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Retractable needle medical device for injecting fluid from a pre-filled cartridge

A technology of medical equipment and cylinder parts, which is applied in the field of equipment, and can solve the problems of the side wall of the needle point friction cover, etc.

Inactive Publication Date: 2004-01-07
MDC INVESTMENT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although using the cap retainer is safer than recapping the needle by hand, the contaminated needle is still exposed when the device is moved from the patient's mouth to the cap retainer used to recap the needle
Another problem associated with re-capping is that if the dentist is not careful when centering the needle into the cap, the needle tip will rub against the side wall of the cap

Method used

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  • Retractable needle medical device for injecting fluid from a pre-filled cartridge
  • Retractable needle medical device for injecting fluid from a pre-filled cartridge
  • Retractable needle medical device for injecting fluid from a pre-filled cartridge

Examples

Experimental program
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Effect test

Embodiment Construction

[0019] see now in general Figure 1-10 ,in particular figure 1 , the overall landmark of medical devices is 10. The device has a hollow housing 20 for receiving a prefilled cartridge 60 . A needle 50 with a sharp point is also provided to pierce the patient's liver. Plunger 40 is operable to expel medicament from barrel 60 and through needle 50 into the patient. After performing an injection, the needle can be temporarily retracted by pushing the button 33 . The spring 55 then moves the needle backwards, thereby enclosing the sharp point of the needle within the housing 20 . The needle is releasably retained by the first locking means in a first retracted position. The needle can then be re-extended by moving the plunger 40 forward, thereby moving the needle 50 forward, until the button 33 reengages the front locking device. A subsequent injection can be performed on the patient by moving the plunger 40 further forward. In this way, multiple injections can be administer...

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PUM

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Abstract

A device (10) for injecting fluid from a pre-filled cartridge (60) is provided. The device (10) includes a needle (50) for piercing a patient. After an injection, the needle (50) can be retracted to prevent inadvertent contact with the contaminated needle (50). A needle retainer (30) releasably retains the needle (50) in the retracted position. The needle (50) can subsequently be re-extended to administer a subsequent injection. After cartrdige (60) is emptied, the cartridge (60) can be removed, if desired, and replaced with another cartridge for additional injections. Alternatively, the needle (50) can be substantially permanently retracted into the device and safely disposed of in a sharps container.

Description

technical field [0001] The present invention relates to needle bearing medical devices having retractable needles for injecting fluids into a patient. More particularly, the present invention relates to such a device configured for injecting fluid from a prefilled cartridge. Preferably, the needle is selectively retractable and re-extendable during use to allow a contaminated needle to be isolated between successive needle injections. In an embodiment of the invention, the needle may be permanently retracted after use, thereby isolating the contaminated needle from accidental contact with the sharp tip of the needle. Background technique [0002] Many types of medical devices used for diagnosis or treatment employ needles that are used to pierce the skin of a patient. One such device is a device for introducing a medicament from a prefilled cartridge into a patient. Disposal of such medical devices after the needle has been removed from the patient can lead to the spread ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/24A61M5/32
CPCA61M5/3257A61M5/326A61M5/3271A61M2005/3263A61M5/24
Inventor R·麦克维蒂J·巴克尔M·J·博蒂希T·哈尔塞斯
Owner MDC INVESTMENT HLDG
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