초록 ▼

A vial adapter is provided with a fitting portion which can be fitted into the head portion of a vial, and a hollow needle with a side hole. The base end portion of the needle is provided with a stopper contact portion which contacts the top surface of a stopper when the fitting portion is fitted in

A vial adapter is provided with a fitting portion which can be fitted into the head portion of a vial, and a hollow needle with a side hole. The base end portion of the needle is provided with a stopper contact portion which contacts the top surface of a stopper when the fitting portion is fitted in the head portion of the vial. When the fitting portion is fitted in the head portion of the vial, the stopper contact portion contacts the top surface of the stopper, and the fitting portion is fixed to the head portion of the vial by a claw engaging with the head portion of the vial, and further, the region of the side hole nearest the base end portion of the needle is positioned either roughly at the bottom surface of the stopper or inside of the stopper.

대표청구항 ▼

1. A vial adapter comprising: a fitting portion, which has a flexible arm portion provided with a claw for engagement with a head portion of a vial and which can be fitted onto the head portion of the vial; anda hollow needle, which is disposed inside the fitting portion coaxially with the fitting p

1. A vial adapter comprising: a fitting portion, which has a flexible arm portion provided with a claw for engagement with a head portion of a vial and which can be fitted onto the head portion of the vial; anda hollow needle, which is disposed inside the fitting portion coaxially with the fitting portion, and which, when the fitting portion is fitted onto the head portion of the vial, pierces a stopper formed of an elastic material and that is mounted to the vial, anda hollow, tubular reduced-diameter adapter that can be mounted inside the fitting portion, wherein:a first reduced-diameter fitting portion, which is capable of being fitted onto a vial head portion having a first outside diameter smaller than a basic outside diameter with which the fitting portion can cope, is provided on one end side of the reduced-diameter adapter, and a first claw portion is provided on the inner circumferential side of the first reduced-diameter fitting portion;a second reduced-diameter fitting portion, which is capable of being fitted onto a vial head portion having a second outside diameter smaller than the first outside diameter, is provided on the other end side of the reduced-diameter adapter, and a second claw portion is provided on the inner circumferential side of the second reduced-diameter fitting portion;the vial adapter is provided therein with an adapter end insertion portion into which an end portion of the reduced-diameter adapter is inserted when the reduced-diameter adapter is mounted to the fitting portion; andthe reduced-diameter adapter can be mounted to the fitting portion in an orientation for enabling insertion of the first reduced-diameter fitting portion into the adapter end insertion portion, and can be mounted to the fitting portion in an orientation for enabling insertion of the second reduced-diameter fitting portion into the adapter end insertion portion. 2. The vial adapter according to claim 1, wherein: the fitting portion and the needle are configured as separate parts, andthe fitting portion is formed of a material that is softer than a material constituting the needle. 3. The vial adapter according to claim 1, wherein the fitting portion is provided in a side portion thereof with a window into which part of an outer circumferential portion of the head portion of the vial is inserted when the fitting portion is fitted onto the head portion of the vial. 4. The vial adapter according to claim 1, wherein: the reduced-diameter adapter is provided on one end side thereof with a first engaging portion operative to engage with the claw when the reduced-diameter adapter is mounted to the fitting portion in an orientation for enabling insertion of the second reduced-diameter fitting portion into the adapter end insertion portion; andthe reduced-diameter adapter is provided on the other end side thereof with a second engaging portion operative to engage with the claw when the reduced-diameter adapter is mounted to the fitting portion in an orientation for enabling insertion of the first reduced-diameter fitting portion into the adapter end insertion portion. 5. The vial adapter according to claim 4, wherein the distance from the first engaging portion of the reduced-diameter adapter to an end face of the other end of the reduced-diameter adapter and the distance from the second engaging portion of the reduced-diameter adapter to an end face of the one end of the reduced-diameter adapter are slightly shorter than the distance from the claw to a deepest region of the adapter end insertion portion. 6. The vial adapter according to claim 1, wherein the reduced-diameter adapter is provided, between the first claw portion and the second claw portion, with a partition wall formed with an opening portion, which is sized to permit insertion of the needle therein, and which is smaller than the first outside diameter. 7. The vial adapter according to claim 1, wherein the needle is provided at a proximal end portion thereof with a stopper contact portion, which abuts on a top surface of the stopper when the fitting portion is fitted onto the head portion of the vial, and when the fitting portion is fitted onto the head portion of the vial, the stopper contact portion abuts on the top surface of the stopper and the claw engages with the head portion of the vial, whereby the fitting portion is fixed to the head portion of the vial. 8. The vial adapter according to claim 7, wherein when the fitting portion is fitted onto the head portion of the vial, a region of the side hole nearest the proximal end of the needle is positioned either roughly at a back surface of the stopper or inside of the stopper. 9. The vial adapter according to claim 8, wherein the needle is provided with a groove portion extending from the region of the side hole nearest the distal end of the needle toward a needle point of the needle.