CA2424955C - Prewarning device for instillation of medical liquid - Google Patents
Prewarning device for instillation of medical liquid Download PDFInfo
- Publication number
- CA2424955C CA2424955C CA 2424955 CA2424955A CA2424955C CA 2424955 C CA2424955 C CA 2424955C CA 2424955 CA2424955 CA 2424955 CA 2424955 A CA2424955 A CA 2424955A CA 2424955 C CA2424955 C CA 2424955C
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- Canada
- Prior art keywords
- medical liquid
- instillation
- tubular needle
- sensor
- prewarning device
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/36—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body
- A61M5/40—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body using low-level float-valve to cut off media flow from reservoir
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/162—Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/36—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests with means for eliminating or preventing injection or infusion of air into body
- A61M5/365—Air detectors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Emergency Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
A prewarning device for instillation of medical liquid includes a throttling cylinder having a tubular needle connected to an open top thereof. A pointed head portion of the tubular needle is inserted into a medical liquid bottle for the medical liquid to flow into the throttling cylinder via the tubular needle. A
portion of the tubular needle between the head portion and the throttling cylinder is transparent for a clamp to clamp therearound. A sensor is provided on the clamp to connect to a warning unit via a wire. The tubular needle defines a downward tapered inner space to receive a float therein. When the medical liquid bottle becomes empty, the float lowers in the tubular needle and is sensed by the sensor for the latter to actuate the warning unit to sound. The lowered float also blocks up the tubular needle to stop air from passing therethrough.
portion of the tubular needle between the head portion and the throttling cylinder is transparent for a clamp to clamp therearound. A sensor is provided on the clamp to connect to a warning unit via a wire. The tubular needle defines a downward tapered inner space to receive a float therein. When the medical liquid bottle becomes empty, the float lowers in the tubular needle and is sensed by the sensor for the latter to actuate the warning unit to sound. The lowered float also blocks up the tubular needle to stop air from passing therethrough.
Description
PREWARNING DEVICE FOR INSTILLATION OF MEDICAL LIQUID
TECHNICAL FIELD
The present invention relates to = prewarning device for instillation of medical liquid and more particularly to a prewarning device that buzzes and stops air from passing thereth--rough to en'ter a patient's vessel when a medical liquid being transfused to the patient via instillation is used up.
3ACKGROUND OF THE TNVEi'vTTION
It is a very common practice in a hospital to transfuse a medical liquid from a botL-le into a patient's vessel via an instillation kit that usually includes a duct connected at an end to the medical li_quid bottle and at another end to an injection needle. A patient's attendant family andJor a nurse has to visually check from time to time the medical liquid remained i.n the bottle, in order to timely replace a-riew bottle of medical liquid to continue the transfusion. It is, however, time and labor corisuming for the patient's attendant family and the nurse to do such constant visual check of rernGined medical liquid being transfused via instillation.
The present invention discloses a prewarning device for instillation of inedical. liquid in an attempt to solve the above-mentioned problem. it ~s desirable the present invention is helpful in assisting nurses in looking after the patients and reducing the burdens of the attendant family. In the modern society that requires high efficiency in time and money, good and reasonable allocation of manpower is particularly important. Therefore, the present invention is eventually cost-effective when viewing from the standpoint of economics.
BACKGROUND ART
Taiwanese Patent Application No. 87218082 published on August 1, 2000 under publication number 400736 discloses an auto alarm for quantitative intravenous injection via instillation. The auto alarm includes a sensing means, a warning means, and a shutting means. When a distillation device is hung on a rack, a specific medical liquid is allowed to flow via a duct into a measuring cylinder, below which a fixing clamp is provided. When the level of the specific medical liquid in the measuring cylinder gradually lowered during the instillation, a float in the measuring cylinder descends at the same time to finally actuate a sensing switch to close a circuit thereof and allow an electric current to flow therethrough, resulting in sounding of a buzzer and lighting of a light-emitting diode. At this point, a current flows via a signal socket to the shutting means, and a hook is pulled through control of an electromagnetic valve to bend the duct and thereby shut the flow of the medical liquid. With the above arrangements, a nurse or an attendant family of the patient is reminded to timely replenish the medical liquid to avoid entrance of air into the vessel to endanger the Datient. A disadvantage of the above-described auto alarm of prior art is it is not conveniently portable and usable because the measur-ing cylinder, the duct, the medical liquid container, and all other accessories thereof are serially connected.
Moreover, since the shutting means must be addit~_onally provided to achieve the effect of shutting the medical liquid, additional inanufacturing cost for the shutting means is required. The operating of the independent shutting means is also troublesome.
It is therefore tried by the inventor to develop a prewarning device for instillation of inedical liquid, so that the device automatically buzzes and stops air from passing therethrough to enter a patient's vessel when the medical liquid being transfused to the patient via instillation is used up.
SUMMARY OF THE INVENTyON
The prewarning device for instillation of medical liquid according to the present invention mainly includes a throttling cylinder, a transparent tubul_ar needle fixedly connected at a lower end to an open top of the throttling cylinder, a clamp provided with a sensor for clamping around a lower part of the tubular needle, and a warrLing unit connected to the sensor on the clamp via a wire. The tubular needle has a forward tapered head portion with a plurality of spaced slits and defines a downward tapered inner space in which a float is disposed. When the head oortion of the tubular needle is inserted into a bottle containing a medical liquid to be transfused into a patient's vessel by way of instillation, the medical liquid flows from the bottle into the downward tapered inner space of the tubular needle via the slits and the float is normally located at a wider upper part of the tubular needle. When the medical liquid in the bottle is used up, the float lowers to clog a narrower lower part of the downward tapered inner space of the tubular needle. At this point, air is stopped from passing the clogged tubular needle to enter the patient's vessel, and the sensor senses the float at the lowered position and actuates the warning unit to buzz, informing the patient's attendant family or a nurse to remove the empty bottle or replace a new bottle of medical liquid.
An aspect of the invention provides a prewarning device for instillation of medical liquid, comprising: a throttling cylinder; a transparent tubular needle being fixedly connected to said throttling cylinder and provided at a forward tapered head portion with a plurality of spaced slits for inserting into a bottle containing a medical liquid to be transfused into a patient's vessel by way of instillation, and said tubular needle defining a downward tapered inner space in which a float is disposed; a clamp having two front claw ends adapted to clamp around a lower part of said tubular needle, and a sensor provided at an inner surface of one of said two front claw ends; and a warning unit electrically connected to said sensor on said clamp; and said float gradually moving downward to a bottom of said tubular needle when the medical liquid in the bottle is used up in the instillation, and said sensor being able to sense said float at the bottom of said tubular needle and actuate said warning unit to emit a warning sound.
TECHNICAL FIELD
The present invention relates to = prewarning device for instillation of medical liquid and more particularly to a prewarning device that buzzes and stops air from passing thereth--rough to en'ter a patient's vessel when a medical liquid being transfused to the patient via instillation is used up.
3ACKGROUND OF THE TNVEi'vTTION
It is a very common practice in a hospital to transfuse a medical liquid from a botL-le into a patient's vessel via an instillation kit that usually includes a duct connected at an end to the medical li_quid bottle and at another end to an injection needle. A patient's attendant family andJor a nurse has to visually check from time to time the medical liquid remained i.n the bottle, in order to timely replace a-riew bottle of medical liquid to continue the transfusion. It is, however, time and labor corisuming for the patient's attendant family and the nurse to do such constant visual check of rernGined medical liquid being transfused via instillation.
The present invention discloses a prewarning device for instillation of inedical. liquid in an attempt to solve the above-mentioned problem. it ~s desirable the present invention is helpful in assisting nurses in looking after the patients and reducing the burdens of the attendant family. In the modern society that requires high efficiency in time and money, good and reasonable allocation of manpower is particularly important. Therefore, the present invention is eventually cost-effective when viewing from the standpoint of economics.
BACKGROUND ART
Taiwanese Patent Application No. 87218082 published on August 1, 2000 under publication number 400736 discloses an auto alarm for quantitative intravenous injection via instillation. The auto alarm includes a sensing means, a warning means, and a shutting means. When a distillation device is hung on a rack, a specific medical liquid is allowed to flow via a duct into a measuring cylinder, below which a fixing clamp is provided. When the level of the specific medical liquid in the measuring cylinder gradually lowered during the instillation, a float in the measuring cylinder descends at the same time to finally actuate a sensing switch to close a circuit thereof and allow an electric current to flow therethrough, resulting in sounding of a buzzer and lighting of a light-emitting diode. At this point, a current flows via a signal socket to the shutting means, and a hook is pulled through control of an electromagnetic valve to bend the duct and thereby shut the flow of the medical liquid. With the above arrangements, a nurse or an attendant family of the patient is reminded to timely replenish the medical liquid to avoid entrance of air into the vessel to endanger the Datient. A disadvantage of the above-described auto alarm of prior art is it is not conveniently portable and usable because the measur-ing cylinder, the duct, the medical liquid container, and all other accessories thereof are serially connected.
Moreover, since the shutting means must be addit~_onally provided to achieve the effect of shutting the medical liquid, additional inanufacturing cost for the shutting means is required. The operating of the independent shutting means is also troublesome.
It is therefore tried by the inventor to develop a prewarning device for instillation of inedical liquid, so that the device automatically buzzes and stops air from passing therethrough to enter a patient's vessel when the medical liquid being transfused to the patient via instillation is used up.
SUMMARY OF THE INVENTyON
The prewarning device for instillation of medical liquid according to the present invention mainly includes a throttling cylinder, a transparent tubul_ar needle fixedly connected at a lower end to an open top of the throttling cylinder, a clamp provided with a sensor for clamping around a lower part of the tubular needle, and a warrLing unit connected to the sensor on the clamp via a wire. The tubular needle has a forward tapered head portion with a plurality of spaced slits and defines a downward tapered inner space in which a float is disposed. When the head oortion of the tubular needle is inserted into a bottle containing a medical liquid to be transfused into a patient's vessel by way of instillation, the medical liquid flows from the bottle into the downward tapered inner space of the tubular needle via the slits and the float is normally located at a wider upper part of the tubular needle. When the medical liquid in the bottle is used up, the float lowers to clog a narrower lower part of the downward tapered inner space of the tubular needle. At this point, air is stopped from passing the clogged tubular needle to enter the patient's vessel, and the sensor senses the float at the lowered position and actuates the warning unit to buzz, informing the patient's attendant family or a nurse to remove the empty bottle or replace a new bottle of medical liquid.
An aspect of the invention provides a prewarning device for instillation of medical liquid, comprising: a throttling cylinder; a transparent tubular needle being fixedly connected to said throttling cylinder and provided at a forward tapered head portion with a plurality of spaced slits for inserting into a bottle containing a medical liquid to be transfused into a patient's vessel by way of instillation, and said tubular needle defining a downward tapered inner space in which a float is disposed; a clamp having two front claw ends adapted to clamp around a lower part of said tubular needle, and a sensor provided at an inner surface of one of said two front claw ends; and a warning unit electrically connected to said sensor on said clamp; and said float gradually moving downward to a bottom of said tubular needle when the medical liquid in the bottle is used up in the instillation, and said sensor being able to sense said float at the bottom of said tubular needle and actuate said warning unit to emit a warning sound.
BRIEF DESCRIPTION OF THE DRAWINGS
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein Fig. 1 is an exploded perspective view of a prewarning device for instillation of medical liquid according to the present invention;
Fig. 2 is a partially assembled perspective view of the prewarning device of Fig. 1, showing a tubular needle has been connected to a throttling cylinder thereof;
4a Fig. 3 shows a clamp of the prewarning device of Fig. 1 has been attached to a lower part of the tubular needle;
Figs. 4, 5 and 6 show a. float in the tubular needle moves downward with the decreasing medical liquid being transfused to a patient by -Way of instillation;
Fig. 7 shows a first embodiment of the present invention; and Fig. 8 shows a second embodimertit of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Please refer to Fig. 1 that is an e:xploded perspective view of a prewarning device for _nstillation of inedical liquid according to the present invention. As shown, the prewarning device mainly includes a throttling cylinder 1, a tubular needle 2 fixedly connected to a top of the throttling cylinder I. a clamp 3 adapted to clamp around the tubular needle 2 at a predetermined position, and a warning unit 4 connected to the clamp 3 via a wire.
The throttling cylinder '! is a hollow cylindrical member having an open top 11 and a closed bottom provided with a hole 12. Other related medical appliances, such as duct setting button, needle cannula, instillation duct, etc:., are externally connected to the throttling cylinder 1 via the hole 12.
The tubular needle 2 is provided at, a lower end with a disc portion 23 configured to securely _f4-t into the open top 11 of the throttling cylinder 1, and a filtering bag 25 made of a web-like dense fabric connected to a lower periphery of the disc portion 23.
When the tubular needle 2 is fitted in the top opening 11 of the throttling cylinder 1, the filtering bag 25 is located inside the throttling cy.linder, as shown ?n Fig. 2, to serve as means for filtering a liquid flowing therethrough. However, the filtering bag 25 is not a necessary constituent element. That is, om:_ssion of the filtering bag 25 from the present invention does not adversely affect the implementation of the present invention at all. A head portion of the tubular needle 2 opposite to the disc portion 23 anca the filtering bag is coniigured for inserting into a sealed mouth 51 20 of a bottle 5 containing a medical liquid 52 (see Figs.
4 to 6). The head portion of the tubular needle 2 is forward tapered and lengChwise provided with a plurality of spaced slits 21, via which the medical liquid 52 contained in the bottle 5 flows into the 25 tubular needle 2. The tubular needle defines a downward tapered inner space in which an oblong float 22 is disposed. When there is a sufficient amount of the medical liquid 52 flowing from the bottle 5 into the tubular needle 2 via the slits 21; the float 22 is always in a floating state and located at an upper position in the tubular needle 2. The tubular needle 2 is also provided around an outer wall at a position higher than the disc portion 23 by a predetermined distance with an. annular stopper 24 adapted to press against the mouth 51 of the bottle 5 when the tubular needle 2 is inserted into the bottle 5 by a suitable depth. At least a portion of the tubular needle 2 between the disc portion 23 and the annular stopper 24 is transparent.
Please refer to Fig. 3. The clamp 3 includes a left handle 31a and a right handle 31b t':_~.a-t have front claw ends and are pivotally connected. to each other by means of a tension spring 32, such that t'cae claw ends of the left and the right har.dles 31a, 31b are normally forced by the tension spring 32 to close to each other and define an opening 33 between them. The opening 33 is dimensioned for fitly clamping around the transparent portion. of the tubul ar needle 2 between the disc portion 23 and the annular stopper 25 and. is formed from two semicircular surfaces 33a, 33b that are inner wall surfaces of the claw ends of the handles 31a,, 31b.
A sensor 34 is attached to the semicircular surface 33b of the right handle 31b and electricall-y connected to the warning unit 4. A. spot lamp 35 is set in the claw end of the left handle 31a opposite to the sensor 34, so as to project a l_gh't beam from the semicircular surface 33a toward the sensor 34.
The warning unit 4 is electrically connected to the sensor 34 via a wire and includes at least a buzzer 41 and a plurality of warning lights 42. The buzzer 41 could be actuated by a s-1.gnal from the sensor 34 to emit warning sounds and cause a relevarit warning light 42 to flash, so as to inform the pa-tient's attendant family or a nu-rse when the medical liquid to be transfused is used up.
Please refer to Fig. 4. When the tapered head portion of the tubular needle 2 is inserted into the mouth 51 of the bottle 5 that is now turned upside down, the medical liquid 52 in the bottle 5 flows into the tubular needle 2 via the plurality of slits 21 at the head portion of the tubular needle and drops into the filtering bag 25 located in the throttling cylinder 1.
The medical liquid 52 in the filt-ering bag 25 penetrates the bag and drops into the throttling cylinder 1 to flow to, for example, a needle cannula via the hole 12 on the closed bottom of the throttling cylinder 1.
When the medical liquid 52 continuously flows through the tubular needle 2 to fill the same, the float 22 is kept in a floating state in the tubular needle 2, as shown in Fig. 4. As mentioned above, the tubular needle 2 is particularly configcired to define a downward tapered inner space and ari inner diameter of an upper part of the inner space is slightly larger than an outer diameter of the oblong f,_oat 22. This configuration prevents the float 22 floating in the tubu'Lar needle 2 from sealing the slits 21 and clogging the tubular needle 2, and therefore allows the medical liquid 52 to continuously flow into the tubular needle 2 via the slits 21. The spot lamp 35 on the clamp 3 clamped around the transparent porcion of the tubular needle 2 between the disc portion 23 and the annular stopper 25 keeps projecting the light beam that passes through the medical liquid 52 and is received by the sensor 34, enabling the sensor 34 connected to the warning unit 4 to lighten a relevant warning light 42 on the warning unit 46 ind.icating the instillation of the medical liqLlid 52 ~_s in a normal and safe condition.
Please further refer to Figs. 5 and G. When a level of the medical liquid 52 in the bottle 5 becomes lower than the slits 21 after the instillation has been done over a long time, the medical liquid 52 no longer flows from the bottle 5 into the tubular needle 2.
Meanwhile, the medical liquid 52 already flown into the tubular needle 2 keeps dropping into the filtering bag to gradually lower a level ef tl-ie medical liquid 52 20 in the tubular needle 2 and cause the float 22 to move downward at the same time. Since the tubular needle 2 is configured to have a downward tapered inner space, the lowering float 22 would finally clog a narrower lower part of the tubular needle 2 when all the medical 25 liquid 52 in the tubular needle 2 has dropped into the filtering bag 25, stopping any air from entering into the patient's vessel via the empty tubular needle 2 to endanger the patient.
When the float 22 clogs the lower part of- the tubular needle 2, it also blocks the light bea.m emitted from t..
J
the spot lamp 35. The sensor 34 that does not receive the light beam would immediately actuate the buzzer 41 on the warning unit ~'~ to emit warning sounds and cause another warning light 42 indicating an empty bottle 5 to flash, so that the patient's attendant family or the nurse is timely informed of the err~pty bottle 5 to replace the same with a new one. The warning unit 4 may also be additionally wired to a nursing station for the nursing attendants at a remote position to know the empty bottle 5 in a ward, so that treatment-related matters, such as replaci.nc; the empty medical liquid bottle, may be taken care in real ti;ne.
Figs. 7 and 8 show two embodiments of the present invention.
The following are some of the advantages of the prewarning device for instillation of inedical liquid according to t-ne present invention:
1o The device provides the function of stopping air from entering into the patient's vessel and enables omission of the conventional shutting means for the same ai_r-blocking purpose. This is achieved by way of fixedly connecting the tubular needle 2 to the throttling cylinder i and disposing the float 22 in the tubular needle 2 to contro~ the flow of the medical liquid 52 and block any ai.r.
2. The tubular needle 2 is fixedly connected to the throttling cylinder 1 to form an integral unit that could be more easily handled. A user needs only to hold the throttling cylinder 1 and insert the head portion of the tubular needle 2 into the mouth of the medical liquid bottle 5 to complete the preparatory work for instillation of the medical liquid.
An alternate form of the prewarning device of the present invention allows the device to be used with, for example, a blood transfusion bag that is not in the form of a typical bottle and contains light-impervious blood. In the alternate form of the prewa.rning device of the present invention, only the clamp 3 and the warning unit 4 are included, and the warning unit 4 is additionally provided with a. selector switch 43. When the clamp 3 is ciamped onto a transparent duct extended from the blood transfusion bag for delivering blood to a cannula, the selector switch 43 on the warning unit 4 is switched from a position corresponding to a normal instillation mode using the typical bottle 5 to a position corresponding to a blood transfusion mode using the blood transfusion bag. Since the blood is not impervious to light, the light beam emitted from the spot lamp 35 on the clamp 3 is not received by the 2.5 sensor 34 and the buzzer 41 on the warning unit 4 is not actuated to sound. However, when the blood has been fully delivered from the blood transfusion bag and the duct becomes transparent again, the light beam emitted from the spot lamp 35 is directly projected onto the sensor 34 with.out being blocked by the blood.
Thus, the buzzer 41 of the warning unit 4 is actuated by the sensor 34 to sound. In brief, the provision of the selector switch 43 allows the present invention to include only the clamp 3 and the warning unit 4 for use in transfusion of blood or other light-impervious fluid to prewarn an attendant family or a nurse of an empty blood transfusion bag.
The present invention has been described with a preferred embodiment thereof and it is understood that many changes and modifications in the described embodiment can be carried out without departing from the scope and the spirit of the invention that is intended to be Limited only by the apperided clairns a
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein Fig. 1 is an exploded perspective view of a prewarning device for instillation of medical liquid according to the present invention;
Fig. 2 is a partially assembled perspective view of the prewarning device of Fig. 1, showing a tubular needle has been connected to a throttling cylinder thereof;
4a Fig. 3 shows a clamp of the prewarning device of Fig. 1 has been attached to a lower part of the tubular needle;
Figs. 4, 5 and 6 show a. float in the tubular needle moves downward with the decreasing medical liquid being transfused to a patient by -Way of instillation;
Fig. 7 shows a first embodiment of the present invention; and Fig. 8 shows a second embodimertit of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Please refer to Fig. 1 that is an e:xploded perspective view of a prewarning device for _nstillation of inedical liquid according to the present invention. As shown, the prewarning device mainly includes a throttling cylinder 1, a tubular needle 2 fixedly connected to a top of the throttling cylinder I. a clamp 3 adapted to clamp around the tubular needle 2 at a predetermined position, and a warning unit 4 connected to the clamp 3 via a wire.
The throttling cylinder '! is a hollow cylindrical member having an open top 11 and a closed bottom provided with a hole 12. Other related medical appliances, such as duct setting button, needle cannula, instillation duct, etc:., are externally connected to the throttling cylinder 1 via the hole 12.
The tubular needle 2 is provided at, a lower end with a disc portion 23 configured to securely _f4-t into the open top 11 of the throttling cylinder 1, and a filtering bag 25 made of a web-like dense fabric connected to a lower periphery of the disc portion 23.
When the tubular needle 2 is fitted in the top opening 11 of the throttling cylinder 1, the filtering bag 25 is located inside the throttling cy.linder, as shown ?n Fig. 2, to serve as means for filtering a liquid flowing therethrough. However, the filtering bag 25 is not a necessary constituent element. That is, om:_ssion of the filtering bag 25 from the present invention does not adversely affect the implementation of the present invention at all. A head portion of the tubular needle 2 opposite to the disc portion 23 anca the filtering bag is coniigured for inserting into a sealed mouth 51 20 of a bottle 5 containing a medical liquid 52 (see Figs.
4 to 6). The head portion of the tubular needle 2 is forward tapered and lengChwise provided with a plurality of spaced slits 21, via which the medical liquid 52 contained in the bottle 5 flows into the 25 tubular needle 2. The tubular needle defines a downward tapered inner space in which an oblong float 22 is disposed. When there is a sufficient amount of the medical liquid 52 flowing from the bottle 5 into the tubular needle 2 via the slits 21; the float 22 is always in a floating state and located at an upper position in the tubular needle 2. The tubular needle 2 is also provided around an outer wall at a position higher than the disc portion 23 by a predetermined distance with an. annular stopper 24 adapted to press against the mouth 51 of the bottle 5 when the tubular needle 2 is inserted into the bottle 5 by a suitable depth. At least a portion of the tubular needle 2 between the disc portion 23 and the annular stopper 24 is transparent.
Please refer to Fig. 3. The clamp 3 includes a left handle 31a and a right handle 31b t':_~.a-t have front claw ends and are pivotally connected. to each other by means of a tension spring 32, such that t'cae claw ends of the left and the right har.dles 31a, 31b are normally forced by the tension spring 32 to close to each other and define an opening 33 between them. The opening 33 is dimensioned for fitly clamping around the transparent portion. of the tubul ar needle 2 between the disc portion 23 and the annular stopper 25 and. is formed from two semicircular surfaces 33a, 33b that are inner wall surfaces of the claw ends of the handles 31a,, 31b.
A sensor 34 is attached to the semicircular surface 33b of the right handle 31b and electricall-y connected to the warning unit 4. A. spot lamp 35 is set in the claw end of the left handle 31a opposite to the sensor 34, so as to project a l_gh't beam from the semicircular surface 33a toward the sensor 34.
The warning unit 4 is electrically connected to the sensor 34 via a wire and includes at least a buzzer 41 and a plurality of warning lights 42. The buzzer 41 could be actuated by a s-1.gnal from the sensor 34 to emit warning sounds and cause a relevarit warning light 42 to flash, so as to inform the pa-tient's attendant family or a nu-rse when the medical liquid to be transfused is used up.
Please refer to Fig. 4. When the tapered head portion of the tubular needle 2 is inserted into the mouth 51 of the bottle 5 that is now turned upside down, the medical liquid 52 in the bottle 5 flows into the tubular needle 2 via the plurality of slits 21 at the head portion of the tubular needle and drops into the filtering bag 25 located in the throttling cylinder 1.
The medical liquid 52 in the filt-ering bag 25 penetrates the bag and drops into the throttling cylinder 1 to flow to, for example, a needle cannula via the hole 12 on the closed bottom of the throttling cylinder 1.
When the medical liquid 52 continuously flows through the tubular needle 2 to fill the same, the float 22 is kept in a floating state in the tubular needle 2, as shown in Fig. 4. As mentioned above, the tubular needle 2 is particularly configcired to define a downward tapered inner space and ari inner diameter of an upper part of the inner space is slightly larger than an outer diameter of the oblong f,_oat 22. This configuration prevents the float 22 floating in the tubu'Lar needle 2 from sealing the slits 21 and clogging the tubular needle 2, and therefore allows the medical liquid 52 to continuously flow into the tubular needle 2 via the slits 21. The spot lamp 35 on the clamp 3 clamped around the transparent porcion of the tubular needle 2 between the disc portion 23 and the annular stopper 25 keeps projecting the light beam that passes through the medical liquid 52 and is received by the sensor 34, enabling the sensor 34 connected to the warning unit 4 to lighten a relevant warning light 42 on the warning unit 46 ind.icating the instillation of the medical liqLlid 52 ~_s in a normal and safe condition.
Please further refer to Figs. 5 and G. When a level of the medical liquid 52 in the bottle 5 becomes lower than the slits 21 after the instillation has been done over a long time, the medical liquid 52 no longer flows from the bottle 5 into the tubular needle 2.
Meanwhile, the medical liquid 52 already flown into the tubular needle 2 keeps dropping into the filtering bag to gradually lower a level ef tl-ie medical liquid 52 20 in the tubular needle 2 and cause the float 22 to move downward at the same time. Since the tubular needle 2 is configured to have a downward tapered inner space, the lowering float 22 would finally clog a narrower lower part of the tubular needle 2 when all the medical 25 liquid 52 in the tubular needle 2 has dropped into the filtering bag 25, stopping any air from entering into the patient's vessel via the empty tubular needle 2 to endanger the patient.
When the float 22 clogs the lower part of- the tubular needle 2, it also blocks the light bea.m emitted from t..
J
the spot lamp 35. The sensor 34 that does not receive the light beam would immediately actuate the buzzer 41 on the warning unit ~'~ to emit warning sounds and cause another warning light 42 indicating an empty bottle 5 to flash, so that the patient's attendant family or the nurse is timely informed of the err~pty bottle 5 to replace the same with a new one. The warning unit 4 may also be additionally wired to a nursing station for the nursing attendants at a remote position to know the empty bottle 5 in a ward, so that treatment-related matters, such as replaci.nc; the empty medical liquid bottle, may be taken care in real ti;ne.
Figs. 7 and 8 show two embodiments of the present invention.
The following are some of the advantages of the prewarning device for instillation of inedical liquid according to t-ne present invention:
1o The device provides the function of stopping air from entering into the patient's vessel and enables omission of the conventional shutting means for the same ai_r-blocking purpose. This is achieved by way of fixedly connecting the tubular needle 2 to the throttling cylinder i and disposing the float 22 in the tubular needle 2 to contro~ the flow of the medical liquid 52 and block any ai.r.
2. The tubular needle 2 is fixedly connected to the throttling cylinder 1 to form an integral unit that could be more easily handled. A user needs only to hold the throttling cylinder 1 and insert the head portion of the tubular needle 2 into the mouth of the medical liquid bottle 5 to complete the preparatory work for instillation of the medical liquid.
An alternate form of the prewarning device of the present invention allows the device to be used with, for example, a blood transfusion bag that is not in the form of a typical bottle and contains light-impervious blood. In the alternate form of the prewa.rning device of the present invention, only the clamp 3 and the warning unit 4 are included, and the warning unit 4 is additionally provided with a. selector switch 43. When the clamp 3 is ciamped onto a transparent duct extended from the blood transfusion bag for delivering blood to a cannula, the selector switch 43 on the warning unit 4 is switched from a position corresponding to a normal instillation mode using the typical bottle 5 to a position corresponding to a blood transfusion mode using the blood transfusion bag. Since the blood is not impervious to light, the light beam emitted from the spot lamp 35 on the clamp 3 is not received by the 2.5 sensor 34 and the buzzer 41 on the warning unit 4 is not actuated to sound. However, when the blood has been fully delivered from the blood transfusion bag and the duct becomes transparent again, the light beam emitted from the spot lamp 35 is directly projected onto the sensor 34 with.out being blocked by the blood.
Thus, the buzzer 41 of the warning unit 4 is actuated by the sensor 34 to sound. In brief, the provision of the selector switch 43 allows the present invention to include only the clamp 3 and the warning unit 4 for use in transfusion of blood or other light-impervious fluid to prewarn an attendant family or a nurse of an empty blood transfusion bag.
The present invention has been described with a preferred embodiment thereof and it is understood that many changes and modifications in the described embodiment can be carried out without departing from the scope and the spirit of the invention that is intended to be Limited only by the apperided clairns a
Claims (8)
1. A prewarning device for instillation of medical liquid, comprising:
a throttling cylinder;
a transparent tubular needle being fixedly connected to said throttling cylinder and provided at a forward tapered head portion with a plurality of spaced slits for inserting into a bottle containing a medical liquid to be transfused into a patient's vessel by way of instillation, and said tubular needle defining a downward tapered inner space in which a float is disposed;
a clamp having two front claw ends adapted to clamp around a lower part of said tubular needle, and a sensor provided at an inner surface of one of said two front claw ends; and a warning unit electrically connected to said sensor on said clamp; and said float gradually moving downward to a bottom of said tubular needle when the medical liquid in the bottle is used up in the instillation, and said sensor being able to sense said float at the bottom of said tubular needle and actuate said warning unit to emit a warning sound.
a throttling cylinder;
a transparent tubular needle being fixedly connected to said throttling cylinder and provided at a forward tapered head portion with a plurality of spaced slits for inserting into a bottle containing a medical liquid to be transfused into a patient's vessel by way of instillation, and said tubular needle defining a downward tapered inner space in which a float is disposed;
a clamp having two front claw ends adapted to clamp around a lower part of said tubular needle, and a sensor provided at an inner surface of one of said two front claw ends; and a warning unit electrically connected to said sensor on said clamp; and said float gradually moving downward to a bottom of said tubular needle when the medical liquid in the bottle is used up in the instillation, and said sensor being able to sense said float at the bottom of said tubular needle and actuate said warning unit to emit a warning sound.
2. The prewarning device for instillation of medical liquid as claimed in claim 1, wherein said throttling cylinder is a hollow cylindrical member having an open top and a closed bottom with a hole provided thereat.
3. The prewarning device for instillation of medical liquid as claimed in claim 1, wherein said tubular needle is connected to an open top of said throttling cylinder and includes an annular stopper provided at a position above said open top of said throttling cylinder by a predetermined distance, and said annular stopper being adapted to press against a mouth of said bottle after said tapered head portion of said tubular needle is inserted into said bottle.
4. The prewarning device for instillation of medical liquid as claimed in claim 1, wherein said clamp further includes a spot lamp set in the other one of said two front claw ends opposite to said sensor, so that light beam is normally projected from said spot lamp to said sensor.
5. The prewarning device for instillation for medical liquid as claimed in claim 1, wherein said warning unit includes a buzzer and a plurality of warning lights electrically connected to said sensor via a wire, and a selector switch for changing an actuating mode of said buzzer and said warning lights.
6. The prewarning device for instillation in a medical liquid as claimed in claim 2, wherein other related medical appliances are connected to said throttling cylinder via said hole provided at said closed bottom of said throttling cylinder.
7. The prewarning device for instillation of a medical liquid as claimed in claim 6 wherein the other related medical devices are selected from a group comprising a duct setting button, a needle cannula, and an instillation duct.
8. The prewarning device for instillation for medical liquid as claimed in claim 1, wherein said warning unit is additionally wired to a nursing station at a remote position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2424955 CA2424955C (en) | 2003-04-10 | 2003-04-10 | Prewarning device for instillation of medical liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2424955 CA2424955C (en) | 2003-04-10 | 2003-04-10 | Prewarning device for instillation of medical liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2424955A1 CA2424955A1 (en) | 2004-10-10 |
| CA2424955C true CA2424955C (en) | 2007-07-17 |
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ID=33136673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2424955 Expired - Fee Related CA2424955C (en) | 2003-04-10 | 2003-04-10 | Prewarning device for instillation of medical liquid |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2424955C (en) |
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2003
- 2003-04-10 CA CA 2424955 patent/CA2424955C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CA2424955A1 (en) | 2004-10-10 |
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