Patent Application
20140039237
1. Field of the Invention
The present invention is related to a medication dispensing device, and more particularly to a filling dispensing needle applied in dispensation of nuclear medicine that can keep the medication from being polluted.
2. Description of the Prior Arts
For imaging techniques of cancer diagnosis, the injection liquid of radioactive drugs used in positron emission tomography (PET) or single photon emission tomography (SPECT) is required to be dispensed. Such technique is generally applied in the research and development of radiopharmaceuticals in nuclear medicine and dispensation process thereof, as well as the research and development of drugs in biotechnology.
With reference to
Such medication dispensing device is required to operate in an environment in compliance with Class 100 laminar air ventilation. The import pipe 610 of the perfusion device 61 is attached in a prepared radioactive solution. The aeration needle 64 can balance the pressure between the inside and the outside the medication bottle 60 and, such that the medication bottle 60 will not burst along addition of the amount of the solution. However, as the dispensing needle 63 and the aeration needle 64 puncture into the plug 600 by the tip ends thereof, some scraps of the plug are created and stuck in the openings of the tip ends. Moreover, in the dispensing process, the scraps drop down to the medication bottle 60 that causes contamination therein. The configuration of the aeration needles 64 is easily resulting in direct connection between the inside and the outside of the medication bottle 60, such that the inside of the medication bottle 60 are more easily contaminated by external impurities and more difficult to keep aseptic. Therefore, in order to avoid the contamination in the medication bottle 60, the operation environment is need to be strictly controlled that makes the demands and costs of the equipment and condition mush higher, and the quality is hard to maintain. Also, the dispensing needle 63 can have a channel with a triangle section on the side wall thereof, and the channel is used for balancing pressure, and yet the problem about the scraps still exists.
To overcome the shortcomings, the present invention provides an improved medication dispensing device to mitigate and obviate the aforementioned problems.
In view of foregoing problems, since the scraps can be created and dropped down to the medication bottle and the inside and the outside of the medication bottle are connected directly when the dispensing needle and the aeration needle punctures into the plug, which cause the medication bottle is hard to keep aseptic inside due to contamination, the purpose of present invention is to provide a medication dispensing device to avoid the external contamination toward the medication bottle by improvement of the structure of the dispensing needle.
In order to achieve the objective, a medication dispensing device in accordance with the present invention is provided, and comprising:
Preferably, the plug is elastic, and the dispensing needle has a groove along the axial direction on the side wall of the dispensing needle and wrapped around tightly by the plug to form a pressurized seal part.
Preferably, the film of the filter has multiple pores with 0.22 μm of pore diameter to filter out particles and bacteria.
Preferably, the medication bottle, the perfusion device, the filter and the dispensing needle are arranged in an environment in compliance with Class 100 laminar air ventilation.
Preferably, the import pipe and the export pipe are made of material proof of acid and alkali.
A dispensing needle in accordance with the present invention is also provided, being a hollow tube and comprising:
Preferably, the second opening is formed close to the side wall of the lower end, thereby the second opening is located beneath the plug when the lower end punctures into the plug.
Preferably, the dispensing needle has a groove along the axial direction on the side wall of the dispensing needle.
Preferably, the shape of the section of the groove is triangle.
Accordingly, due to the injection of the medication solution into the medication bottle through the second opening of the dispensing needle, the process of puncturing aeration needle is not required, and the contamination of the medication solution by the external pollutant through the aeration needle or the opening of the medication bottle are reduced. The lower end of the dispensing needle is shrill, smooth and seamless, such that the dispensing needle can puncture into the plug of the medication bottle without creating any scraps, and thus the problem about scraps dropping into the medication bottle can be overcome. When the medication solution is injected into the medication bottle along the passageway of the dispensing needle, the vacuity of the medication bottle is decreasing to achieve the balance of pressure. When the medication solution stops injected, the plug will wrap the second opening of the dispensing needle, and air (including bacteria, particles, and so on) cannot flow freely along the passageway. Thus, the medication solution can be assured to be kept from external contamination, the demands of the condition and equipment can be made less, the quality can be controlled easily, and the costs can be reduced.
Since the groove is formed on the side wall of the dispensing needle, when the dispensing needle punctures into the plug in the operation of the medication dispensing device, the plug with elasticity can wrap tightly around the dispensing needle and the groove and form in a pressurized seal part that has less pressure. The pressurized seal part has a general effect of obstruction. When the pressure in the medication bottle increases to a default value with the addition of radioactive drug, the pressurized seal part with weaker strength will be forced to deform by the pressure, and thus the inside and the outside of the medication bottle are interconnected through the groove for releasing the accumulated air and pressure inside the medication bottle, thereby the smoothness of the dispensing process can be improved and the drugs can be kept from external contamination.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
The medication bottle 10 is a container, the medication bottle 10 provides to store prepared medication solution. The medication bottle 10 has an opening and a plug 11 installed in the opening. The plug 11 is elastic including corkwood or rubber.
The perfusion device 20 is a pump which has an import and an export. The import is connected to an import pipe 21, and the export is connected to an export pipe 22. The import pipe 21 and the export pipe 22 are made of material proof of acid and alkali. The import pipe 21 and the export pipe 22 are made of glass in the preferred embodiment.
The filter 30 has a film and an injection tube 31. The film has multiple pores with 0.22 μm of pore diameter. The filter 30 is connected to the export pipe 22.
With reference to
The upper end is connected to the injection tube 31 of the filter 30. The lower end punctures into the plug 11 of the medication bottle 10. Since the lower end is shrill, smooth and seamless, the dispensing needle 40 can puncture into the plug 11 without creating any scraps. With reference to
During the dispensing process, the medication dispensing device is arranged in an environment in compliance with Class 100 laminar air ventilation. The medication solution, such as radiopharmaceutical solution, is prepared in an apyrexia receptacle.
The import pipe 21 of the perfusion device 20 is attached into the medication solution of the apyrexia receptacle. The medication solution is pumped by the perfusion device 20 and passing through the import pipe 21, and then delivered to the filter through the export pipe 22 under pressure. After passing through the filter 30 to be filtered out particles and bacterium, the medication solution is delivered into the passageway 41 of the dispensing needle 40 via the injection tube 31 and then delivered to the medication bottle 10 through the second opening 42 of the passageway 42 to form a radioactive injection.
Accordingly, the medication solution can be injected into the medication bottle 10 through the second opening 42 of the dispensing needle 40. The lower end of the dispensing needle 40 is shrill, smooth and seamless, and thus the creation of scraps can be avoid during the puncture of the dispensing needle. Also, the problem of the scraps drooping into the medication bottle 10 can be solved. Furthermore, when the medication bottle 10 is filled with the medication solution by the dispensing needle 40, the vacuity in the medication bottle 10 gradually decreases during dispensing the medication solution and reach the balance of pressure. when stopping dispensing the medication solution, the plug 11 can wraps around the second opening 42, such that air (bacteria, particles, and so on) cannot flow freely through the passageway 11.
With reference to
During the operation of the medication dispensing device, when the dispensing needle 40A punctures into the plug 11A, the plug 11A that has elasticity can wrap tightly around the dispensing needle 40A and the groove 43A and form in a pressurized seal part that has less pressure. The pressurized seal part has a general effect of obstruction. When the pressure in the medication bottle 10A increases to a default value with the addition of radiopharmaceutical drugs, the pressurized seal part with weaker strength will be forced to deform by the pressure, and thus the inside and the outside of the medication bottle 10A are interconnected through the groove 43A for releasing the accumulated air and pressure inside the medication bottle 10A, thereby the smoothness of the dispensing process can be improved and the radiopharmaceutical drugs can be kept from external contamination.
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
