of the needleless injector.
  10. The injector according to claim 8, further comprising: a holding portion configured to hold the housing portion, wherein the base is attached to the holding portion of the needleless injector.
  11. The injector according to claim 7, wherein the ejection portion includes an injection needle, and the base is disposed at a position surrounding the injection needle around the axis.
  12. The injector according to any one of claims 7 to 11, wherein the irregular portion includes a plurality of protrusions around the axis, and a contact surface of each of the protrusions that is to come into contact with the eyeball is formed along a predetermined curved surface corresponding to the eyeball.

Description

Technical Field The present invention relates to a positional misalignment prevention tool and a needleless injector. Background Art Patent Document 1 discloses a device that delivers a drug into an eye. The device includes a housing, at least one nozzle provided at a portion of the housing, a supply source of the drug in the housing, and an energy source that provides pressure for discharging the drug to the outside of the housing through the at least one nozzle. Citation List Patent Document Patent Document 1: JP 2007-044529 A Summary of Invention Technical Problem The device of Patent Document 1 is not equipped with a configuration for suppressing misalignment of an injection position due to movement of a patient or the like, for example, when the drug is injected into the patient. Therefore, there is a problem that a tear may occur when the injection position is misaligned during the injection of the drug. In view of the above-described circumstances, an object of the present disclosure is to suppress misalignment of an injector with respect to a target region of an eyeball. Solution to Problem In order to solve the problem described above, a positional misalignment prevention tool of the present disclosure is a positional misalignment prevention tool configured to suppress misalignment of an injector with respect to a target region of an eyeball being an injection target. The injector is configured to eject a substance to be injected from an ejection portion to the target region. The positional misalignment prevention tool includes a base disposed around an axis along an ejection direction of the substance to be injected, the base surrounding a periphery of the ejection portion, and an irregular portion provided on the target region side of the base. In the positional misalignment prevention tool, the injector may be a injector configured to inject the substance to be injected into the target region without using an injection needle, by ejecting the substance to be injected from an ejection port being the ejection portion. In the positional misalignment prevention tool, the needleless injector may include a housing portion provided with a housing space in which the substance to be injected is housed and the ejection port from which the substance to be injected is ejected to the target region, and the base may be attached to the housing portion of the needleless injector. In the positional misalignment prevention tool, the needleless injector may include a housing portion provided with a housing space in which the substance to be injected is housed and the ejection port from which the substance to be injected is ejected to the target region, and a holding portion configured to hold the housing portion, and the base may be attached to the holding portion of the needleless injector. In the positional misalignment prevention tool, the ejection portion of the injector may include an injection needle, and the base may be disposed at a position surrounding the injection needle around the axis. In the positional misalignment prevention tool, the irregular portion may include a plurality of protrusions around the axis, and a contact surface of each of the protrusions that is to come into contact with the eyeball may be formed along a predetermined curved surface corresponding to the eyeball. In order to solve the problem described above, a needleless injector of the present disclosure is an injector configured to eject a substance to be injected from an ejection portion into a target region of an eyeball being an injection target. The injector includes a housing portion provided with a housing space in which the substance to be injected is housed and the ejection portion from which the substance to be injected is ejected to the target region, and a positional misalignment prevention tool configured to suppress misalignment of the needleless injector with respect to the target region. The positional misalignment prevention tool includes a base disposed around an axis along an ejection direction of the substance to be injected, the base surrounding a periphery of the ejection portion, and an irregular portion provided on a surface, of the base, facing the target region. The injector may be a needleless injector configured to inject the substance to be injected into the target region without using an injection needle by ejecting the substance to be injected from an ejection port being the ejection portion. In the injector, the base may be attached to the housing portion of the needleless injector. The injector may further include a holding portion configured to hold the housing portion, and the base may be attached to the holding portion of the needleless injector. In the injector, the ejection portion may include an injection needle, and the base may be disposed at a position surrounding the injection needle around the axis. In the injector, the irregular portion may include a plurality of protrusions around the