CN219699918U - Intracranial probe and intracranial detection assembly - Google Patents

Abstract

The utility model relates to an intracranial probe and an intracranial detection assembly, the intracranial probe comprises: the shell is provided with a window, an accommodating chamber communicated with the window is arranged in the shell, and a step structure is formed on the side wall of the accommodating chamber; the sensor assembly is arranged in the accommodating chamber and comprises a pressure sensor and a temperature sensor, the pressure sensor is arranged on the table top of the step structure and faces the window, the temperature sensor is arranged in a closed cavity of the intracranial fluid isolated by the inside of the shell, and a channel which is positioned between the pressure sensor and the temperature sensor and is communicated with standard air pressure is formed on the side wall of the step structure. The intracranial probe provided by the utility model has the advantages that the pressure sensor is arranged through the window facing surface of the step structure, so that the aim of sensing intracranial pressure on the front surface is fulfilled, a channel communicated with standard air pressure is formed on one side of the step structure, which is opposite to the pressure sensor, of the pressure sensor assembly, the sensing zero point of the sensor assembly is corrected through the standard air pressure, and the phenomenon that the sensor assembly senses zero point drift is reduced.

Description

Intracranial probe and intracranial detection assembly

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an intracranial probe and an intracranial detection assembly.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

Intracranial pressure and intracranial temperature are important parameter indicators for craniotomy, intracranial pressure (intracranial pressure, ICP) is an important indicator reflecting physiological status of the Central Nervous System (CNS) and intracranial hemodynamics, and intracranial monitoring includes invasive monitoring, which mainly includes transcatheter extracerebral drainage (external ventricular drainage, EVD), lumbar Puncture (LP) and Lumbar Drainage (LD), epidural and subdural pressure sensors, implanted microsensors, intraparenchymal probes, telemetry sensors, etc.

The existing invasive intracranial monitoring has the following defects:

1) The intracranial probe is oversized: the intracranial probe needs to go deep into brain tissues of a patient to carry out corresponding data measurement, and the needed wound is overlarge due to overlarge intracranial probe, so that secondary damage is easy to cause;

2) The intracranial probe comprises a temperature sensor and a pressure sensor, the intracranial probe penetrates into the cranium of a patient, the pressure and the temperature are measured through the pressure sensor and the temperature sensor, and the condition that zero drift is caused by measurement errors can occur due to unreasonable installation of the pressure sensor and the temperature sensor;

3) The intracranial probe of the patient needs to be placed in the cranium for a long time during cranium operation, the temperature sensor can continuously measure the temperature for a long time to easily cause the drift of the zero point of the measured temperature, the measurement is inaccurate, the pressure sensor surface is subjected to pressure for a long time, and the pressure film is easily deformed to cause the drift of the zero point of the pressure, so that the measurement error is increased.

Disclosure of Invention

The utility model aims to at least solve the technical problems that the volume of an intracranial probe is increased and the induction effect of the intracranial probe is affected due to unreasonable internal structure layout of the intracranial probe, and the utility model is realized by the following technical scheme:

a first aspect of the utility model provides an intracranial probe comprising: the shell is provided with a window, an accommodating chamber communicated with the window is arranged in the shell, and a step structure is formed on the side wall of the accommodating chamber; the sensor assembly is arranged in the accommodating chamber and comprises a pressure sensor and a temperature sensor, the pressure sensor is arranged on the table top of the step structure and faces the window, the temperature sensor is arranged in a closed cavity of the intracranial fluid isolated by the inside of the shell, and a channel which is positioned between the pressure sensor and the temperature sensor and is communicated with standard air pressure is formed on the side wall of the step structure.

It can be appreciated by those skilled in the art that the intracranial probe of the utility model provides that the pressure sensor and the temperature sensor are integrated in the intracranial probe, and the pressure sensor is matched with the pressure sensor and the temperature sensor through the step structure, so that the pressure sensor can achieve the aim of sensing intracranial pressure in a front way through the window facing the table surface of the step structure, the temperature sensor is arranged in the shell to isolate a closed cavity of the intracranial fluid, the aim of isolating the temperature sensor from direct contact with the intracranial fluid is achieved, a channel between the pressure sensor and the temperature sensor is formed by the side wall of the step structure and is communicated with standard air pressure, and the phenomenon of sensing zero drift of the sensor assembly in the use process is reduced through the sensing zero point of the standard air pressure correction sensor assembly.

In some embodiments, the intracranial probe further comprises a flexible support, an edge of the flexible support is flush with the table top and is in contact with the pressure sensor, the temperature sensor is arranged on one side of the flexible support opposite to the window, and the middle part of the flexible support extends towards the inside of the accommodating chamber and isolates the pressure sensor from the temperature sensor.

In some embodiments, a channel is formed between the middle of the flexible support and the back of the pressure sensor, the channel forming an airway in communication with standard air pressure, the airway and intracranial fluid forming a pressure differential across the pressure sensor.

In some embodiments, the proximal end of the housing is provided with a through bore in communication with the airway, the through bore and the airway forming a closed channel within the housing, the closed channel configured to mate with and communicate with standard air pressure through the intracranial pressure catheter.

In some embodiments, the leads of the temperature sensor and/or the leads of the pressure sensor extend to the channel and through the intracranial pressure catheter to the exterior of the intracranial probe.

In some embodiments, the pressure sensor is provided in a plate-like structure with an edge lying to the table top by an edge of the flexible support.

In some embodiments, the temperature sensor is arranged in a columnar structure, and the bottom of the accommodating chamber is provided with a flexible cylindrical supporting frame matched with the columnar structure.

In some embodiments, the intracranial probe further comprises a sensing coating that senses intracranial pressure and temperature, the sensing coating covering the window and sealing the pressure sensor and the temperature sensor. .

A second aspect of the present utility model provides an intracranial detection assembly, comprising: an intracranial probe, the intracranial probe being in accordance with the first aspect of the utility model; the catheter assembly comprises a drainage tube and an intracranial pressure catheter, the intracranial probe is arranged in the drainage tube, the drainage tube is provided with a drainage port corresponding to a window of the intracranial probe, and the intracranial pressure catheter is arranged in the drainage tube and is communicated with a through hole of the intracranial probe.

In some embodiments, the intracranial probe is disposed at a distal end of the drainage tube, the drainage port is disposed at a tube wall of the distal end, and a drainage hole in communication with the window is further disposed on a side wall of the middle section of the drainage tube.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic diagram of an assembly structure of an intracranial detection assembly according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a disassembled structure of the intracranial detection assembly shown in FIG. 1;

FIG. 3 is a partially exploded view of the intracranial detection assembly of FIG. 1;

FIG. 4 is a schematic diagram of the configuration of an intracranial probe in the intracranial detection assembly shown in FIG. 3;

FIG. 5 is a schematic view of the configuration of the housing in the intracranial probe shown in FIG. 4.

Wherein, the reference numerals are as follows:

100. an intracranial detection assembly;

10. an intracranial probe; 11. a housing; 111. a window; 112. a housing chamber; 113. a step structure; 114. a through hole; 12. a pressure sensor; 121. a circuit board; 122. a pressure sensing diaphragm; 123. a pressure sensing line; 13. a temperature sensor; 131. a temperature sensing line; 14. a flexible support; 15. a flexible cylindrical support frame;

20. a drainage tube; 21. a distal end; 211. a drainage port; 22. a middle section; 221. drainage holes; 23. a proximal end; 24. a drain valve;

30. an intracranial pressure catheter;

40. and (5) a terminal.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the detection of the intracranial signal by the intracranial probe according to the present utility model is only a preferred embodiment and is not limited to the application range of the intracranial probe, for example, the intracranial probe according to the present utility model can be applied to other human tissues such as blood vessels, and the adjustment does not deviate from the application range of the intracranial probe according to the present utility model. In addition, the pressure sensor and the temperature sensor are only preferred embodiments of the sensor assembly according to the embodiments of the present utility model, and the type of the sensor assembly is not limited, and the sensor assembly may be any sensing element capable of sensing changes in external boundary environments (such as pressure, temperature, pH, etc.) and generating an electrical signal output, which will not be described in detail herein.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are inclusive and therefore specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.

Although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. In addition, in the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

For ease of description, spatially relative terms, such as "inner," "side wall," "facing," "back," "flush," "middle," "back," "face," "proximal," "outer," "edge," "end," "length," "distal," "middle," and the like, may be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the mechanism in use or operation in addition to the orientation depicted in the figures. For example, if the mechanism in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The mechanism may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

Intracranial pressure refers to the pressure of the intracranial contents on the wall of the cranial cavity, and consists of two factors, namely hydrostatic pressure and pressure of blood vessel tension fluctuation, and maintains relatively stable intracranial pressure through physiological regulation, wherein the total amount of the intracranial three contents of brain tissue, brain tissue and blood is relatively constant under normal physiological conditions, and the total volume of the intracranial three contents of brain tissue, cerebrospinal fluid and blood is nearly constant under normal physiological conditions, so that the regulation of the intracranial pressure in a normal range becomes balance between cerebral blood flow and cerebrospinal fluid, wherein one volume is increased, and the other volume is reduced to coordinate. An increase in intracranial pressure can be caused when some cause increases in intracranial content that cannot be compensated for by other decreases. There are four common conditions leading to increased intracranial pressure: increased brain tissue, increased cerebrospinal fluid, increased intracranial blood volume, and new intracranial appearance.

The intracranial pressure increase has three main signs: headache, vomiting, and disk edema. The increased intracranial pressure is of a longer duration and can lead to a range of physiological dysfunction and pathological changes. When the intracranial pressure is increased to a certain level, the cerebral blood flow can be seriously influenced, cerebral ischemia and anoxia are caused to generate cerebral edema, the intracranial pressure is further increased, and cerebral tissue is pressed and shifted to generate cerebral hernia; the hypothalamus can be pressed or destroyed to cause autonomic nerve dysfunction, and acute digestive tract ulcer, perforation, hemorrhage, etc. can be caused. Severe intracranial pressure increases are also frequently associated with complications such as pulmonary edema. If cerebral tissue deformation affects cerebral vessels, an increase in intracranial pressure exceeding 3.33kPa (25 mmHg) can cause serious consequences and even brain death. Intracranial pressure and intracranial temperature are important parameter indexes for craniotomy, intracranial pressure (intracranial pressure, ICP) is an important index reflecting physiological states of a Central Nervous System (CNS) and intracranial hemodynamics, and monitoring of the intracranial pressure has high value in treatment of patients with severe neurosis, and is widely applied to diseases such as craniocerebral trauma, intracranial hemorrhage, craniocerebral tumor, intracranial infection, hydrocephalus and the like. Intracranial monitoring includes both invasive and non-invasive monitoring, and although non-invasive monitoring has been greatly developed in recent years, accuracy is still low. Invasive intracranial pressure monitoring mainly includes transcatheter extracerebral drainage (external ventricular drainage, EVD), lumbar Puncture (LP), lumbar Drainage (LD), epidural and subdural pressure sensors, implantable microsensors, intraparenchymal probes, telemetry sensors, etc.

The following disadvantages exist in the invasive intracranial monitoring in the market:

1) The intracranial probe is oversized: the intracranial probe needs to go deep into brain tissues of a patient to carry out corresponding data measurement, and the needed wound is overlarge due to overlarge intracranial probe, so that secondary damage is easy to cause;

2) The intracranial probe comprises a temperature sensor and a pressure sensor, the intracranial probe penetrates into the cranium of a patient, the pressure and the temperature are measured through the pressure sensor and the temperature sensor, and the condition that zero drift is caused by measurement errors can occur due to unreasonable installation of the pressure sensor and the temperature sensor;

3) The intracranial probe of the patient needs to be placed in the cranium for a long time during cranium operation, the temperature sensor can continuously measure the temperature for a long time to easily cause the drift of the zero point of the measured temperature, the measurement is inaccurate, the pressure sensor surface is subjected to pressure for a long time, and the pressure film is easily deformed to cause the drift of the zero point of the pressure, so that the measurement error is increased.

The utility model provides a method for matching the step structure of the inner wall of the shell of the intracranial probe with the pressure sensor and the temperature sensor to meet the requirement of the pressure sensor and the temperature sensor on the sensing position, thereby improving the detection reliability and the detection stability of the intracranial probe and being beneficial to the development of the intracranial probe to the small-sized integration direction.

As shown in fig. 1 to 5, a first aspect of the present utility model provides an intracranial probe 10, comprising a housing 11 and a sensor assembly (described in detail below), the housing 11 is provided with a window 111, an accommodating chamber 112 communicating with the window 111 is provided inside the housing 11, and a step structure 113 is formed on a side wall of the accommodating chamber 112, the sensor assembly is provided in the accommodating chamber 112, the sensor assembly comprises a pressure sensor 12 and a temperature sensor 13, the pressure sensor 12 is placed on a table top of the step structure 113 and faces the window 111, the temperature sensor 13 is provided inside the housing 11 to isolate a closed cavity in the cranium fluid, and a passage (a position of the accommodating chamber 112) between the pressure sensor 12 and the temperature sensor 13 and communicating with a standard air pressure is formed on a side wall of the step structure 113.

In this embodiment, the intracranial probe 10 of the present utility model integrates the pressure sensor 12 and the temperature sensor 13 inside the intracranial probe 10, and cooperates with the pressure sensor 12 and the temperature sensor 13 through the step structure 113, so that the pressure sensor 12 can face the window 111 through the table surface of the step structure 113 to achieve the purpose of sensing intracranial pressure in the front direction, and the step structure 113 forms a closed cavity inside the housing 11 for isolating intracranial fluid and accommodating the temperature sensor 13, and the closed cavity can be formed in the step structure 113 and also can be formed in the inner wall of the housing 11, thereby achieving the purpose of blocking direct contact between the temperature sensor 13 and intracranial fluid, and being beneficial to miniaturization development of the intracranial probe 10.

Specifically, as will be appreciated by those skilled in the art, when the intracranial probe 10 is extended into the cranium, a portion of the intracranial fluid is located around the housing 11 of the intracranial probe 10, and the intracranial probe 10 achieves the purpose of detecting the intracranial pressure by detecting the pressure of the fluid around the intracranial probe 10. Since the housing 11 is provided with the window 111, most of the intracranial fluid around the housing 11 flows to the accommodating chamber 112 of the housing 11 along the direction facing the window 111, in order to enable the pressure sensing to accurately detect the intracranial fluid pressure flowing to the window 111, the embodiment of the utility model proposes to provide the step structure 113 on the side wall of the accommodating chamber 112, and to provide the pressure sensor 12 facing the window 111 by providing the pressure sensor 12 on the table top of the step structure 113, so as to achieve the purpose of sensing the intracranial fluid pressure in the front side, and improve the sensing accuracy of the pressure sensor 12.

In addition, not only can the installation space of the temperature sensor 13 be formed between the side walls of the two sides of the step structure 113, but also a channel communicated with standard air pressure can be formed between the pressure sensor 12 and the temperature sensor 13, the standard air pressure comprises external atmosphere or standard air pressure equipment, and the like, and the zero point of the sensor assembly is corrected through the standard air pressure, so that the phenomenon that the zero point drift of the sensor assembly occurs is reduced. Specifically, the intracranial probe 10 needs to be placed in the cranium during the cranium operation of the patient, the temperature sensor 13 continuously measures the temperature for a long time easily causes the zero point of the measured temperature to drift, the measured result of the temperature sensor 13 is distorted, the surface of the pressure sensor 12 is easily deformed due to the long-time intracranial pressure, the pressure film of the pressure sensor 12 is deformed, the zero point of the measured pressure of the pressure sensor 12 is shifted, and the measured result of the pressure sensor 12 is distorted. The embodiment of the utility model provides that the zero point of the measured temperature of the temperature sensor 13 is corrected by the standard air pressure, and the zero point of the measured pressure of the pressure sensor 12 is corrected, so that the zero point of the measured temperature of the temperature sensor 13 is always consistent with the standard air pressure temperature, the zero point of the measured pressure of the pressure sensor 12 is consistent with the standard air pressure temperature, and the measurement reliability and accuracy of the pressure sensor 12 and the temperature sensor 13 are improved.

It should be noted that, the specific structure and the specific positional relationship of the casing 11, the pressure sensor 12, and the temperature sensor 13 of the intracranial probe 10 are not limited in the embodiments of the present utility model, because the application point of the present utility model is that the step structure 113 and the pressure sensor 12 and the temperature sensor 13 reach the reasonably designed assembling position, so as to reduce the measurement distortion phenomenon caused by the unreasonable assembling position of the pressure sensor 12 and the temperature sensor 13, and the channel of the step structure 113 is communicated with the standard air pressure to correct the measurement pressure zero point of the pressure sensor 12 and the measurement temperature zero point of the temperature sensor 13, so that the specific structure and the specific positional relationship of the casing 11, the pressure sensor 12, and the temperature sensor 13 of the intracranial probe 10 can be set in a rectangular structure, a columnar structure, or a ladder structure, for example, the specific positional relationship of the pressure sensor 12 and the temperature sensor 13 can be set in a sheet structure, a columnar structure, or a rectangular structure, and the specific positional relationship of the pressure sensor 12 and the temperature sensor 13 can be set in an up-down positional relationship, and a left-right positional relationship, and a positional relationship can also be set in a left-right positional relationship, which belongs to the protection scope of the embodiments of the present utility model.

The specific structure and specific positional relationship of the housing 11, the pressure sensor 12, and the temperature sensor 13 of the intracranial probe 10 according to the embodiment of the present utility model are described in detail below.

As shown in fig. 1-5, in some embodiments, the intracranial probe 10 further comprises a flexible support 14, the edge of the flexible support 14 is flush with the table top and contacts the pressure sensor 12, the temperature sensor 13 is disposed on the side of the flexible support 14 opposite to the window 111, and the middle of the flexible support 14 extends toward the interior of the accommodating chamber 112 and isolates the pressure sensor 12 from the temperature sensor 13.

In this embodiment, the flexible support 14 includes a silica gel support, and the flexible support 14 may be configured to be similar to a channel steel, two sides of the flexible support 14 are flush with a table surface of the step structure 113, so as to achieve the effects of flexibly supporting and installing the pressure sensor 12, reduce the phenomenon that the table surface of the step structure 113 is hard-contacted with the pressure sensor 12 to damage the pressure sensor 12, and embed the temperature sensor 13 in the middle of the flexible support 14, so that the temperature sensor 13 is located at one side of the flexible support 14 opposite to the window 111, not only can the purpose of stabilizing the temperature sensor 13 be achieved, but also the purpose of isolating the pressure sensor 12 from the temperature sensor 13 can be achieved, the phenomenon that heat of the pressure sensor 12 is transferred to the temperature sensor 13 is reduced, and the flexible support 14 can transfer heat of intracranial fluid around the intracranial probe 10 to the temperature sensor 13, so as to achieve the purpose that the temperature sensor 13 senses intracranial temperature.

It should be noted that, the flexible support 14 is configured as a silica gel support similar to a channel, but the preferred embodiment of the present utility model is not limited to the material and shape of the flexible support 14, for example, in other embodiments, the flexible support 14 may be configured as a bio-hydrogel support similar to a tile, and the structure and the material of the flexible support 14 can achieve the purpose of integrating the pressure sensor 12 and the temperature sensor 13, which is beneficial to the miniaturization development of the intracranial probe 10, so the adjustment of the structure and the material of the flexible support 14 is also included in the protection scope of the embodiment of the present utility model.

In some embodiments, a channel is formed between the middle of flexible support 14 and the back of pressure sensor 12, the channel forming an airway in communication with standard air pressure, the airway creating a pressure differential with intracranial fluid across pressure sensor 12.

In this embodiment, the pressure sensor 12 includes a circuit board 121 and a pressure sensing diaphragm 122 disposed on the circuit board 121, the circuit board 121 is configured as a plate structure, the circuit board 121 is provided with a sensing port communicated with the air passage, the pressure sensing diaphragm 122 is disposed on the sensing port, the front surface of the pressure sensing diaphragm 122 bears intracranial pressure of intracranial fluid, the back surface of the pressure sensing diaphragm 122 bears external atmospheric pressure, the atmospheric pressure is taken as a zero point for measuring pressure, and the difference between the intracranial pressure and the atmospheric pressure borne by the pressure sensing diaphragm 122 is the intracranial pressure detected by the pressure sensor 12.

In some embodiments, proximal end 23 of housing 11 is provided with a throughbore 114 in communication with the airway, throughbore 114 and the airway forming a closed channel within housing 11 configured to mate with intracranial pressure catheter 30 and communicate with standard air pressure via intracranial pressure catheter 30.

In this embodiment, the through hole 114 is sized to fit the size of the airway, and the proximal end 23 of the housing 11 is provided with a baffle disposed around the through hole, and the intracranial pressure catheter 30 is disposed in communication with the through hole 114 and sealingly interfaces with the baffle, thereby reducing leakage between the intracranial pressure catheter 30 and the through hole.

In addition, the intracranial pressure catheter 30 is arranged to be distributed along the implantation path of the intracranial probe 10 and extend out of the human body at the proximal end 23 of the implantation path, so as to achieve the purpose of communicating with standard air pressure, and the through hole 114 and the air passage form a closed channel in the shell 11, so that the influence of the intracranial fluid flowing into the shell 11 on the normal operation of the pressure sensor 12 and the temperature sensor 13 can be reduced, and the detection precision of the pressure sensor 12 and the temperature sensor 13 can be improved.

As shown in FIGS. 3 and 4, in some embodiments, the leads of temperature sensor 13 and/or the leads of pressure sensor 12 extend to the passageway and through intracranial pressure catheter 30 to the exterior of intracranial probe 10.

In this embodiment, the temperature sensor 13 is provided with a temperature sensing wire 131, the temperature sensing wire 131 is welded at the temperature sensor 13 in a hot-pressing manner and bent into a n shape, and then the temperature sensing wire 131 extends to the outside of the intracranial probe 10 through the intracranial pressure catheter 30 to be connected with the terminal 40 of the intracranial detection assembly 100, and the temperature sensor 13 transmits the sensed intracranial temperature to the terminal 40 of the intracranial detection assembly 100 through the temperature sensing wire 131, so that the medical staff can conveniently check and analyze the intracranial temperature.

Similarly, the pressure sensing diaphragm 122 is provided with a pressure sensing wire 123, the pressure sensing wire 123 is welded at the pressure sensing diaphragm 122 in a hot-pressing mode and bent into a n shape, then the pressure sensing diaphragm 122 extends to the outside of the intracranial probe 10 through the intracranial pressure conduit 30 to be connected with the terminal 40 of the intracranial detection assembly 100, the sensed intracranial pressure is transmitted to the terminal 40 of the intracranial detection assembly 100 through the pressure sensing wire 123 by the pressure sensing diaphragm 122, and the intracranial pressure can be conveniently checked and analyzed by medical staff.

Further, the wires of the temperature sensor 13 and/or the wires of the pressure sensor 12 extend to the channel, so that the utilization rate of the channel can be improved, and an additional wire slot is not required to be arranged in the intracranial probe 10, and the processing difficulty of the intracranial probe 10 is reduced.

As shown in fig. 3 and 4, in some embodiments, the pressure sensor 12 is provided as a plate-like structure with an edge lying to the table top by an edge of the flexible support 14.

In this embodiment, the pressure sensor 12 includes a circuit board 121 and a pressure sensing diaphragm 122 disposed on the circuit board 121, the circuit board 121 is configured as a plate structure, the table top of the step structure 113 is configured to be flush with the window 111 of the intracranial probe 10, and the circuit board 121 is flatly placed on the table top of the step structure 113, so that the pressure sensing diaphragm 122 can sense the intracranial pressure at the window 111 of the intracranial probe 10 in a frontal manner, and measurement stability and accuracy of the pressure sensing diaphragm 122 are improved. Further, the flexible support 14 can play a role in buffering the circuit board 121, and the risk of damaging the electronic control board due to hard contact between the circuit board 121 and the step structure 113 is reduced.

As shown in fig. 3 and 4, in some embodiments, the temperature sensor 13 is provided in a columnar structure, and the bottom of the accommodating chamber 112 is provided with a flexible cylindrical support 15 that mates with the columnar structure.

In this embodiment, the temperature sensor 13 is configured to have a columnar structure, so that the detection range of the temperature sensor 13 can be increased, for example, the temperature sensor 13 can detect the intracranial temperature by 360 °, and meanwhile, the flexible cylindrical support 15 can support and buffer the temperature sensor 13, so as to reduce the phenomenon that the temperature sensor 13 is damaged by hard contact between the temperature sensor 13 and the housing 11.

Specifically, in the process of assembling the intracranial probe 10, the flexible cylindrical support 15 is firstly placed at the bottom of the accommodating chamber 112, then the temperature sensor 13 with a columnar structure is placed on the flexible cylindrical support 15, then silica gel is poured on the temperature sensor 13, the flexible cylindrical support 15 and the step structure 113, after the silica gel is solidified, the flexible support 14 for connecting the step structure 113 and the temperature sensor 13 can be formed, the purposes of sealing and fixing the temperature sensor 13 are achieved through the flexible support 14, at this time, the pressure sensor 12 can be placed on the table surface of the step structure 113 and contacted with the edge of the flexible support 14, and the purpose of supporting the pressure sensor 12 is achieved through the table surface of the step structure 113 and the edge of the flexible support 14.

Further, the end of the temperature sensor 13 along the length direction extends out of the end of the pressure sensor 12 along the length direction and faces the window 111, so that the intracranial fluid heat around the intracranial probe 10 can be directly transferred to the temperature sensor 13 through the silica gel, and the measurement sensitivity of the temperature sensor 13 is improved.

As shown in FIGS. 3 and 4, in some embodiments, the intracranial probe 10 further includes a sensing coating (not shown) that senses intracranial pressure and temperature, the sensing coating covering the window 111 and sealing the pressure sensor 12 and the temperature sensor 13.

In this embodiment, the sensing coating is applied to the surface of the circuit board 121 to protect the circuit board 121 and the pressure sensing diaphragm 122, so as to prevent the corrosion of the circuit board 121 and the pressure sensing diaphragm 122 caused by the human tissue fluid components, thereby affecting the measurement accuracy. Further, the induction coating has the characteristics of high dielectric strength, good water vapor permeation resistance and the like, and materials such as Parylene, epoxy resin, organic silicon resin and the like can be selected, and the induction coating is performed after the hot pressing process is finished, so that the induction coating can transmit the pressure and the temperature of intracranial fluid to the pressure sensor 12 and the temperature sensor 13, and the influence of the induction coating on the measurement precision of the pressure sensor 12 and the temperature sensor 13 is reduced.

As shown in fig. 1 to 5, the second aspect of the present utility model provides an intracranial detection assembly 100, the intracranial detection assembly 100 comprising an intracranial probe 10 and a catheter assembly, the intracranial probe 10 being the intracranial probe 10 according to the first aspect of the present utility model, the catheter assembly comprising a drainage tube 20 and an intracranial catheter 30, the intracranial probe 10 being disposed inside the drainage tube 20, the drainage tube 20 being provided with a drainage port 211 corresponding to a window 111 of the intracranial probe 10, the intracranial catheter 30 being disposed inside the drainage tube 20 and communicating with a through hole of the intracranial probe 10.

In this embodiment, the drainage tube 20 has a certain rigidity, and can give the internal pressure sensor 12 and the temperature sensor 13 good protection, prevent the whole intracranial probe 10 from failure caused by the impact and collision of external stress, etc., and the drainage tube 20 should be made of biocompatible materials such as high molecular plastics, titanium alloy, stainless steel, ceramics, etc. The intracranial probe 10 needs to pass through the surface layer of the human body to reach the internal tissues when being implanted, in order to prevent injury to the human tissues from increasing the pain of a patient, the drainage tube 20 should be made into a smooth curved surface without the existence of edges and corners, and specifically, the distal end 21 of the drainage tube 20 is provided as an arc-shaped shell. A window 111 is formed in the middle of the drainage tube 20, and the window 111 is used for enabling the sensing surface of the pressure sensor 12 to be in direct contact with the external environment so as to ensure the measurement accuracy.

As shown in fig. 1-5, in some embodiments, the intracranial probe 10 is disposed at the distal end 21 of the drainage tube 20, the drainage port 211 is disposed at the wall of the distal end 21, and the sidewall of the middle section 22 of the drainage tube 20 is further provided with a drainage hole 221 in communication with the window 111.

In this embodiment, the drainage port 211 and the drainage hole 221 are used for drainage of the intracranial probe 10 at the same time, so that the flow stability of the fluid at the intracranial probe 10 can be improved, and the phenomenon that the intracranial fluid acts on the intracranial probe 10 in a concentrated way at the drainage port 211 and causes detection distortion is reduced.

Further, the intracranial detection assembly 100 further comprises a drainage valve 24, wherein the drainage valve 24 is arranged at the proximal end 23 of the drainage tube 20 and is communicated with the inner space of the drainage tube 20, and is used for draining intracranial fluid in the drainage tube 20 out of human tissues, so that the purpose of regulating intracranial pressure is achieved.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. An intracranial probe, comprising:

the shell is provided with a window, an accommodating chamber communicated with the window is arranged in the shell, and a step structure is formed on the side wall of the accommodating chamber;

the temperature sensor is arranged in a closed cavity of the intracranial fluid isolated by the inside of the shell, and the side wall of the step structure forms a channel which is positioned between the pressure sensor and the temperature sensor and communicated with standard air pressure.

2. The intracranial probe as recited in claim 1, further comprising a flexible support having an edge flush with the table top and in contact with the pressure sensor, the temperature sensor being disposed on a side of the flexible support opposite the window, a middle portion of the flexible support extending inwardly of the housing and isolating the pressure sensor from the temperature sensor.

3. The intracranial probe as recited in claim 2, wherein the passageway is formed between the middle portion of the flexible support and the back portion of the pressure sensor, the passageway forming an airway in communication with standard air pressure, the airway and intracranial fluid forming a pressure differential across the pressure sensor.

4. An intracranial probe as claimed in claim 3, wherein the proximal end of the housing is provided with a through bore in communication with the airway, the through bore and the airway forming a closed channel within the housing, the closed channel being arranged to mate with an intracranial pressure catheter and communicate with standard air pressure via the intracranial pressure catheter.

5. The intracranial probe as recited in claim 4, wherein the wire of the temperature sensor and/or the wire of the pressure sensor extends to the passageway and through the intracranial pressure catheter to the exterior of the intracranial probe.

6. The intracranial probe according to any one of claims 2 to 5, wherein the pressure sensor is arranged in a plate-like structure, the edge of which lies flat to the table top by the edge of the flexible support.

7. The intracranial probe as recited in any one of claims 1 to 5, wherein the temperature sensor is provided in a cylindrical configuration, and the bottom of the housing chamber is provided with a flexible cylindrical support frame cooperating with the cylindrical configuration.

8. The intracranial probe as recited in any one of claims 1 to 5, further comprising a sensing coating to sense intracranial pressure and temperature, the sensing coating covering the window and sealing the pressure sensor and the temperature sensor.

9. An intracranial detection assembly, the intracranial detection assembly comprising:

an intracranial probe, the intracranial probe being according to any of claims 1 to 8;

the catheter assembly comprises a drainage tube and an intracranial pressure catheter, the intracranial probe is arranged in the drainage tube, the drainage tube is provided with a drainage port corresponding to a window of the intracranial probe, and the intracranial pressure catheter is arranged in the drainage tube and is communicated with a through hole of the intracranial probe.

10. The intracranial detection assembly as recited in claim 9, wherein the intracranial probe is disposed at a distal end of the drainage tube, the drainage port is disposed at a wall of the distal end, and a drainage aperture in communication with the window is further disposed on a side wall of the middle section of the drainage tube.