CN108742589B

CN108742589B - Portable cerebrospinal fluid flow guiding device

Info

Publication number: CN108742589B
Application number: CN201810689185.XA
Authority: CN
Inventors: 李运甲; 戚成飞; 曹建安
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2018-06-28
Filing date: 2018-06-28
Publication date: 2020-10-27
Anticipated expiration: 2038-06-28
Also published as: CN108742589A

Abstract

The invention relates to a portable cerebrospinal fluid flow guiding device which comprises a flow guiding pipe, a pressure collecting unit, a peristaltic pump, a host and a flow guiding bag, wherein the flow guiding pipe is connected with the pressure collecting unit; the pressure acquisition unit comprises a pressure acquisition unit shell, a sensor array and a mark identification circuit; the main equipment comprises a power module, a battery pack, a battery, a motor driving circuit, a core board, a touch display screen and the like; the peristaltic pump comprises a motor, a peristaltic pump head and the like; the pressure acquisition unit is connected with the peristaltic pump through a connector; one end of the flow guide pipe is inserted into the ventricle, the pressure acquisition unit acquires pressure, then transmits data back to the peristaltic pump and then transmits the data back to the core board, and the core board performs processing analysis and makes related operations; the core board sends the command to the motor driving circuit through the second wireless transceiving circuit and the first wireless transceiving circuit, and the motor driving circuit controls the motor to drive the peristaltic pump head to rotate. The invention can be used for controlling the flow guide of body fluid and accurately measuring the pressure of the body fluid of a human body through the pressure sensor.

Description

Portable cerebrospinal fluid flow guiding device

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a portable cerebrospinal fluid flow guiding device.

Background

Diversion is a surgical treatment means, which is a technique for guiding pus, blood or other liquid accumulated between human tissues or in a body cavity to the outside of the body or in the body cavity. Surgical diversion does not simply involve introducing fluid accumulated in a tissue or a body cavity to the outside of the body, i.e., external diversion, such as abscess incision, enterostomy, abdominal diversion, thoracic diversion, and the like, but also involves internal diversion, i.e., diversion of fluid flowing through other hollow organs by diversion or shunt to achieve the purpose of diversion, such as internal diversion of biliary tract, pancreatic cyst, and the like.

The clinical application has a plurality of surgical diversion types, some are used for catheterization, and some are used for wounds, thoracic cavities, brain cavities, gastrointestinal tracts, biliary tracts and the like. The surgical diversion aims to guide pus, blood and liquid accumulated in human tissues or body cavities to the outside of the body so as to prevent postoperative infection and influence on wound healing.

Intracranial pressure (ICP) refers to the pressure of the cranial cavity contents on the wall of the cranial cavity, also known as cerebral pressure. Since the cerebrospinal fluid present in the subarachnoid and intracisternal spaces is between the wall of the cranial cavity and the brain tissue and communicates between the ventricles and the subarachnoid spaces in the spinal cavity, the hydrostatic pressure of the cerebrospinal fluid can represent the intracranial pressure, usually the craniocerebral spinal fluid pressure in the lateral decubitus. Puncture the medulla oblongata or lateral ventricle of brain, and obtain the reading measured by a piezometer tube or a pressure gauge, which is the clinical intracranial pressure. This pressure is close to the cerebrospinal fluid pressure measured by lateral lumbar puncture, so the latter pressure is used clinically as a representative. Normal intracranial pressure is 0.7 to 2.0kPa (5 to 15mmHg) for adults and 0.5 to 1.0kPa (3.5 to 7.5mmHg) for children in the lateral decubitus position, which is higher than the highest point of the lateral ventricle in the horizontal decubitus position. The lumbar puncture pressure can reach 3.3-4.0 kPa (25-30 mmHg) when sitting.

Subarachnoid hemorrhage (SAH) is a common disease in neurosurgery. Early treatment has important clinical value for SAH, and clinically, an appropriate diversion method is recommended to be selected for surgical treatment as soon as possible. In recent years, the clinical application reports of the lateral ventricle puncture combined with the body fluid diversion are increased, the lateral ventricle puncture combined body fluid diversion can be used for treating SAH, and the lateral ventricle puncture combined body fluid diversion has the advantages of convenience in operation, high safety, good effect and the like. Meanwhile, the monitoring of the intracranial pressure has important significance clinically: clinically, intracranial pressure monitoring technology is applied to the treatment of diseases such as craniocerebral trauma, hypertensive cerebral hemorrhage, intracranial tumors, cerebrovascular diseases and the like, and particularly, the application to patients with craniocerebral trauma accumulates a large amount of clinical data. Most researches show that intracranial pressure monitoring can continuously reflect the intracranial pressure change of patients, and has important guiding significance in the aspects of judging intracranial injury and the severity of brain swelling, guiding treatment, evaluating prognosis and the like. The intracranial pressure change can be dynamically known in real time, so that the condition observation is facilitated, and the intracranial pressure increase can be found as early as possible and can be treated as early as possible; intracranial pressure monitoring is an important basis for judging the severity of brain injury of a patient and predicting consequences; help calculate and maintain craniocerebral perfusion pressure; the flow guiding and reasonable dehydration outside the ventricles of the brain play a role in good intracranial pressure control.

At present, intracranial pressure monitoring is mainly divided into invasive intracranial pressure detection and noninvasive intracranial pressure monitoring, wherein the invasive detection mainly comprises lumbar puncture detection, intracerebroventricular detection, intraparenchymal brain detection, subarachnoid cavity detection, epidural detection, neuroendoscopy intraoperative detection, remote intracranial pressure monitoring technology and the like; the non-invasive monitoring mainly comprises clinical manifestation and impression examination, optic nerve sheath diameter monitoring, retinal vein pressure or artery pressure monitoring, transcranial Doppler ultrasound monitoring, flash vision evoked potential detection, periosteum displacement monitoring, anterior halogen monitoring and the like.

According to the situations, the situations that body fluid needs to be guided and pressure needs to be monitored in clinical application can be met, a device with functions of detecting and automatically guiding the body fluid of a human body is relatively lacked in the domestic market at present, and equipment is often large in size, heavy in weight and complex in operation.

Disclosure of Invention

The invention aims to provide a portable cerebrospinal fluid diversion device which can be used for controlling diversion of body fluid, can accurately measure the pressure of body fluid of a human body through a pressure sensor, analyzes and judges the current condition of a patient according to the pressure measurement result, and diagnoses the condition of the patient according to the analysis result.

The invention is realized by adopting the following technical scheme:

a portable cerebrospinal fluid diversion device comprises a diversion tube, a pressure acquisition unit, a peristaltic pump, a diversion bag and a host; wherein the content of the first and second substances,

the pressure acquisition unit comprises a pressure acquisition unit shell, a sensor array arranged at a side wall hole of the pressure acquisition unit shell and a mark identification circuit used for supplying power to the sensor array; the peristaltic pump comprises a peristaltic pump shell, a motor peristaltic pump head, a battery pack, a connector, a first wireless transceiver circuit, a motor driving circuit and a battery pack management circuit, and the host machine comprises a second wireless transceiver circuit, a power supply module, a battery management circuit, a signal conditioning circuit, a power supply circuit, a battery and a core board;

the pressure acquisition unit is connected with the peristaltic pump through a connector; the battery pack is used for supplying power to the peristaltic pump and is controlled by the battery pack management circuit; the second wireless transceiver circuit is used for being matched with the first wireless transceiver circuit to work so as to carry out data communication between the host and the peristaltic pump; the power module is used for converting 220VAC of an external power line into voltage which can be used by the device; the battery management circuit and the signal conditioning circuit are used for processing the signal transmitted back by the peristaltic pump and then transmitting the processed signal to the core board, and the battery is used for supplying power to a clock of the core board; the power supply circuit is used for generating different voltage values to be used for carrying out voltage reduction processing on the voltage of the power supply module, the voltage is provided for circuit components of the signal conditioning circuit to enable the circuit components to work in a voltage range with the best performance, and the signal conditioning circuit is used for processing signals of the pressure acquisition unit under the power supply of the power supply circuit;

when the pressure-measuring and flow-guiding device works, one end of a flow guiding pipe is inserted into a cavity needing pressure detection or flow guiding operation, the next section of flow guiding pipe is installed with a pressure acquisition unit, the next section of flow guiding pipe is installed with a peristaltic pump for flow guiding, and finally the tail end of the flow guiding pipe is connected with a flow guiding bag which is used for assisting flow guiding and pressure measurement; the pressure sensor array in the pressure acquisition unit is used for being in contact with cerebrospinal fluid to acquire pressure when being installed with the flow guide pipe to work in a matched mode to measure pressure, then data are transmitted back to the peristaltic pump through the connector and then are transmitted back to the main machine through the first wireless transceiver circuit and the second wireless transceiver circuit, the signal conditioning circuit processes the acquired signals and transmits the processed signals back to the core board, the core board processes and analyzes the received data again, and then condition judgment is given according to the result and relevant operation is carried out; when the flow guide operation is needed, the core board issues commands to the peristaltic pump, the peristaltic pump sends the commands to the motor driving circuit, the motor driving circuit generates pulses capable of controlling the rotation of the motor, when the motor drives the pump head of the peristaltic pump to rotate, liquid in the flow guide pipe is extruded to be discharged, and the whole device achieves the functions of real-time monitoring and analysis of pressure and flow guide.

The invention has the further improvement that the flow guide pipe adopts a silica gel hose.

The invention has the further improvement that the host machine also comprises a USB interface, an alarm and a touch display screen, and the touch display screen is used for displaying relevant information in real time and performing man-machine interaction.

The peristaltic pump further comprises a proximity switch, a peristaltic pump head is arranged at a cylindrical groove in a peristaltic pump shell, a motor is arranged below the peristaltic pump shell, a rotating shaft of the motor is inserted through a hole in the bottom of the peristaltic pump shell and is fixedly arranged with the peristaltic pump head through a screw hole, a flow guide pipe is wound on the peristaltic pump head, and the proximity switch is used for measuring the rotating speed of the peristaltic pump.

A further improvement of the present invention is that the core board is an embedded computer processor and its peripheral circuit elements.

The invention is further improved in that the number of the sensors in the pressure sensor array in the pressure acquisition unit is two or more.

The invention has the further improvement that the power supply module adopts a 24VDC voltage-stabilized power supply to ensure the power supply of the whole device; the battery pack and the battery adopt lithium ion/lithium polymer batteries, and can be detached for replacement and repeated charge and discharge.

The peristaltic pump is further improved in that a groove for installing a flow guide pipe is reserved in the peristaltic pump to fix the positions of the motor and the peristaltic pump head, and at least two cylindrical rollers for extruding liquid in the flow guide pipe are arranged on the peristaltic pump head so as to ensure that at least one cylindrical roller is in a state of extruding the flow guide pipe at any moment;

the motor driving circuit receives a signal from the core board to the second wireless transceiver circuit and generates a two-phase pulse capable of driving the motor.

The invention has the further improvement that the signal conditioning circuit in the host comprises an amplifying circuit, a filtering circuit and a data conversion circuit, wherein the signal read out from the pressure acquisition unit is amplified by the amplifying circuit, then the filtering circuit filters the signal, after an invalid noise signal is filtered out, the invalid noise signal is finally converted into a digital quantity which can be received and processed by the processor through the data conversion circuit, and then the signal is output to the embedded processor on the core board from the signal conditioning circuit.

The invention is further improved in that the pressure acquisition unit is used for measuring the pressure difference between the liquid and the atmospheric pressure, the pressure sensor adopted by the pressure acquisition unit is provided with a temperature compensation function, the acquired pressure signal can be corrected according to the temperature of the current environment, and the acquired pressure signal and the temperature compensation function are combined to output a final signal.

The invention has the following beneficial technical effects:

the portable cerebrospinal fluid flow guide device provided by the invention can simply and accurately realize pressure acquisition, the pressure acquisition unit for measuring pressure is adhered to the position close to the ventricle needing to measure pressure, the pressure measurement position is the same, meanwhile, the pressure acquisition unit is small in size and light in weight, no other influence is caused to a patient in the pressure measurement process, most of the prior art implants the pressure acquisition part into the human body, the infection risk is increased, and the normal function of the human body is influenced, but the external pressure measurement adopted by the invention has no similar problem.

Meanwhile, the peristaltic pump and the host machine which are used for guiding the flow can be in wireless communication with each other, so that extra wires or machines are not needed for connection, the peristaltic pump can move along with a patient, a main execution part and a processing part of the device are separated, the peristaltic pump can be carried around the patient more conveniently, and the peristaltic pump is more flexible and convenient.

More so, current techniques are limited to simple rough flow guidance or precise manipulation after performing auxiliary cycles in the body rather than calculating rate times and the like. The invention can also accurately guide the flow of the cavity and the body fluid through a related algorithm to adjust the related functions and normal circulation of the human body, and the system can accurately control the flow guiding rate, the flow guiding quantity, the flow guiding time and other variables and adjust the flow guiding rate, the flow guiding quantity, the flow guiding time and other variables in real time according to the data returned by the pressure acquisition unit, so that the patient can be monitored accurately at the highest speed and the automatic flow guiding can be ensured without accompanying and monitoring the patient by a person in real time.

The peristaltic pump is provided with a first wireless transceiving path which can be in wireless communication with the host, so that the peristaltic pump can move along with a patient, is convenient to carry, and can continue to conduct diversion operation when the patient moves.

Furthermore, the honeycomb duct adopts a silica gel hose, has certain elasticity, certain wear resistance, certain pressure bearing capacity, no leakage (good air tightness), low adsorptivity, good temperature resistance, difficult aging, no swelling, corrosion resistance and low precipitate.

Furthermore, the invention displays the condition of the patient in an image and digital way by touching the display screen, so that the condition of the patient in the past period and the present condition can be clearly seen, the future trend can be predicted from the condition, the medical care personnel can accurately master the condition of the patient, and the man-machine interaction can be carried out by touching the display screen, so that the machine can be directly controlled to run manually.

Furthermore, the invention can store and export the data through the USB interface, thereby facilitating the further recording and analysis of the related data information.

Furthermore, the invention is provided with an audible and visual alarm, which can automatically or manually alarm and ensure that the abnormal condition of the patient or the device can be reflected in time.

Drawings

Fig. 1 is a schematic view of a portable cerebrospinal fluid diversion apparatus of the present invention.

Fig. 2 is a schematic view of a pressure acquisition unit.

Fig. 3 is a structural view of the peristaltic pump.

Fig. 4 is a block diagram of the host.

Description of reference numerals: the system comprises a flow guide pipe 1, a pressure acquisition unit 2, a pressure acquisition unit shell 21, a pressure sensor array 22, a mark identification circuit 23, a peristaltic pump 3, a peristaltic pump shell 31, a motor 32, a peristaltic pump head 33, a battery pack 34, a connector 35, a first wireless transceiver circuit 36, a motor driving circuit 37, a battery pack management circuit 38, a proximity switch 39, a flow guide bag 4, a host computer 5, a wireless transceiver circuit 51, a power module 52, a battery management circuit 53, a signal conditioning circuit 54, a power circuit 55, a battery 56, a USB interface 57, a touch display screen 58, an alarm 59 and a core board 510.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the portable cerebrospinal fluid diversion device provided by the present invention mainly comprises the following components: the device comprises a flow guide pipe 1, a pressure acquisition unit 2, a peristaltic pump 3, a flow guide bag 4 and a host 5.

The guide tube 1 comprises a pipeline, a regulating valve, a three-way valve and the like, and when in use, one end of the guide tube is inserted into the ventricle of a patient, and the other end is connected with the guide bag 4.

The pressure acquisition unit 2 is provided with a cardiac electrode paste which can be pasted on the skin and is used for installing the pressure acquisition unit 2 at the position near the cavity of a patient needing flow guiding and pressure monitoring, so that the pressure can be accurately measured. When body fluid enters the pressure acquisition unit 2 through the flow guide tube, the body fluid flows through a channel provided with the pressure sensor array 22 in the pressure acquisition unit 2, pressure acts on a membrane of the pressure sensor array 22 through the body fluid, and the pressure sensor array 22 finally outputs a current measured pressure value by combining the deformation degree of the membrane and the current environment temperature, and transmits data back to the first wireless transceiving circuit 36 in the peristaltic pump 3 through the connector 35 and then transmits the data to the signal conditioning circuit 54 of the host 5.

The peristaltic pump 3 mainly comprises a peristaltic pump shell 31, a motor 32, a peristaltic pump head 33, a battery pack 34, a connector 35, a wireless transceiver circuit 36, a motor drive circuit 37, a battery management circuit 38, a proximity switch 39 and the like. The peristaltic pump shell 31 is used for installing the motor 32 and the peristaltic pump head 33, the battery pack 34 is responsible for power supply conditions of the peristaltic pump, the connector 35 is responsible for data transmission with the pressure acquisition unit 2, the first wireless transceiver circuit 36 is mainly responsible for data communication with the second wireless transceiver circuit 51 of the host 5, the battery pack management circuit 38 can record voltage and current conditions of the battery pack 34 and calculate consumed power of the peristaltic pump 3 and calculate residual electric quantity and expected residual service time of the battery pack 34, the motor driving circuit 37 outputs driving voltage to the motor 32 by receiving square wave signals from the core board 510, and the rotating speed of the motor 32 is changed by changing frequency of the square waves.

The host 5 comprises a second wireless transceiver circuit 51 which is responsible for communicating with the peristaltic pump 3, the power supply module 52 provides electric energy for the whole host, the battery management circuit 53 is responsible for charging and discharging of electric quantity management of the battery 56, the signal conditioning circuit 54 processes signals transmitted by the peristaltic pump 3, the power supply circuit 55 processes and converts output voltage of the power supply module 52 into a voltage range within which each chip can normally work, the battery 56, the USB interface 57, the touch display screen 58, the alarm 59 and the core board 510.

The signal conditioning circuit 54 includes a filter circuit, a signal amplifying circuit, and a data converting circuit; the above circuits include resistance capacitances in the associated integrated circuit chip and its associated peripheral circuitry. The filter circuit adopts the combination of an operational amplifier and a resistance capacitor to filter noise in a received signal, the amplifying circuit adopts an instrument amplifier chip to amplify the signal, and the signal resolution ratio returned by the peristaltic pump 3 is low, so that the core board 310 is difficult to process, and the calculation and analysis of a processor can be facilitated by amplifying the signal; the data conversion circuit functions to convert the analog signal amplified by the amplifying circuit into a digital signal that can be received and processed by the core board 510.

The battery management circuit 53 may monitor the charge of the battery 56, which includes the measurement and calculation of physical quantities such as voltage, current, temperature, etc., and may also be responsible for the managed charging of the battery 56. It also includes data communication with the core board 510, on one hand, transmitting the information related to the battery 56 to the core board 510, and on the other hand, receiving and executing the command issued by the core board 510.

The core board 510 processes and compares the pressure values of a plurality of points collected by the pressure collecting unit 2, analyzes the current condition of the patient through a PID algorithm, has a default value as a pressure regulating target when the machine is started, then collects and returns pressure data to compare with a set value, then performs proportional, integral and differential operations on the comparison result, and the operation processing result is used as a main parameter for regulating and controlling the pressure and is used for controlling the flow guiding speed of the peristaltic pump 3. Meanwhile, the core board 519 with the proximity switch 39 capable of measuring the rotating speed on the peristaltic pump 3 can also judge the current flow guiding rate and the volume of the body fluid which is guided according to the rotating speed of the peristaltic pump 3, so that more comprehensive feedback can be obtained;

the diversion speed or the diversion body can be manually input for diversion, and automatic and manual switching between two function modes can be realized.

For a further understanding of the present invention, reference will now be made to the following further description.

The pressure acquisition unit 2 comprises a sensor array, a UID circuit 22 and a pressure acquisition unit shell 21. The pressure sensor has small size, low cost, low power consumption, convenient installation and fixation and no toxic or side effect on patients. The pressure acquisition unit 2 does not need to be implanted into the brain, only one end of the flow guide pipe 1 needs to be inserted into the ventricle, and the operation is simple, so that the infection in the pressure monitoring process and the influence on other normal functions of the brain of a patient are avoided. The pressure sensor is provided with a temperature compensation function, so that the pressure of the liquid can be normally and accurately measured within a wide temperature range. Preferably, the pressure sensor is a differential pressure sensor, and the measured pressure value is a difference value relative to the atmospheric pressure in the current environment, so that the advantages of small volume, light weight, high precision and low power consumption are achieved. The pressure sensor is provided with a film capable of sensing pressure, when the film contacts body fluid, the pressure acts on the film to deform the film, and the strength of the deformation degree can be reflected into electric signals with different sizes. The signal is then transmitted to the peristaltic pump 3 through the connector.

Also inside the pressure pick-up unit 2 is a logo identification circuit 23 for powering the sensor array 22. This circuit has discernment memory function, and pressure acquisition unit 2 has a serial number through the chip that has the recognition function and gives core plate 510 to core plate 510 can distinguish this pressure acquisition unit 2 and the honeycomb duct 1 who is connected with it and whether used once, used once on which patient, and then prevent the use of a lot of confusion of same cover pipe, the record of the data of being convenient for is handled and better must guarantee that this set of device accords with the clinical requirement in medical field.

The pressure acquisition unit housing 21 is made of PC material and can withstand steam, cleaning agents, heat and large dose radiation sterilization without yellowing and physical property degradation. Holes are reserved in a channel for guiding in the internal structure of the pressure acquisition unit shell 21 and used for installing and fixing the sensor array 22 to acquire pressure data, and cyanoacrylate medical adhesive is used for fixing the sensor array 22 and the pressure acquisition unit shell 21.

The peristaltic pump 3 and the flow guide pipe 1 work together to complete the regulation and control of the pressure. One end of the flow guide tube 1 is inserted into a ventricle from the skull of a patient, on one hand, the flow guide tube is used for being connected with a shell 21 of the pressure acquisition unit to facilitate the measurement of intracranial pressure, and is also partially assembled with the peristaltic pump 3 to complete the regulation and control of the intracranial pressure, and the tail end of the flow guide tube is connected with the flow guide bag 4 to be used for discharging the led liquid into the flow guide bag 4. The diversion bag 4 is connected with the tail end of the diversion pipe 1 together and is used for collecting liquid led out by the peristaltic pump 3. The peristaltic pump shell 31 is used for installing the motor 32, the flow guide pipe 1, the peristaltic pump head 33, the proximity switch 39 and the like in the peristaltic pump. Peristaltic pump head 33 is used for working with honeycomb duct 1 jointly, and peristaltic pump head 33 can extrude honeycomb duct 1 through the gyro wheel in self structure when being driven by motor 32 and doing the rotation to initiatively the water conservancy diversion and then realize the regulation and control to intracranial pressure to the cerebrospinal fluid.

The honeycomb duct 1 is made of silica gel, and has more excellent performance and longer service life.

The peristaltic pump housing 31 is hard PC.

The proximity switch 39 is a hall switch, and the proximity switch 39 is used to check whether the peristaltic pump 3 is rigidly mounted to the fluid conduit 1, and to detect the rotational speed of the peristaltic pump 3 to calculate the volume of fluid flowing out.

The motor drive circuit 37 is configured to receive a signal from the host computer 5 to drive the motor 32, and to control a rotational speed direction and the like of the motor 32. The motor drive circuit 37 can vary the operating state and power of the peristaltic pump 3 by varying its input voltage and signal. The motor 32 is a stepping motor, and the motor 32 and the rotating shaft are fixed with the peristaltic pump head 33 through screws.

The charging is automatically terminated when the battery 56 is fully charged and an alarm is generated when the battery 56 is too low. The battery management circuit 53 is also provided with a charge protection electric quantity for battery protection against an overcurrent, overvoltage and an overheat abnormal charge state. The signal conditioning circuit 54 performs filtering, voltage stabilizing, amplifying, and converting on the signal transmitted back from the pressure acquisition unit 2, and processes the signal into a signal that can be received and identified by the core board 38 and then transmits back to the core board 510.

The touch display screen 58 is used for displaying the pressure change condition of the patient related information at present and in a period of time in real time, and can perform human-computer interaction through touch, manually input information and operate the device, such as presetting a pressure value and a pressure range, manually operating the peristaltic pump 3 to work, setting the whole device, and the like.

The USB interface 57 is used to record and export or store information about the current patient and the current set of devices for subsequent analysis of the data.

The alarm 59 is a common speaker, and the alarm 59 is used for sounding an alarm when monitoring pressure abnormality.

The core board 510 is the most core processing part of the whole device, and is responsible for controlling the normal and stable operation of the whole device, and analyzing and calculating the data collected by the pressure collecting unit 2 and the data generated by the charging and discharging state, the flow guiding process and the like of the battery 56.

The core board 510, if necessary for intracranial pressure collection, will start the collection mode, perform data exchange with the pressure collection unit 2, the acquisition mode is switched off when no information acquisition is required, the signals of the pressure acquisition unit 2 are not received and processed any more, when receiving and processing the signal of the pressure acquisition unit 2, the received pressure value is compared with a preset value, according to the magnitude of the difference between the two pressures, in combination with a PID control algorithm, according to the current value of the pressure and the previous course of variation, the current condition of the patient is diagnosed and judged, the trend of the future pressure is predicted, if the peristaltic pump 3 is required to adjust and intervene the pressure, a signal is sent to the first wireless transceiver circuit of the peristaltic pump 3 and the motor driver circuit 37 executes the received command when the signal is transmitted to the motor driver circuit 37. During the discharging of the battery pack 34 and the charging and discharging of the battery 56, the core board 510 will continuously receive the data related to the battery pack 34 and the battery 56 from the first wireless transceiver circuit to implement the status monitoring of the power system of the whole device, issue related instructions to operate if charging or disconnecting charging is required, and trigger an alarm if the current operating status of the battery pack 34 or the battery 56 is abnormal.

The data transmission process is that the pressure acquisition unit 2 acquires the data and then transmits the data to the peristaltic pump 3 through the connector 35, the first wireless transceiver circuit 36 in the peristaltic pump 3 is then transmitted to the second wireless transceiver circuit 51 of the host 5, then the data is processed by the signal conditioning circuit 54 and then transmitted back to the core board 510, and when an instruction needs to be sent, the data is also transmitted to the second wireless transceiver circuit 51, then the data is transmitted to the first wireless transceiver circuit 36, and then the data is transmitted to other parts according to the specific content of the instruction.

The power module 52 is used to charge the entire system, with a 24VDC constant power supply.

The battery pack 34 is a lithium ion rechargeable battery pack for powering the entire system. The battery 33 is a lithium ion battery, which can be disassembled to perform a charging operation when the amount of electricity is insufficient.

The battery 56 is a rechargeable lithium ion battery and is responsible for powering the clock of the core board 510.

Claims

1. A portable cerebrospinal fluid flow guiding device is characterized by comprising a flow guiding pipe (1), a pressure collecting unit (2), a peristaltic pump (3), a flow guiding bag (4) and a host (5); wherein the content of the first and second substances,

the pressure acquisition unit (2) comprises a pressure acquisition unit shell (21), a sensor array (22) arranged at a side wall hole of the pressure acquisition unit shell (21) and a mark identification circuit (23) for supplying power to the sensor array (22); the peristaltic pump (3) comprises a peristaltic pump shell (31), a motor (32), a peristaltic pump head (33), a battery pack (34), a connector (35), a first wireless transceiving circuit (36), a motor driving circuit (37) and a battery pack management circuit (38), and the host (5) comprises a second wireless transceiving circuit (51), a power supply module (52), a battery management circuit (53), a signal conditioning circuit (54), a power supply circuit (55), a battery (56) and a core board (510);

the pressure acquisition unit (2) is connected with the peristaltic pump (3) through a connector (35); the battery pack (34) is used for supplying power to the peristaltic pump (3) and is controlled by a battery pack management circuit (38); the second wireless transceiver circuit (51) is used for being matched with the first wireless transceiver circuit (36) to work so as to carry out data communication between the host (5) and the peristaltic pump (3); the power supply module (52) is used for converting 220VAC of an external power line into voltage which can be used by the device; the battery management circuit (53) and the signal conditioning circuit (54) are used for processing the signal transmitted back by the peristaltic pump (3) and then transmitting the processed signal to the core board (510), and the battery (56) is used for supplying power to the clock of the core board (510); the power supply circuit (55) is used for generating different voltage values to be used for carrying out voltage reduction processing on the voltage of the power supply module (52), the voltage is provided for circuit components of the signal conditioning circuit (54) to enable the signal conditioning circuit to work in a voltage range with the best performance, and the signal conditioning circuit (54) is used for processing the signal of the pressure acquisition unit (2) under the power supply of the power supply circuit (55);

the signal conditioning circuit (54) in the host (5) comprises an amplifying circuit, a filtering circuit and a data conversion circuit, signals read out from the pressure acquisition unit (2) are amplified through the amplifying circuit, then the signals are subjected to filtering processing through the filtering circuit, invalid noise signals are filtered out, finally the signals are converted into digital quantity which can be processed by a processor through the data conversion circuit, and then the signals are output to the embedded processor on the core board (510) from the signal conditioning circuit (54); the pressure acquisition unit (2) is used for measuring the pressure difference between liquid and atmospheric pressure, and a pressure sensor adopted by the pressure acquisition unit has a temperature compensation function, so that the acquired pressure signal can be corrected according to the temperature of the current environment, and the acquired pressure signal and the temperature compensation function are combined to output a final signal;

the peristaltic pump (3) further comprises a proximity switch (39), a peristaltic pump head (33) is installed at a cylindrical groove in a peristaltic pump shell (31), a motor (32) is installed below the peristaltic pump shell (31), a rotating shaft of the motor (32) is inserted through a hole in the bottom of the peristaltic pump shell (31) and is fixedly installed with the peristaltic pump head (33) through a screw hole, the flow guide pipe (1) is wound on the peristaltic pump head (33), and the proximity switch (39) is used for measuring the rotating speed of the peristaltic pump (3);

the peristaltic pump (3) is provided with a groove for installing the draft tube (1) to fix the position of the motor (32) and the peristaltic pump head (33), and at least two cylindrical rollers for extruding liquid in the draft tube (1) are arranged on the peristaltic pump head (33) so as to ensure that at least one cylindrical roller is in a state of extruding the draft tube (1) at any moment; the motor driving circuit (37) receives a signal from the core board (510) to the second wireless transceiver circuit (51) and generates a two-phase pulse capable of driving the motor (32);

when the pressure-measuring and flow-guiding device works, one end of a flow guiding pipe (1) is inserted into a cavity needing pressure detection or flow guiding operation, the next section of flow guiding pipe (1) is installed with a pressure acquisition unit (2), the next section of flow guiding pipe (1) is installed with a peristaltic pump (3) for flow guiding, finally, the tail end of the flow guiding pipe (1) is connected with a flow guiding bag (4), and the flow guiding pipe (1) is used for assisting in flow guiding and pressure measurement; the pressure sensor array (22) in the pressure acquisition unit (2) used for being installed with the draft tube (1) to cooperate to work for pressure measurement is in contact with cerebrospinal fluid for pressure acquisition, data are transmitted back to the peristaltic pump (3) through the connector (35) and then are transmitted back to the host (5) through the first wireless transceiver circuit (36) and the second wireless transceiver circuit (51), the signal conditioning circuit (54) processes the acquired signals and then transmits the processed signals back to the core board (510), the core board (510) processes and analyzes the received data again, and then condition judgment is given according to the result and relevant operation is made; when the flow guiding operation is needed, the core board (510) issues the command to the peristaltic pump (3), the peristaltic pump (3) sends the command to the motor driving circuit (37), the motor driving circuit (37) generates a pulse capable of controlling the rotation of the motor (32), when the motor (32) drives the peristaltic pump head (33) to rotate, liquid in the extrusion flow guiding pipe (1) is extruded to be discharged, and the whole device achieves the functions of monitoring, analyzing and guiding the flow of the pressure in real time.

2. The portable cerebrospinal fluid flow guiding device according to claim 1, characterized in that the flow guiding tube (1) is a silicone hose.

3. The portable cerebrospinal fluid guiding device according to claim 1, characterized in that the host (5) further comprises a USB interface (57), an alarm (59) and a touch display screen (58), the touch display screen (58) is used for displaying relevant information in real time and performing human-computer interaction.

4. The portable cerebrospinal fluid guiding device of claim 1, wherein the core board (510) is an embedded computer processor and its peripheral circuit components.

5. The portable cerebrospinal fluid guiding device according to claim 1, characterized in that the number of sensors in the pressure sensor array in the pressure collection unit (2) is two or more.

6. The portable cerebrospinal fluid guiding device according to claim 1, wherein the power supply module (52) adopts a 24VDC voltage-stabilized power supply to ensure the power supply of the whole device; the battery pack (34) and the battery (56) are lithium ion/lithium polymer batteries, and can be detached for replacement and repeatedly charged and discharged.