CA2015559C - Display device for indicating the internal pressure of the tube of an infusion pump - Google Patents
Display device for indicating the internal pressure of the tube of an infusion pumpInfo
- Publication number
- CA2015559C CA2015559C CA002015559A CA2015559A CA2015559C CA 2015559 C CA2015559 C CA 2015559C CA 002015559 A CA002015559 A CA 002015559A CA 2015559 A CA2015559 A CA 2015559A CA 2015559 C CA2015559 C CA 2015559C
- Authority
- CA
- Canada
- Prior art keywords
- tube
- internal pressure
- display
- infusion
- display elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- 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
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
- A61M5/16854—Monitoring, detecting, signalling or eliminating infusion flow anomalies by monitoring line pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S128/00—Surgery
- Y10S128/92—Computer assisted medical diagnostics
Abstract
A display device for indicating the internal pressure of a tube employed in an infusion device has an infusion drive for supplying an infusion fluid from a solution container to the human body through the tube and a sensor for detecting the internal pressure of the tube.
A message indicator includes a plurality of alphanumeric display elements which are respectively comprised of a plurality of segments and displays the internal pressure of the tube detected by the sensor. The display elements are used to display a value, in alphanumeric terms, corresponding to the internal pressure of the tube as detected by the sensor. The segments of the display elements are partly used to display the quantitative change of the pressure detected by the sensor as a bar graph.
A message indicator includes a plurality of alphanumeric display elements which are respectively comprised of a plurality of segments and displays the internal pressure of the tube detected by the sensor. The display elements are used to display a value, in alphanumeric terms, corresponding to the internal pressure of the tube as detected by the sensor. The segments of the display elements are partly used to display the quantitative change of the pressure detected by the sensor as a bar graph.
Description
The present invention relates to a display device for indicating the internal pressure of the tube of an infusion device, and more particularly, to a display device for informing the user, such as a nurse or hospital staff, of the pressure detected by an occlusion detector mounted on the downstream side of the tube for supplying an infusion fluid from a solution container to the human body through the tube.
Conventionally, in a medical infusion device, an infusion drive disposed on the tube thereof operates to infuse a fluid from a solution container to the human body through the tube. There are cases where a partial or total occlusion occurs in the tube between the infusion device and the patient. In order to detect such an occlusion, an occlusion detector comprising a sensor for detecting the tube internal pressure is mounted in the downstream side of an infusion drive means. The occlusion detector is connected to a microcomputer for controlling the operation of the infusion drive means. If the internal pressure of the tube exceeds a predetermined pressure, the operation of the infusion drive means is suspended and an alarm sounds based on the decision that the tube has been occluded.
As apparent from the above, conventionally, it is not until an alarm is given as a result of the halting of the infusion operation due to the occurrence of a tube occlusion that the user, is informed of the tube occlusion.
Such being the case, it is necessary for the user to carry out troublesome work in order to resume the infusion supply operation. In addition, known medical infusion devices have a disadvantage in that the infusion operation is suspended although a patient may require a continuous infusion. Further, it is necessary not only to check the cause of the tube occlusion but also whether or not the tube occlusion has been already released. Thus, it takes time and labour to resume the infusion operation.
The present invention has been made with a view to substantially solving the above-described disadvantage.
*
Its essential object is to provide a display device for continuously indicating the quantitative change of the tube internal pressure as readily observable information detected by a tube occlusion detector, so that the cause of the tube occlusion can be removed before the infusion operation is stopped.
In accomplishing these and other objects, the present device provides a display device for indicating the internal pressure of a tube of an infusion device having an infusion drive means for supplying an infusion fluid from a solution container to a human body through the tube and a sensor for detecting the internal pressure of the tube, said display device comprising: a message indicator for displaying the internal pressure of the tube detected by the sensor, the message indicator being provided with display elements adapted to display a value in alphanumeric terms, the value corresponding to the internal pressure of the tube detected by the sensor; and wherein predetermined segments of the display elements are adapted to display as a bar graph the quantitative change in the sensor-detected pressure.
More specifically, the sensor outputs data indicative of a detected pressure to a microcomputer which, in turn, compares the data inputted thereto with data indicative of a predetérmined tube occlusion detecting reference pressure so as to decide whether or not the internal pressure of the tube is greater than the predetermined tube occlusion detecting reference pressure.
Based on the decision, the display elements of the message indicator connected to the microcomputer are energized. If the internal pressure of the tube has reached the predetermined tube occlusion detecting reference pressure, the operation of the infusion drive means is stopped by the microcomputer.
Alphanumeric or 7-segment numeric display elements are used as the display elements of the message la~
indicator, and utilize some segments of the display elements, for example, the horizontal bar segments at the bottom line, arranged so that the number of horizontal bar segments energized, increases to extend the display length as the internal pressure of the tube increases.
Since the quantitative change of the internal pressure of the tube is displayed by means of a bar graph as described above, the user can easily find the change of the internal pressure of the tube. Accordingly, when the tube has been occluded by a patient's turning in bed or the like, the nurse can remove the cause before a total tube occlusion results in an arrest of delivery pressure.
These and other objects and features of the present invention will become apparent from the following description taken in conjunction with preferred embodiments thereof with reference to the accompanying drawings, throughout which like parts are designated by like reference numerals, and in which:
Fig. 1 is a schematic diagram showing an infusion device in accordance with the present invention;
Fig. 2 is a graph showing the characteristic of a sensor;
Figs. 3 and 4 are views showing a message indicator in accordance with the present invention;
Fig. 5 is a view showing another message indicator in accordance with the present invention; and Fig. 6 is a flowchart for describing the operation of the infusion device in accordance with the present invention.
Referring to Fig. 1 showing the entire construction of an infusion device according to an embodiment of the present invention, an infusion drive means 4 operates to infuse a drip infusion contained in a solution container 1 into the human body 3 through a tube 2. A sensor 5 which functions to detect a tube occlusion, is mounted on the tube 2 in contact therewith, on the . ~
~. .f .
downstream side of the infusion drive means 4. The tube 2 is made of an elastic material so that the outer diameter varies according to the change in the internal pressure thereof. The sensor 5 positioned in contact with the tube 2 detects the change in the outer diameter of the tube 2 to find the change in the tube internal pressure. As shown in Fig. 2, the sensor 5 is one whose signal output varies linearly in response to a change in the outer diameter of the tube 2. In Fig. 2, reference numeral RO denotes the outer diameter of the tube 2 in a normal condition and R1 denotes the outer diameter thereof detected by the sensor 5 when the diameter thereof has expanded as a result of a tube occlusion which has occurred in the downstream side thereof.
The sensor 5 is selected from a semiconductor sensor, a core-equipped coil sensor, a force displacement transducer, a distortion gauge or the like, provided that the resistance value, electric current value, voltage, or oscillation frequency value change linearly.
The sensor 5 is connected to a microcomputer 6, thus continuously outputting data indicative of the change of the internal pressure of the tube 2 to the microcomputer 6. A message indicator 7 as shown in Fig. 3 is connected with the microcomputer 6, and in response to an instruction signal outputted from the microcomputer 6, displays the internal pressure of the tube 2 as information that is easy for a nurse or hospital staff to observe. The microcomputer 6 is connected to a motor (not shown) for driving the infusion drive means 4, thus controlling the infusion drive means 4 so as to stop its operation when the internal pressure of the tube 2 exceeds a predetermined value. Reference numerals 8, 9, and 10 denote interfaces connected between the microcomputer 6 and the sensor 5, between the microcomputer 6 and the message indicator 7, between the microcomputer 6 and the infusion drive means 4, respectively.
As shown in Fig. 3, the message indicator 7 has a plurality of alphanumeric display elements (ten display elements 11 in the embodiment) shown disposed in two rows, an upper and lower row, for displaying alarm information.
The display elements 11 in the upper row (A) are used to display a plurality of warning message in, for instance the English language. More specifically, as segments 12 of the display elements 11 in the upper row (A) are energized, (as indicated in solid black) these segments 12 illuminate in the pattern of "FLOW CHECK". In the lower row (B), the internal pressure of the tube 2 is displayed by the segments 12 in the upper half of the display elements 11 and the lowermost line of horizontal bar segments 12a are used to display the internal pressure of the tube 2 in the form of a bar graph. Thus, in the example illustrated, in the lower row (B), the upper half segments 12 display the internal pressure of the tube 2 as "NORM OCC" (normal occlusion) which means that the internal pressure of the tube 2 has not reached the occlusion deciding value and the bar segments 12a in the lowermost line are sequentially energized from left to right in proportion to the present value of the internal pressure of the tube 2. In Fig. 3, all the bar segments 12a are energized, which means that the internal pressure of the tube 2 is sufficiently high that occlusion of the tube 2 is imminent.
When the infusion drive means 4 is stopped based on a decision that the tube 2 has been occluded, the message indicator 7 displays "OCCLUSION" as shown in Fig.
4.
In the message indicator 7, the internal pressure of the tube 2 is not only displayed by the alphanumeric display elements 11 as a text display but also displayed as a bar graph by utilizing some segments of the alphanumeric display elements 11. Thus, the user such as a nurse or hospital staff can easily know the quantitative change in the internal pressure of the tube 2 from the bar graph display.
The method for displaying the internal pressure of the tube 2 is not limited to the above-described embodiment. The following display methods can also be carried out: The upper half of the lower row (B) can be used to digitally display the internal pressure of the tube 2 instead of a text message. The upper row (A) can be used to display the internal pressure of the tube 2 in text display and the lower row (B) can be utilized for a bar graph display. In the above-described embodiment, the internal pressure of the tube 2 which can be displayed in two rows, however, may be displayed in only one row. The one row may be so arranged that by switching the display modes sequentially, so that, for instance a display in the English language appears first and, then, a digital display appears, thereafter a bar graph display appears. Instead of the alphanumeric display elements 11, numerical display elements 11' each comprising seven segments 12' as shown in Fig. 5 may be used. According to this display method, if two rows are provided, the upper row is used to make a digital display and the lower row is used to make a bar graph display. If only one row is provided, first, the internal pressure of the tube 2 is digitally displayed, then, displayed by a bar graph display.
Signals outputted from the sensor 5 are processed by the microcomputer 6 based on the flowchart of Fig. 6.
According to the instruction of the microcomputer 6, the segments 12 of the display elements 11 are energized or deenergized. The operation of the device according to one embodiment is described with reference to the flowchart of Fig. 6.
The delivery of an infusion fluid is started by the start of the motor operating the infusion drive means 4. The fluid is supplied from the solution container 1 to the human body 3 through the tube 2. The pressure of fluid ~A.
` 20155S9 flowing through the tube 2 is sampled by the sensor 5 every predetermined period of time and data indicative of the sampled value is outputted to the microcomputer 6. If the difference (X) obtained by subtracting the sampled value from a predetermined tube occlusion detecting reference value stored in the memory of the microcomputer 6 is positive, i.e., if the occlusion detection pressure is greater than the sample pressure, it is decided that the tube 2 is not occluded and the internal pressure of the tube 2 is detected according to the difference (X) and displayed by the message indicator 7. That, is, if the difference (X) is large, it is decided that the internal pressure of the tube 2 is small, so that only the bar segment 12a positioned on the left side is energized. The remaining bar segments 12a are sequentially energized one by one with the reduction of the difference (X).
Thus, the user such as the nurse observing a patient being infused is easily capable of monitoring the quantitative change in the internal pressure of the tube 2 according to the increase or decrease of the length of the bar display. Accordingly, if the bar display rapidly elongates, i.e., if the internal pressure of the tube 2 rapidly increases, the nurse can see that the patient's turning in bed has caused the tube 2 to be occluded. Thus, the nurse can remove the cause and return the increased internal pressure of the tube 2 to a normal pressure.
If the difference X is negative, that is, if the sampled pressure is greater than the predetermined occlusion detecting reference pressure, it is decided that the tube 2 has been occluded. When the tube 2 is occluded, simultaneously with the display of "OCCLUSION" displayed on the message indicator 7, the microcomputer 6 gives an instruction to stop the motor driving the infusion drive means 4.
As described above, in the message indicator for displaying the tube internal pressure, segments of the ,.
alphanumeric or numeric display element are used to display the internal pressure of the tube by means of a bar graph.
Therefore, the length of the bar display allows the user such as a nurse or the hospital staff to readily identify the quantitative change of the internal pressure of the tube. That is, the user can find whether or not the tube is being occluded. Further, an alarm sounds when the tube is occluding, so that the user can remove the cause of the occlusion and restore the tube-occluded condition to a normal condition before the delivery of the infusion fluid is stopped.
Although the present invention has been fully described in connection with the preferred embodiments thereof with reference to the accompanying drawings, it is lS to be noted that various changes and modifications are apparent to those skilled in the art. Such changes and modifications are to be understood as being included within the scope of the present invention as defined by the appended claims unless they depart therefrom.
Conventionally, in a medical infusion device, an infusion drive disposed on the tube thereof operates to infuse a fluid from a solution container to the human body through the tube. There are cases where a partial or total occlusion occurs in the tube between the infusion device and the patient. In order to detect such an occlusion, an occlusion detector comprising a sensor for detecting the tube internal pressure is mounted in the downstream side of an infusion drive means. The occlusion detector is connected to a microcomputer for controlling the operation of the infusion drive means. If the internal pressure of the tube exceeds a predetermined pressure, the operation of the infusion drive means is suspended and an alarm sounds based on the decision that the tube has been occluded.
As apparent from the above, conventionally, it is not until an alarm is given as a result of the halting of the infusion operation due to the occurrence of a tube occlusion that the user, is informed of the tube occlusion.
Such being the case, it is necessary for the user to carry out troublesome work in order to resume the infusion supply operation. In addition, known medical infusion devices have a disadvantage in that the infusion operation is suspended although a patient may require a continuous infusion. Further, it is necessary not only to check the cause of the tube occlusion but also whether or not the tube occlusion has been already released. Thus, it takes time and labour to resume the infusion operation.
The present invention has been made with a view to substantially solving the above-described disadvantage.
*
Its essential object is to provide a display device for continuously indicating the quantitative change of the tube internal pressure as readily observable information detected by a tube occlusion detector, so that the cause of the tube occlusion can be removed before the infusion operation is stopped.
In accomplishing these and other objects, the present device provides a display device for indicating the internal pressure of a tube of an infusion device having an infusion drive means for supplying an infusion fluid from a solution container to a human body through the tube and a sensor for detecting the internal pressure of the tube, said display device comprising: a message indicator for displaying the internal pressure of the tube detected by the sensor, the message indicator being provided with display elements adapted to display a value in alphanumeric terms, the value corresponding to the internal pressure of the tube detected by the sensor; and wherein predetermined segments of the display elements are adapted to display as a bar graph the quantitative change in the sensor-detected pressure.
More specifically, the sensor outputs data indicative of a detected pressure to a microcomputer which, in turn, compares the data inputted thereto with data indicative of a predetérmined tube occlusion detecting reference pressure so as to decide whether or not the internal pressure of the tube is greater than the predetermined tube occlusion detecting reference pressure.
Based on the decision, the display elements of the message indicator connected to the microcomputer are energized. If the internal pressure of the tube has reached the predetermined tube occlusion detecting reference pressure, the operation of the infusion drive means is stopped by the microcomputer.
Alphanumeric or 7-segment numeric display elements are used as the display elements of the message la~
indicator, and utilize some segments of the display elements, for example, the horizontal bar segments at the bottom line, arranged so that the number of horizontal bar segments energized, increases to extend the display length as the internal pressure of the tube increases.
Since the quantitative change of the internal pressure of the tube is displayed by means of a bar graph as described above, the user can easily find the change of the internal pressure of the tube. Accordingly, when the tube has been occluded by a patient's turning in bed or the like, the nurse can remove the cause before a total tube occlusion results in an arrest of delivery pressure.
These and other objects and features of the present invention will become apparent from the following description taken in conjunction with preferred embodiments thereof with reference to the accompanying drawings, throughout which like parts are designated by like reference numerals, and in which:
Fig. 1 is a schematic diagram showing an infusion device in accordance with the present invention;
Fig. 2 is a graph showing the characteristic of a sensor;
Figs. 3 and 4 are views showing a message indicator in accordance with the present invention;
Fig. 5 is a view showing another message indicator in accordance with the present invention; and Fig. 6 is a flowchart for describing the operation of the infusion device in accordance with the present invention.
Referring to Fig. 1 showing the entire construction of an infusion device according to an embodiment of the present invention, an infusion drive means 4 operates to infuse a drip infusion contained in a solution container 1 into the human body 3 through a tube 2. A sensor 5 which functions to detect a tube occlusion, is mounted on the tube 2 in contact therewith, on the . ~
~. .f .
downstream side of the infusion drive means 4. The tube 2 is made of an elastic material so that the outer diameter varies according to the change in the internal pressure thereof. The sensor 5 positioned in contact with the tube 2 detects the change in the outer diameter of the tube 2 to find the change in the tube internal pressure. As shown in Fig. 2, the sensor 5 is one whose signal output varies linearly in response to a change in the outer diameter of the tube 2. In Fig. 2, reference numeral RO denotes the outer diameter of the tube 2 in a normal condition and R1 denotes the outer diameter thereof detected by the sensor 5 when the diameter thereof has expanded as a result of a tube occlusion which has occurred in the downstream side thereof.
The sensor 5 is selected from a semiconductor sensor, a core-equipped coil sensor, a force displacement transducer, a distortion gauge or the like, provided that the resistance value, electric current value, voltage, or oscillation frequency value change linearly.
The sensor 5 is connected to a microcomputer 6, thus continuously outputting data indicative of the change of the internal pressure of the tube 2 to the microcomputer 6. A message indicator 7 as shown in Fig. 3 is connected with the microcomputer 6, and in response to an instruction signal outputted from the microcomputer 6, displays the internal pressure of the tube 2 as information that is easy for a nurse or hospital staff to observe. The microcomputer 6 is connected to a motor (not shown) for driving the infusion drive means 4, thus controlling the infusion drive means 4 so as to stop its operation when the internal pressure of the tube 2 exceeds a predetermined value. Reference numerals 8, 9, and 10 denote interfaces connected between the microcomputer 6 and the sensor 5, between the microcomputer 6 and the message indicator 7, between the microcomputer 6 and the infusion drive means 4, respectively.
As shown in Fig. 3, the message indicator 7 has a plurality of alphanumeric display elements (ten display elements 11 in the embodiment) shown disposed in two rows, an upper and lower row, for displaying alarm information.
The display elements 11 in the upper row (A) are used to display a plurality of warning message in, for instance the English language. More specifically, as segments 12 of the display elements 11 in the upper row (A) are energized, (as indicated in solid black) these segments 12 illuminate in the pattern of "FLOW CHECK". In the lower row (B), the internal pressure of the tube 2 is displayed by the segments 12 in the upper half of the display elements 11 and the lowermost line of horizontal bar segments 12a are used to display the internal pressure of the tube 2 in the form of a bar graph. Thus, in the example illustrated, in the lower row (B), the upper half segments 12 display the internal pressure of the tube 2 as "NORM OCC" (normal occlusion) which means that the internal pressure of the tube 2 has not reached the occlusion deciding value and the bar segments 12a in the lowermost line are sequentially energized from left to right in proportion to the present value of the internal pressure of the tube 2. In Fig. 3, all the bar segments 12a are energized, which means that the internal pressure of the tube 2 is sufficiently high that occlusion of the tube 2 is imminent.
When the infusion drive means 4 is stopped based on a decision that the tube 2 has been occluded, the message indicator 7 displays "OCCLUSION" as shown in Fig.
4.
In the message indicator 7, the internal pressure of the tube 2 is not only displayed by the alphanumeric display elements 11 as a text display but also displayed as a bar graph by utilizing some segments of the alphanumeric display elements 11. Thus, the user such as a nurse or hospital staff can easily know the quantitative change in the internal pressure of the tube 2 from the bar graph display.
The method for displaying the internal pressure of the tube 2 is not limited to the above-described embodiment. The following display methods can also be carried out: The upper half of the lower row (B) can be used to digitally display the internal pressure of the tube 2 instead of a text message. The upper row (A) can be used to display the internal pressure of the tube 2 in text display and the lower row (B) can be utilized for a bar graph display. In the above-described embodiment, the internal pressure of the tube 2 which can be displayed in two rows, however, may be displayed in only one row. The one row may be so arranged that by switching the display modes sequentially, so that, for instance a display in the English language appears first and, then, a digital display appears, thereafter a bar graph display appears. Instead of the alphanumeric display elements 11, numerical display elements 11' each comprising seven segments 12' as shown in Fig. 5 may be used. According to this display method, if two rows are provided, the upper row is used to make a digital display and the lower row is used to make a bar graph display. If only one row is provided, first, the internal pressure of the tube 2 is digitally displayed, then, displayed by a bar graph display.
Signals outputted from the sensor 5 are processed by the microcomputer 6 based on the flowchart of Fig. 6.
According to the instruction of the microcomputer 6, the segments 12 of the display elements 11 are energized or deenergized. The operation of the device according to one embodiment is described with reference to the flowchart of Fig. 6.
The delivery of an infusion fluid is started by the start of the motor operating the infusion drive means 4. The fluid is supplied from the solution container 1 to the human body 3 through the tube 2. The pressure of fluid ~A.
` 20155S9 flowing through the tube 2 is sampled by the sensor 5 every predetermined period of time and data indicative of the sampled value is outputted to the microcomputer 6. If the difference (X) obtained by subtracting the sampled value from a predetermined tube occlusion detecting reference value stored in the memory of the microcomputer 6 is positive, i.e., if the occlusion detection pressure is greater than the sample pressure, it is decided that the tube 2 is not occluded and the internal pressure of the tube 2 is detected according to the difference (X) and displayed by the message indicator 7. That, is, if the difference (X) is large, it is decided that the internal pressure of the tube 2 is small, so that only the bar segment 12a positioned on the left side is energized. The remaining bar segments 12a are sequentially energized one by one with the reduction of the difference (X).
Thus, the user such as the nurse observing a patient being infused is easily capable of monitoring the quantitative change in the internal pressure of the tube 2 according to the increase or decrease of the length of the bar display. Accordingly, if the bar display rapidly elongates, i.e., if the internal pressure of the tube 2 rapidly increases, the nurse can see that the patient's turning in bed has caused the tube 2 to be occluded. Thus, the nurse can remove the cause and return the increased internal pressure of the tube 2 to a normal pressure.
If the difference X is negative, that is, if the sampled pressure is greater than the predetermined occlusion detecting reference pressure, it is decided that the tube 2 has been occluded. When the tube 2 is occluded, simultaneously with the display of "OCCLUSION" displayed on the message indicator 7, the microcomputer 6 gives an instruction to stop the motor driving the infusion drive means 4.
As described above, in the message indicator for displaying the tube internal pressure, segments of the ,.
alphanumeric or numeric display element are used to display the internal pressure of the tube by means of a bar graph.
Therefore, the length of the bar display allows the user such as a nurse or the hospital staff to readily identify the quantitative change of the internal pressure of the tube. That is, the user can find whether or not the tube is being occluded. Further, an alarm sounds when the tube is occluding, so that the user can remove the cause of the occlusion and restore the tube-occluded condition to a normal condition before the delivery of the infusion fluid is stopped.
Although the present invention has been fully described in connection with the preferred embodiments thereof with reference to the accompanying drawings, it is lS to be noted that various changes and modifications are apparent to those skilled in the art. Such changes and modifications are to be understood as being included within the scope of the present invention as defined by the appended claims unless they depart therefrom.
Claims (4)
1. A display device for indicating the internal pressure of a tube of an infusion device having an infusion drive means for supplying an infusion fluid from a solution container to a human body through the tube and a sensor for detecting the internal pressure of the tube, the display device comprising a message indicator for displaying the internal pressure of the tube detected by the sensor;
the message indicator comprising a plurality of multi-segmented alphanumeric display elements arranged in a first and second row, the display elements of the first row being controlled to display alarm information;
the segments of the upper half of the display elements of the second row being controlled to display textually the internal pressure of the tube; and the segments of the lower half of the display elements of the second row defining a bar graph for graphically displaying the internal pressure of the tube.
the message indicator comprising a plurality of multi-segmented alphanumeric display elements arranged in a first and second row, the display elements of the first row being controlled to display alarm information;
the segments of the upper half of the display elements of the second row being controlled to display textually the internal pressure of the tube; and the segments of the lower half of the display elements of the second row defining a bar graph for graphically displaying the internal pressure of the tube.
2. A display device as claimed in claim 1, wherein said sensor, said message indicator, and said infusion drive means are connected to a microcomputer, and said microcomputer is adapted to compare pressure data inputted thereto from said sensor with predetermined tube occlusion detecting reference pressure data so as to determine whether or not the internal pressure of the tube is greater than the predetermined tube occlusion detecting reference pressure and outputs an instruction to said message indicator so that the display elements thereof display its determination; and said microcomputer further adapted to provide an operation-stop instruction to said infusion drive means when the internal pressure of the tube has reached the tube occlusion detecting reference pressure.
3. A device as claimed in claim 1, wherein said message indicator comprises alphanumeric display elements arranged in one row, said message indicator sequentially carries out a textual display, then a digital display, and thereafter displaying a bar graph.
4. A display device for indicating the internal pressure of a tube of an infusion device having an infusion drive means for supplying an infusion fluid from a solution container to a human body through the tube and a sensor for detecting the internal pressure of the tube, said display device comprising:
a microcomputer for comparing pressure data inputted thereto from said sensor with predetermined reference data, determining if the internal pressure of the tube is greater than the reference data and, for outputting an instruction to said message indicator for displaying a result of said determination;
a message indicator comprising a plurality of multi-segmented alphanumeric display elements arranged in a first and second row, the display elements of the first row being controlled to display determinations outputted from said microcomputer, the segments of the upper half of the display elements of the second row being controlled to display textually the internal pressure of the tube; and the segments of the lower half of the display elements of the second row defining a bar graph for graphically displaying changes in the internal pressure of the tube;
and wherein said microcomputer is further capable of transmitting an operation-stop instruction to said infusion drive means if the internal pressure of said tube reaches the predetermined reference pressure.
a microcomputer for comparing pressure data inputted thereto from said sensor with predetermined reference data, determining if the internal pressure of the tube is greater than the reference data and, for outputting an instruction to said message indicator for displaying a result of said determination;
a message indicator comprising a plurality of multi-segmented alphanumeric display elements arranged in a first and second row, the display elements of the first row being controlled to display determinations outputted from said microcomputer, the segments of the upper half of the display elements of the second row being controlled to display textually the internal pressure of the tube; and the segments of the lower half of the display elements of the second row defining a bar graph for graphically displaying changes in the internal pressure of the tube;
and wherein said microcomputer is further capable of transmitting an operation-stop instruction to said infusion drive means if the internal pressure of said tube reaches the predetermined reference pressure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPU.M.1-50547 | 1989-04-28 | ||
| JP1989050547U JPH061151Y2 (en) | 1989-04-28 | 1989-04-28 | Tube internal pressure display device for infusion pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2015559A1 CA2015559A1 (en) | 1990-10-28 |
| CA2015559C true CA2015559C (en) | 1997-06-10 |
Family
ID=12862037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002015559A Expired - Lifetime CA2015559C (en) | 1989-04-28 | 1990-04-26 | Display device for indicating the internal pressure of the tube of an infusion pump |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5276610A (en) |
| EP (1) | EP0394973B1 (en) |
| JP (1) | JPH061151Y2 (en) |
| CA (1) | CA2015559C (en) |
| DE (1) | DE69002675T2 (en) |
Families Citing this family (53)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE35501E (en) * | 1991-06-25 | 1997-05-06 | Medication Delivery Devices | Infusion pump, treatment fluid bag therefor, and method for the use thereof |
| US5207645A (en) * | 1991-06-25 | 1993-05-04 | Medication Delivery Devices | Infusion pump, treatment fluid bag therefor, and method for the use thereof |
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-
1989
- 1989-04-28 JP JP1989050547U patent/JPH061151Y2/en not_active Expired - Lifetime
-
1990
- 1990-04-24 DE DE90107786T patent/DE69002675T2/en not_active Expired - Lifetime
- 1990-04-24 EP EP90107786A patent/EP0394973B1/en not_active Expired - Lifetime
- 1990-04-24 US US07/513,883 patent/US5276610A/en not_active Expired - Lifetime
- 1990-04-26 CA CA002015559A patent/CA2015559C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH061151Y2 (en) | 1994-01-12 |
| DE69002675D1 (en) | 1993-09-16 |
| EP0394973B1 (en) | 1993-08-11 |
| EP0394973A1 (en) | 1990-10-31 |
| JPH02141457U (en) | 1990-11-28 |
| CA2015559A1 (en) | 1990-10-28 |
| US5276610A (en) | 1994-01-04 |
| DE69002675T2 (en) | 1994-03-17 |
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