CN114487390A - Detection box and detection system for detecting liquid flow in medical diversion device - Google Patents
Detection box and detection system for detecting liquid flow in medical diversion device Download PDFInfo
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- CN114487390A CN114487390A CN202210112993.6A CN202210112993A CN114487390A CN 114487390 A CN114487390 A CN 114487390A CN 202210112993 A CN202210112993 A CN 202210112993A CN 114487390 A CN114487390 A CN 114487390A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/558—Immunoassay; Biospecific binding assay; Materials therefor using diffusion or migration of antigen or antibody
Abstract
The invention discloses a detection box and a detection system for detecting liquid flow in a medical diversion device. The engaging surfaces of the two case portions have respective local recessed shapes which, in the engaged state, together form a channel adapted to hold a catheter and a hollow space for receiving and holding a fluid sensing device, wherein one of the case portions is provided at its recessed portion with an electrical contact for electrical connection to the fluid sensing device for obtaining an electrical signal from the fluid sensing device. The invention helps to improve the reliability and robustness of detection of fluid flow in complex environments of clinical medicine, and to make the operations required to perform such detection more convenient and efficient.
Description
Technical Field
The present disclosure relates to the field of medical technology, and in particular, to a detection method for detecting a liquid (e.g., a body fluid) flowing in a medical flow guiding device, and more particularly, to a detection box and a detection system for detecting a liquid flowing in a medical flow guiding device.
Background
In clinical medicine, various fluid diversion devices, such as some devices that direct the flow of a patient's body fluids or the drainage of the body, are widely used. For example, a typical such flow guiding device is a urinary catheter, which generally comprises a urinary catheter and a urine collecting bag, wherein the two ends of the urinary catheter (which may be referred to as the patient end and the collecting end) are respectively connected with a catheter indwelling in the patient and the urine collecting bag.
A great demand for such devices in clinical use is that parameters of the fluid flow in these fluid conducting devices, such as flow rate, etc., often have important reference values for patient condition and treatment, and determination of medical treatment plan, etc., and therefore, detection of these fluid flow parameters is required for monitoring, recording, observing, and analyzing relevant data based on such detection.
However, in the more complex clinical environment of a hospital, the prior art has not provided a satisfactory solution that enables accurate and reliable detection of such fluid flow parameters while avoiding inconvenience or additional risk to the patient, physician, nurse.
For example, most of the solutions known today use weighing to detect the liquid flow of the deflector. However, disadvantages of this type of solution include the following: the weight measurement based detection device can only be attached near the container at the liquid collection end of the deflector, such as a urine collection bag, and the detection device and the container containing the liquid need to be kept in a relatively fixed position and avoid contact with other surrounding equipment to meet the requirement of accurate weight measurement; in the working process of the detection device, if a patient or medical personnel nearby touches and moves the detection device or the liquid container, the detection data are affected; when, for example, a urine collection bag is replaced, care needs to be taken to manually record the data; the real-time performance of the detected data is poor, and the accumulated value in a certain longer time period can be obtained usually; before the detection device is arranged for detection every time, the preparation operation for installing the detection device in place is relatively complicated and inconvenient.
Furthermore, the known detection devices may have the following disadvantages: the detection device is provided with a connecting line, so that the operation is inconvenient, the movement of a patient is hindered, and the like; some detection devices are relatively bulky, further occupying limited clinical space; some detection devices have higher requirements on the static fixation of the self position, so that the detection can be completed more accurately only by fixing the detection devices on a component of a sickbed through a bracket additionally; low detection accuracy, etc.
Accordingly, there is a need to provide a new detection device for detecting liquid flow in a medical flow guiding device to at least partially alleviate or solve the above mentioned problems and drawbacks of the existing solutions.
Disclosure of Invention
An object of the present disclosure is to overcome at least some of the above-mentioned drawbacks of the existing solutions or detection devices for detecting a liquid flow in a medical drainage device, and to provide a cassette for detecting a liquid flow in a medical drainage device and a detection system comprising the cassette.
The present disclosure provides a test cassette for detecting liquid flow in a medical flow-through device having a conduit through which liquid flows, wherein a fluid sensing device is disposed in the conduit and is configured to sense liquid flow in the conduit and generate a corresponding electrical signal based on the liquid flow;
the cartridge includes first and second cartridge parts having an engaging surface and a set of magnetic attraction means, respectively, configured to be attracted to each other so that the first and second cartridge parts are engaged with each other via the engaging surface and are attracted as a unit;
wherein the engagement surfaces of the first and second base members each have a partially concave shape comprising a groove extending between opposite sides of the engagement surface and a concave portion between opposite ends of the groove, and wherein the grooves of the first and second base members together form a channel adapted to retain the conduit when the first and second base members are drawn together, and the concave portions of the first and second base members together form a hollow space for receiving and retaining the fluid sensing device;
wherein one of the first and second cartridge body portions is provided with an electrical contact at a recess thereof for electrical connection to the fluid sensing device for obtaining the electrical signal from the fluid sensing device.
The present disclosure is based on the technical insight that by a combination of a test cartridge comprising two cartridge body parts as described above and a fluid sensing means adapted to be arranged in and communicating with a catheter, a test device can be provided which differs significantly in several respects from the prior art solutions, which test device can be attached to a medical catheter to each other and enables a test for a liquid flow without the need to place the test device near the liquid collecting end of the flow guiding means and having a stationary fixed position with respect to the container for collecting the liquid. This may provide significant flexibility in the design, location, and preparation required to perform the testing of the device for the flow of fluid in the medical flow guide.
Also, unlike the conventional designs of such test devices, such test cartridges are designed to be mounted with respect to a conduit that is typically flexible and easily moved, which, due to its flexible nature, would typically be considered unsuitable for mounting or attachment of additional devices. A typical example of such a flexible catheter is a medical catheter, such as a urinary catheter, used in clinical medicine for guiding the outflow of a patient's bodily fluids.
It will be appreciated that the fluid sensing device as described above may be or be provided with various types of sensors that are already available and are capable of sensing the flow of liquid, sensing the flow of liquid flowing therethrough and generating a corresponding electrical signal based on the flow of liquid, and that the cartridge, upon acquiring the electrical signal, may be scaled to derive a parameter indicative of the flow of liquid based on the electrical signal.
One example of a fluid sensing device is a liquid pressure sensing device configured to sense a pressure differential between an inflow pressure and an outflow pressure of a liquid flowing therethrough and generate a corresponding electrical signal based on the pressure differential. More specifically, it may be, for example, a sensing device with an existing MEMS micro-flow sensor chip.
It will also be appreciated that the fluid pressure sensing device or sensor will typically have a different profile and/or cross-sectional shape than the conduit, and that the cartridge design of the present disclosure will have a recess to create a hollow space for receiving and holding the fluid pressure sensing device or sensor when the two cartridge body portions are engaged, thereby preventing relative movement between the cartridge and the conduit when the cartridge is attached to the fluid sensing device and the corresponding conduit portion.
The reliable attachment of the cassette to the fluid sensing device and corresponding conduit portion as described above, and the transmission of signals between the cassette portion and the fluid pressure sensing device via electrical contacts, provides a highly reliable and robust test. That is, the transmission of the detection and detection signals will not be affected in any way, for example, even if the surrounding person or device accidentally touches or moves the cartridge or the conduit, as long as it does not disengage the two cartridge parts from the attractive force.
According to some embodiments of the present disclosure, the first and second box portions are configured as two members separate from each other. That is, the two members are integrated only when the two sets of magnetic attracting means approach each other and attract each other.
According to another embodiment of the present disclosure, the first and second box portions are configured to be connected to each other via a pivot axis, wherein the first box portion is rotatable relative to the second box portion about said pivot axis by at least 90 °.
According to some embodiments of the present disclosure, the fluid sensing device has a first electrical contact and a second electrical contact, one of the first and second cartridge portions has a power supply device, and is provided with a third electrical contact corresponding to the first electrical contact and a fourth electrical contact corresponding to the second electrical contact in a recess thereof, the third electrical contact being electrically connected to the power supply device;
wherein the third and fourth electrical contacts are configured to contact the first and second electrical contacts, respectively, in a pull-in state of the first and second base members.
According to some embodiments of the present disclosure, the third and fourth electrical contacts are connected to the recess via an elastic member configured to apply a pushing force to the third and fourth electrical contacts away from a surface of the recess in a pull-in state of the first and second base member parts.
In this manner, the resilient member may be utilized to provide a tighter press fit between the electrical contacts to ensure reliable contact and electrical connection between the electrical contacts.
According to some embodiments of the present disclosure, one of the first and second cartridge portions further has a temperature sensor disposed within the recess for contacting a conduit received therein and detecting a temperature of the conduit;
the processing unit is preset with a flow calculation algorithm, the flow calculation algorithm comprises different flow speed-pressure difference functions respectively corresponding to a plurality of temperature intervals, and the processing unit is configured to be capable of receiving the pressure difference and the temperature acquired by the liquid pressure sensing device and the temperature sensor and calculating the liquid flow speed and/or the liquid flow rate of the liquid pressure sensing device according to the received temperature and by adopting the corresponding flow speed-pressure difference functions according to different temperature intervals.
This embodiment is based on the technical insight that by the divided arrangement of the temperature intervals, both a higher accuracy of the calculation of the liquid flow rate and flow rate can be achieved and the associated calculation is not made too complex to put higher performance requirements on the processing unit.
The present disclosure also provides a detection system for detecting liquid flow in a medical flow-through device, comprising a cartridge having some or all of the various features as described above, and the fluid sensing device, both attached to each other as described above, when performing a detection.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain preferred examples of the disclosure.
The positive progress effects of the disclosure are as follows:
the cassette for detecting fluid flow in a medical flow-through device and the detection system comprising the cassette according to the present disclosure, through the combination of the cassette having two cassette body parts and the fluid sensing device adapted to be disposed in and communicate with a catheter, provides a different solution to existing detection devices, which solution helps to improve the reliability and robustness of detection of fluid flow in the complex environment of clinical medicine, and to make the operations required to perform such detection more convenient and efficient.
Drawings
Fig. 1 schematically shows a perspective view of a cassette for detecting liquid flow in a medical diversion device according to a preferred embodiment of the present disclosure.
FIG. 2 schematically shows a front view of the cartridge according to a preferred embodiment of the present disclosure.
FIG. 3 schematically shows a schematic view of a cartridge according to a preferred embodiment of the present disclosure, as viewed in the direction in which the catheter extends.
FIG. 4 schematically shows one of the two cartridge body portions of the cartridge, and a portion of the conduit provided with the fluid sensing device, according to a preferred embodiment of the present disclosure.
Description of reference numerals:
1: the first box body part
2: second box part
3: catheter tube
4: fluid sensing device
5: temperature sensor
11: joining surfaces
12: groove
21: joining surfaces
22: groove
23: concave part
24: magnetic attraction device
25: display screen
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided in connection with the accompanying drawings, and the following description is intended to be illustrative, and not restrictive, and any other similar cases may fall within the scope of the present invention.
In the following detailed description, directional terms, such as "left", "right", "upper", "lower", "front", "rear", and the like, are used with reference to the orientation as illustrated in the drawings. Components of embodiments of the present invention can be positioned in a number of different orientations and the directional terminology is used for purposes of illustration and is in no way limiting.
From the above description and the following more detailed exemplary description of a test cartridge according to a preferred embodiment of the present disclosure, those skilled in the art will appreciate that the present disclosure is applicable to testing fluid flow in a medical flow-through device, particularly in relatively complex and limited applications such as clinical medicine, and has various advantages.
Fig. 1-3 schematically illustrate a cassette for detecting liquid flow in a medical flow guiding device, a fluid sensing device and a portion of a catheter provided with a fluid sensing device according to a preferred embodiment of the present disclosure.
Also, in order to more clearly show the engaging surface of the case portion of the cartridge and its surface shape with the groove and the recess, one of the two case portions of the cartridge is removed in FIG. 4. It will be appreciated that the other cassette part removed in fig. 4 may be of substantially the same or symmetrical design as the one shown in fig. 4, in terms of the engagement surface and its surface shape with the grooves and recesses.
As shown in fig. 1-4, a fluid sensing device 4 is disposed in conduit 3 and is configured to sense a liquid flow in conduit 3 and generate a corresponding electrical signal based on the liquid flow. It will be appreciated that the present disclosure is not limited to the manner in which the fluid sensing device 4 is mounted with respect to the conduit 3, as long as the fluid sensing device 4 is disposed in a section of a fluid line such that fluid in the line will flow past the fluid sensing device 4.
Today, since there are already in the art fluid sensing devices 4 that are capable of such measurements and are cost-effective, it is fully feasible and not at significant high cost to pre-configure or integrate such fluid sensing devices 4 in the medical field in the relevant medical catheter products. An example of the fluid sensor device 4 will be described below.
According to a preferred embodiment of the present disclosure, referring to FIGS. 1-4, the cartridge includes a first housing portion 1 and a second housing portion 2, the first housing portion 1 and the second housing portion 2 having an engagement surface 11, 21 and a set of magnetic attraction means 24 (each shown as a magnetic attraction point), respectively, the two sets of magnetic attraction means 24 being configured to attract each other such that the first housing portion 1 and the second housing portion 2 are attracted together via the engagement surface 11, 21.
Wherein the engaging surfaces 11, 21 of the first and second housing parts 1, 2 respectively have a partially recessed shape comprising a groove 12, 22 extending between opposite sides of the engaging surfaces 11, 21 and a recess between two ends of the groove 12, 22, and wherein the grooves 12, 22 of the first and second housing parts 1, 2 together form a channel adapted to hold the conduit 3 when the two housing parts are drawn together, and the recesses of the two together form a hollow space for receiving and holding the fluid sensor means 4.
Wherein one of the first and second housing parts 1, 2 is provided with electrical contacts (not shown) in its recess 23 for electrical connection to the fluid sensor device 4 for obtaining the electrical signals described above from the fluid sensor device 4.
Based on the perspective of fig. 1-4, the first base member 1 and the second base member 2 may be considered to constitute the upper and lower portions of the case or the upper lid and the main body portion, respectively. It should be understood, however, that the illustrated size, location and shape of the two cartridge portions is not intended to limit the scope of the present disclosure, but is merely an example.
As can be readily seen with reference to Figs. 1-4, the detection device according to this embodiment may be attached to the portion of the medical catheter 3 provided with the fluid sensing device 4 by engagement of both the first and second housing parts 1, 2, and the particular location of attachment may be independent of the collection end of the fluid line, such as a urine collection bag, or the storage container. Thus, even the collection end or reservoir of the fluid line is not shown in FIGS. 1-4, as the relative positions of the cassette and the collection end or reservoir do not have any effect on the operation of the cassette required to detect parameters of fluid flow in a conduit.
This feature is quite different from the prior art as described in the foregoing of the present disclosure and provides significant flexibility in the design, location, and preparation required to perform the testing of the fluid flow in the medical flow guide.
More specifically, for example, after preparing a patient for urination and positioning the entire urination line and urine collection bag, the nurse need only locate the tube portion in which the fluid sensor device 4 is located and then align and draw together the two sets of magnetic attachment devices 24 of both the first and second housing portions 1 and 2 to complete all of the preparation required for the test.
Also, since the channel formed by the grooves 12, 22 of the first and second base members 1, 2 together necessarily holds the conduit 3 therein and the hollow space formed by the recesses 23 of the two together necessarily accommodates and secures the fluid sensor device 4 therein when the first and second base members 1, 2 are manipulated to be drawn into one body with each other, the operator will not have to worry about any inadvertent manipulation. Because if the conduit 3 or the fluid sensor means 4 is not in the correct position, the attracting action of the first and second housing parts 1, 2 by the magnetic attraction will not occur and it is almost impossible for any operator to ignore.
It will also be appreciated that one advantage of using magnetic attraction to manipulate both the first base member portion 1 and the second base member portion 2 into engagement with each other in the manner described above is that this allows the preparation or priming action for the operator to set the cassette in place to be the simplest, which is particularly advantageous in the crowded and noisy environment of most hospital wards and helps to avoid any risk of mishandling. In addition, the design also makes the detection box very convenient for installation and disassembly in repeated use.
Further, such a cartridge as described above can be mostly manufactured using a lightweight material, and can be manufactured to have a small size so as to save a space occupied by it due to the installation manner and principle of attachment to the conduit 3 and the fluid sensor device 4 as described above and the simple configuration of the cartridge itself. Meanwhile, in such mounting, the catheter can be regarded as a carrier or carriage for carrying or hanging the cartridge, and thus there is no need to additionally provide a holder for mounting the cartridge.
Similarly, once the first and second base members 1 and 2 are drawn together, relative movement between the testing cartridge and the conduit 3 or fluid sensing device 4 will generally not occur unless sufficient force is accidentally applied by a surrounding person or device to disengage the two base members 1 and 2 against the magnetic attraction. Therefore, the detection of the fluid in the pipeline by using the detection box has strong robustness, and the detection is hardly influenced by accidental touch of surrounding people or equipment.
It will be appreciated that the recess 23 may be adapted to the shape of the fluid sensing device 4, for example in the illustrated example, each having a generally rectangular plan shape. Since the fluid sensing device 4 will typically have a shape or cross-sectional shape that does not conform to the conduit, the matching shapes of both the recess 23 and the fluid sensing device 4 help to prevent any movement of the cartridge relative to the conduit 3 or the fluid sensing device 4. It will also be appreciated that the present disclosure is not limited to the fluid sensing device 4 having a particular shape.
According to some preferred embodiments of the present disclosure, the partially concave shape of the first and second cassette parts 1, 2 may be substantially symmetrical, primarily considering that flexible medical tubing typically has a circular cross-section, and this symmetrical design on the one hand facilitates easier pressing of the tubing 3 into alignment with the grooves 12, 22 by the operator when the two cassette parts are brought into engagement with each other, and on the other hand also helps to avoid inadvertently forcing the grooves 12, 22 of the cassette parts against the tubing 3 during operation, thereby blocking or restricting the flow of fluid within the tubing 3.
According to some preferred embodiments of the present disclosure, the grooves 12, 22 may employ a non-smooth surface to assist in preventing relative sliding of the catheter 3 in the direction of extension of the grooves, although such sliding may have been limited to a minimal extent, as previously described.
In the embodiment shown in fig. 1-3, the first base member 1 and the second base member 2 are constructed as two members separated from each other. Thus, the two housing portions are only brought together when the two sets of magnetic attraction means 24 are brought close to each other and attracted to each other.
Although not shown in the drawings, according to an alternative embodiment of the present disclosure, the first case portion 1 and the second case portion 2 may also be configured to be connected to each other via a pivot axis about which the first case portion 1 can rotate at least 90 ° relative to the second case portion 2. Wherein the magnetic attracting means 24 may be arranged only at a side relatively far from the pivot axis, which may in particular be e.g. a hinge mechanism arranged along one long side of the engaging surface 11, 21 of the first case part 1.
According to some preferred embodiments of the present disclosure, the fluid sensing device 4 has a first electrical contact and a second electrical contact, one of the first and second case portions 1 and 2 has a power supply device (e.g., a battery), and is provided with a third electrical contact corresponding to the first electrical contact and a fourth electrical contact corresponding to the second electrical contact in the recess 23 thereof, the third electrical contact being electrically connected to the power supply device. Wherein the third and fourth electrical contacts are configured to contact the first and second electrical contacts, respectively, in a pull-in state of the first and second base members 1 and 2. Typically, the first electrical contact and the third electrical contact for supplying power to the fluid sensing device 4 may be two electrical contacts, respectively.
It will be appreciated that the electrical contacts described herein in this disclosure are intended to provide a reliable electrical connection in the engaged state of the first and second base members 1, 2, thus requiring only the pair of electrical contacts to be contacted and connected to be disposed in corresponding positions.
It is further preferred that the third and fourth electrical contacts are connected to the recess 23 via an elastic member configured to apply an urging force to the third and fourth electrical contacts away from the surface of the recess 23 in the attraction state of the first and second base members 1 and 2. Thus, close pressing and contact between the electrical contacts can be further ensured by the elastic member, which will help to maintain reliability thereof in long-term use of the cartridge.
According to some preferred embodiments of the present disclosure, the fluid sensing device 4 is a liquid pressure sensing device configured to sense a pressure difference between an inflow pressure and an outflow pressure of a liquid flowing therethrough and generate a corresponding electrical signal based on the pressure difference. For example, the fluid sensing device 4 may comprise a channel portion and a fluid sensor chip as shown in fig. 4, which may be, for example, an existing MEMS micro-fluidic sensor chip.
Of course, it is understood that the fluid sensor device 4 as described above may be or be provided with various types of sensors that are already available to sense the flow of liquid, and is not limited to the MEMS micro-fluidic sensor chip exemplified above.
On the basis of the above-described embodiment using the liquid pressure sensing means, it is further preferable that one of the first case portion 1 and the second case portion 2 further has a temperature sensor 5 (e.g., a temperature probe) and a processing unit, the temperature sensor 5 being disposed in the recess 22 for contacting the conduit 3 accommodated therein and detecting the temperature of the conduit 3, thereby enabling temperature measurement of the liquid flowing in the conduit 3.
Still further preferably, an elastic member connected to the temperature sensor 5, similar to the elastic member mentioned in the foregoing description about the electrical contact, may be further arranged, which applies an elastic force (an upward elastic force as in fig. 3-4) to the temperature sensor 5 (e.g., the microprobe) so that the temperature sensor disposed in the groove 22 can be brought into close contact with the conduit 3 to more reliably measure the temperature of the conduit 3.
Wherein the processing unit is preset with a flow calculation algorithm comprising different flow rate-pressure difference functions corresponding to a plurality of temperature intervals, respectively, the processing unit is configured to be able to receive the pressure difference and the temperature acquired from the liquid pressure sensing device and the temperature sensor 5, and to calculate the liquid flow rate and/or the liquid flow rate through the liquid pressure sensing device according to the received temperature against the different temperature intervals using the corresponding flow rate-pressure difference functions. Wherein the processing unit is electrically connectable to the fourth electrical contact and to the temperature sensor 5 for acquiring a temperature value detected by the temperature sensor 5 and for acquiring the electrical signal as described hereinbefore.
Further preferably, the flow rate-pressure difference function is v ═ AX3+BX2+ CX + D, where v is the flow rate, x is the pressure difference, the coefficient A, B, C, D is a constant preset for each temperature interval, the processing unit is configured to select the corresponding coefficient value and calculate the liquid flow rate according to the temperature interval to which the temperature sensor 5 detects the temperature.
The inventor of the present application has determined based on some tests that one disadvantage of using the same flow rate-pressure difference function to measure the flow rate is that if the temperature changes significantly, the flow rate calculation results deviate to some extent. Based on this, the above embodiment can make the calculated flow rate and flow rate of the liquid have higher accuracy on the premise that the calculation is still relatively simple by setting the flow rate-pressure difference function and the coefficient values thereof in different temperature intervals. One advantage of the relatively simple operation is that the processing unit built into the detection box can be implemented by using low-cost hardware, such as a single chip microcomputer.
According to some preferred embodiments of the present disclosure, one of the first and second cassette parts 1, 2 is further arranged with a display unit configured to be able to receive the liquid flow rate and/or liquid flow from the processing unit and to display the result on a display screen 25. This can provide the patient or healthcare worker with an easily observable flow rate/flow monitoring data, such as total flow over the past hour or cumulative flow over the past 24 hours.
Further preferably, the display unit and the display screen 25 may be further configured to be able to start operating in response to the aforementioned contact conduction of both the third electrical contact and the first electrical contact. Thus, the display screen 25 is turned on only when the sensing means and the cartridge are attached to each other in a proper manner, so that the user can be reminded by the display of the display unit whether the cartridge has been mounted in place.
According to some preferred embodiments of the present disclosure, one of the first and second cartridge parts 1, 2 is further arranged with a wireless communication unit configured to be able to communicate with a Hospital Information System (collectively referred to as Hospital Information System) for uploading locally calculated liquid flow rate and/or liquid flow volume to the Hospital Information System.
According to some preferred embodiments of the present disclosure, as shown with reference to FIGS. 1-4, each corner of the cassette has an arcuate chamfer. This configuration can prevent the corners of the test cassette from scratching the user or damaging the flexible conduit 3.
There is also provided in accordance with some preferred embodiments of the present disclosure a detection system for detecting liquid flow in a medical flow-through device, the detection system comprising any of the detection cartridges described above and a fluid sensing device 4 disposed in a conduit 3. It can be understood that, in order to more fully utilize the real-time liquid flow parameters that the detection box described above can acquire, the detection system may further be provided with an upper computer connected with the detection box in a wireless communication manner, and the upper computer may remotely acquire the local real-time data of the detection box and perform further data analysis, storage, summarization or analysis.
The detection box and the detection system according to the above embodiments of the present disclosure help to improve the reliability and robustness of detection of liquid flow in the complex environment of clinical medicine, and to make the operation required for performing such detection more convenient and efficient. Movement, motion or touching of the test cassette, catheter by the patient or healthcare worker during the testing process does not affect the testing fluid parameters and also allows for replacement of collection end receptacles such as urine collection bags without interrupting the testing.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (12)
1. A cassette for detecting fluid flow in a medical flow directing device, the flow directing device having a conduit for fluid flow therethrough, wherein a fluid sensing device is disposed in the conduit and is configured to sense fluid flow in the conduit and generate a corresponding electrical signal based on the fluid flow;
the cartridge includes first and second cartridge parts having an engaging surface and a set of magnetic attraction means, respectively, configured to be attracted to each other so that the first and second cartridge parts are engaged with each other via the engaging surface and are attracted as a unit;
wherein the engagement surfaces of the first and second base members each have a partially concave shape comprising a groove extending between opposite sides of the engagement surface and a concave portion between opposite ends of the groove, and wherein the grooves of the first and second base members together form a channel adapted to retain the conduit when the first and second base members are drawn together, and the concave portions of the first and second base members together form a hollow space for receiving and retaining the fluid sensing device;
wherein one of the first and second cartridge body portions is provided with an electrical contact at a recess thereof for electrical connection to the fluid sensing device for obtaining the electrical signal from the fluid sensing device.
2. The cassette of claim 1, wherein the first and second housing portions are constructed as two separate members.
3. The cassette of claim 1, wherein the first and second housing portions are configured to be coupled to each other via a pivot axis, wherein the first housing portion is rotatable relative to the second housing portion about the pivot axis by at least 90 °.
4. The testing cassette of claim 1, wherein the fluid sensing device has first and second electrical contacts, one of the first and second housing portions has a power supply device, and a recess thereof is provided with a third electrical contact corresponding to the first electrical contact and a fourth electrical contact corresponding to the second electrical contact, the third electrical contact being electrically connected to the power supply device;
wherein the third and fourth electrical contacts are configured to contact the first and second electrical contacts, respectively, in a pull-in state of the first and second base members.
5. The testing cassette of claim 4, wherein the third and fourth electrical contacts are connected to the recess via an elastic member, the elastic member being configured to apply a pushing force to the third and fourth electrical contacts away from the surface of the recess in the engaged state of the first and second housing parts.
6. The cassette of any of claims 1-5, wherein the fluid sensor is a fluid pressure sensor configured to sense a pressure difference between an inflow pressure and an outflow pressure of a fluid flowing therethrough and generate a corresponding electrical signal based on the pressure difference.
7. The cassette of claim 6, wherein one of the first and second cassette parts further has a temperature sensor disposed in the recess for contacting and detecting a temperature of a conduit contained therein;
the processing unit is preset with a flow calculation algorithm, the flow calculation algorithm comprises different flow speed-pressure difference functions respectively corresponding to a plurality of temperature intervals, and the processing unit is configured to be capable of receiving the pressure difference and the temperature acquired by the liquid pressure sensing device and the temperature sensor and calculating the liquid flow speed and/or the liquid flow rate of the liquid pressure sensing device according to the received temperature and by adopting the corresponding flow speed-pressure difference functions according to different temperature intervals.
8. The cassette of claim 7, wherein the flow rate-pressure differential function is v ═ AX3+BX2+ CX + D, where v is the flow rate, x is the pressure difference, the coefficient A, B, C, D is a constant preset for each temperature interval, the processing unit is configured to select the corresponding coefficient value according to the temperature interval to which the temperature sensor detects the temperature, and calculate the liquid flow rate.
9. The cassette for detecting flow of liquid in a medical flow-through device according to claim 7, wherein one of the first and second cassette parts is further arranged with a display unit configured to be able to receive and display the liquid flow rate and/or the liquid flow rate from the processing unit.
10. The cassette for detecting flow of fluid in a medical flow-through device of claim 7, wherein one of the first and second cassette parts is further arranged with a wireless communication unit configured to be able to communicate with a hospital information system to upload locally calculated fluid flow rates and/or fluid flow volumes to the hospital information system.
11. The cassette of any of claims 1-10, wherein each corner of the cassette has an arcuate chamfer.
12. A testing system for testing fluid flow in a medical flow-through device, the testing system comprising the testing cassette of any of claims 1-11 for testing fluid flow in a medical flow-through device and the fluid sensing device disposed in the conduit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210112993.6A CN114487390B (en) | 2022-01-29 | 2022-01-29 | Detection box and detection system for detecting liquid flow in medical diversion device |
| PCT/CN2023/073259 WO2023143405A1 (en) | 2022-01-29 | 2023-01-19 | Detection box and detection system for detecting liquid flow in medical flow guide device |
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| CN202210112993.6A CN114487390B (en) | 2022-01-29 | 2022-01-29 | Detection box and detection system for detecting liquid flow in medical diversion device |
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Cited By (1)
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| WO2023143405A1 (en) * | 2022-01-29 | 2023-08-03 | 美昕医疗器械(昆山)有限公司 | Detection box and detection system for detecting liquid flow in medical flow guide device |
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| Publication number | Publication date |
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| WO2023143405A1 (en) | 2023-08-03 |
| CN114487390B (en) | 2023-03-17 |
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