Head-mounted non-invasive intracranial pressure monitor adaptive to skull flap-removed patient
By utilizing the retractable detection components and spherical clamping strip design of the head-mounted non-invasive intracranial pressure monitor, combined with the air control box and dual alarm system, the problem of intracranial pressure monitoring adaptation for patients undergoing craniotomy has been solved, achieving non-invasive, safe, and accurate intracranial pressure monitoring, which is suitable for patients in the postoperative recovery period.
Patent Information
- Application Number
- CN202511443819.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2025-12-16
AI Technical Summary
In the current technology, intracranial pressure monitoring for patients undergoing craniotomy faces challenges in adapting non-invasive monitoring devices, while invasive monitoring carries risks of infection and bleeding. Traditional non-invasive devices may cause brain tissue damage due to difficulty in obtaining signals in the bone window area or by directly compressing the area.
A head-mounted non-invasive intracranial pressure monitor was designed, which uses a retractable detection component and a spherical clamping strip, combined with a pneumatic control box and a dual alarm system, to achieve flexible fit and precise pressure control of the soft tissue of the bone window, avoid brain tissue damage, and adapt to different head shapes and bone window positions.
It enables non-invasive, safe, and accurate intracranial pressure monitoring for patients undergoing craniotomy, reducing the risk of infection and bleeding, improving monitoring accuracy and patient comfort, and is suitable for long-term postoperative monitoring, while supporting remote data upload.
Smart Images
Figure CN121129232A_ABST
Abstract
Description
Technical Field
[0001] This invention mainly relates to the technical field of neurosurgical monitoring equipment, specifically a head-mounted non-invasive intracranial pressure monitor suitable for patients undergoing craniotomy. Background Technology
[0002] In the field of neurosurgery, decompressive craniectomy is a key procedure for relieving acute or chronic intracranial hypertension and has been widely used in clinical practice. This surgery releases intracranial pressure and protects brain tissue by removing part of the skull, but postoperative monitoring of intracranial pressure (ICP) in patients faces many challenges. Currently, commonly used methods for monitoring intracranial pressure (ICP) in clinical practice have significant limitations: Traditional invasive ICP monitoring, while providing relatively accurate values, requires penetrating the skull, posing a 10%–20% risk of infection and serious complications such as intracranial hemorrhage. Furthermore, the procedure relies on specialized medical personnel, making it difficult to implement in primary healthcare institutions. In addition, some clinical staff still rely on empirical judgment based on palpation of the bone window, a method that is highly subjective, prone to error, and easily delays diagnosis. Existing non-invasive monitoring devices also face compatibility challenges: head-mounted devices based on technologies such as near-infrared spectroscopy rely on the stable support of the intact skull structure for detection, while the bone window area in patients undergoing craniotomy is only covered by soft tissue. The elasticity of this tissue differs significantly from that of the skull, making it impossible for such devices to acquire effective signals in this area. Furthermore, monitoring devices using rigid sensors that directly compress the craniotomy area may cause brain tissue damage due to concentrated local pressure, further increasing the patient's risk. Therefore, there is an urgent need for an intracranial pressure monitoring device that can achieve non-invasive monitoring and is adapted to the soft tissue characteristics of the bone window area for patients undergoing craniotomy, in order to fill the existing technological gap. Summary of the Invention
[0003] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the present invention mainly provides a head-mounted non-invasive intracranial pressure monitor suitable for patients undergoing craniotomy, in order to solve the technical problems mentioned in the background.
[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A head-mounted non-invasive intracranial pressure monitor suitable for patients undergoing craniectomy includes a head-mounted structure, wherein the head-mounted structure includes a central plate and several clamping strips connected to the central plate, and each clamping strip is equipped with several detection components, wherein the detection components consist of telescopic tubes and electrode patches; The head-mounted structure is equipped with a control box, and a connecting component is provided between the control box and the head-mounted structure. The control box contains an air control box, and an air outlet is provided on one side of the air control box. The air outlet is connected to each telescopic tube via a flexible hose. The pneumatic control box has a squeezing piston and a driving piston that slide inside. A squeezing spring connects the squeezing piston and the driving piston. A through ring is provided on the driving piston. A first control button is provided inside the through ring. A detection sleeve is provided on one side of the pneumatic control box. A shaft is provided inside the detection sleeve. A connecting belt is installed on the shaft by a spiral spring. The other end of the connecting belt is connected to the extrusion piston. A second control button is provided inside the detection sleeve.
[0005] Preferably, the control box is provided with a partition, the pneumatic control box is located on one side of the partition, the other side of the partition accommodates a data processing module, a power supply module, and a wireless transmission module that are electrically connected to the electrode patches, and a display module is provided on the surface of the control box.
[0006] Preferably, a plurality of the clamping strips are located on the same spherical surface, and the central angle of the spherical surface is greater than 180°. The center plate and the clamping strips are connected by a snap-fit structure, which includes a buckle and a slot that cooperate with each other.
[0007] Preferably, the connecting assembly includes a connector and multiple arc-pressure plates, the tops of which are connected to an annular plate, which is fitted onto the connector; the connector is composed of a threaded tube and a nut, the inner and outer sides of the threaded tube are threaded, and an end edge is fixed at the bottom of the threaded tube, which is bolted to a center plate; the nut is threaded onto the outside of the threaded tube; a screw is provided at the lower end of the control box, and the screw is threadedly connected to the inside of the nut.
[0008] Preferably, the number of arc-pressing plates is equal to the number of clamping bars, and they are positioned directly above the clamping bars. A slot is provided on the upper side of the clamping bars, the bottom of the arc-pressing plate is inserted into the slot, and the annular plate is fitted onto the threaded tube.
[0009] Preferably, a compression rod adapted to and opposite to the through ring is installed on one side of the compression piston, and a drive screw is threadedly connected to one side of the pneumatic control box, with one end of the drive screw connected to the drive piston.
[0010] Preferably, a movable frame slides inside the detection sleeve, a threaded limiting screw is provided on the movable frame, and the shaft is mounted on the movable frame. The connecting belt and the driving piston slide in contact, and a plurality of limiting springs are connected between the movable frame and the detection sleeve.
[0011] Preferably, the surface of the gas control box is provided with two alarms, and the two alarms are respectively electrically connected to the first control button and the second control button.
[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This invention achieves flexible fitting of the skull defect area through a retractable detection component and a spherical clamping strip. The retractable tube can adaptively adjust its length according to the shape of the soft tissue of the bone window, avoiding pressure on the brain tissue from rigid contact; the spherical structure formed by the clamping strip can stably wrap the head, ensuring that the electrode patch can fit tightly around the bone window and the intact skull area, solving the technical bottleneck of traditional non-invasive devices that rely on the intact skull, accurately adapting to the bone flap area, and breaking through structural limitations.
[0013] (2) This invention eliminates the risks of infection and bleeding associated with invasive procedures. It collects intracranial pressure-related physiological signals (such as changes in cerebral blood flow and impedance) through electrode patches, and generates ICP values through data processing modules. The entire monitoring process does not require penetration of the skin or skull, significantly improving patient safety and comfort. It is especially suitable for patients who need long-term monitoring during the postoperative recovery period, achieving non-invasive monitoring and reducing medical risks. (3) This invention utilizes a pressure feedback system consisting of a pneumatic control box and dual control buttons to achieve precise control of the electrode patch pressure: when the squeezing rod triggers the first control button, it indicates that the patch has been initially attached; when the moving frame touches the second control button, it indicates that the pressure has reached the safe threshold (causing only slight deformation of the soft tissue). This dual alarm mechanism can avoid signal distortion caused by insufficient pressure and prevent brain tissue damage caused by excessive pressure, ensuring a balance between monitoring accuracy and patient safety. (4) The central plate and the clamping strips of this invention are connected by a snap-fit structure, which allows for flexible adjustment of the number and angle of the clamping strips according to the patient's head shape and bone window position; the arc pressure plate and threaded tube design in the connecting assembly allow for height adjustment of the control box to accommodate patients with different head circumferences. In addition, the wireless transmission module supports real-time uploading of monitoring data to the terminal device, facilitating remote monitoring by medical staff and improving the convenience of clinical use. The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the headgear structure of the present invention; Figure 2 This is a schematic diagram of the head-mounted structure of the present invention (without the control box); Figure 3 This is a schematic diagram of the telescopic tube and electrode patch of the present invention; Figure 4 This is a schematic diagram of the clamping strip of the present invention; Figure 5 This is a schematic diagram of the central plate of the present invention; Figure 6 This is a schematic diagram of the connection component of the present invention; Figure 7 This is a schematic diagram of the arc pressure plate of the present invention; Figure 8 This is a schematic diagram of the connector of the present invention; Figure 9 This is a schematic diagram of the pneumatic control box of the present invention; Figure 10 This is a schematic diagram of the internal structure of the gas control box of the present invention; Figure 11 This is a schematic diagram of the internal structure of the detection sleeve of the present invention.
[0015] 1. Headgear structure; 11. Clamping bar; 112. Slot; 12. Detection assembly; 121. Telescopic tube; 122. Electrode patch; 13. Center plate; 131. Snap-fit structure; 2. Connecting assembly; 21. Connector; 211. Threaded pipe; 212. End edge; 213. Nut; 22. Arc pressure plate; 221. Annular plate; 3. Control box; 40. Detection sleeve; 401. Movable frame; 402. Limiting screw; 403. Connecting belt; 404. Limiting spring; 405. Second control button; 50. Pneumatic control box; 501. Compression piston; 502. Drive piston; 503. Air outlet; 504. Alarm; 505. Compression spring; 506. Through ring; 507. Drive screw; 508. Compression rod. Detailed Implementation
[0016] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.
[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0019] Example 1: Please refer to the appendix carefully. Figure 1-3 As shown, a head-mounted non-invasive intracranial pressure monitor suitable for patients undergoing craniectomy includes a head-mounted structure 1. The head-mounted structure 1 includes a central plate 13 and several clamping strips 11 connected to the central plate 13. Each clamping strip 11 is equipped with several detection components 12, each consisting of a telescopic tube 121 and an electrode patch 122. A control box 3 has a partition inside, with a pneumatic control box 50 located on one side of the partition. The other side of the partition houses a data processing module, a power supply module, and a wireless transmission module electrically connected to the electrode patches 122. A display module is provided on the surface of the control box 3. The data processing module, power supply module, wireless transmission module, and power supply module are existing mature technologies. Their internal control circuits can be implemented by simple programming by those skilled in the art and are common knowledge in the field. Since they are only used and not modified, the control methods and circuit connections will not be described in detail.
[0020] Example 2: Based on Example 1, please refer to the appendix for details. Figure 1-8 As shown, the head-mounted structure 1 is equipped with an adjustment box 3, and a connecting component 2 is provided between the adjustment box 3 and the head-mounted structure 1. Several clamping strips 11 are located on the same spherical surface, and the central angle of this spherical surface is greater than 180°. The center plate 13 and the clamping strips 11 are connected by a snap-fit structure 131, which includes mutually cooperating buckles and slots. The connection between the center plate 13 and the clamping strips 11 via the snap-fit structure 131 (including mutually cooperating buckles and slots) facilitates disassembly and replacement. When worn, the spherical shell formed by the center plate 13 and the clamping strips 11 is directly fitted onto the head, and the deformation recovery characteristics of the clamping strips 11 ensure a stable and snug fit.
[0021] The connecting assembly 2 includes a connector 21 and multiple arc-pressure plates 22. The tops of the multiple arc-pressure plates 22 are connected to an annular plate 221, which is fitted onto the connector 21. The connector 21 consists of a threaded tube 211 and a nut 213. The threaded tube 211 has threaded structures on both its inner and outer sides, and an end edge 212 is fixed to the bottom of the threaded tube 211. The end edge 212 is bolted to the center plate 13. The nut 213 is threaded onto the outside of the threaded tube 211. The lower end of the control box 3 has a screw, which is threadedly connected to the inside of the nut 213. The clamping bar 11 is stably installed on the side of the center plate 13 and can be disassembled from the center plate 13 as needed.
[0022] The number of arc-pressure plates 22 is equal to the number of clamping bars 11, and they are positioned directly above the clamping bars 11. A slot 112 is provided on the upper side of each clamping bar 11, and the bottom of each arc-pressure plate 22 is inserted into the slot 112. The annular plate 221 is fitted onto the threaded tube 211. Rotating the nut 213 controls the raising and lowering of the annular plate 221; when the annular plate 221 descends, it forces the arc-pressure plates 22 to descend and press against the clamping bars 11, thereby ensuring the clamping bars 11 are stably installed relative to the center plate 13.
[0023] Example 3: Based on Example 2, please refer to the appendix for details. Figure 1-9 As shown, the control box 3 contains a pneumatic control box 50. An air outlet 503 is located on one side of the pneumatic control box 50, and the air outlet 503 is connected to each telescopic tube 121 via a flexible hose. A compression piston 501 and a drive piston 502 slide inside the pneumatic control box 50. A compression spring 505 connects the compression piston 501 and the drive piston 502. A through ring 506 is provided on the drive piston 502, and a first control button is located inside the through ring 506. A compression rod 508, adapted to and opposite to the through ring 506, is installed on one side of the compression piston 501. A drive screw 507 is threadedly connected to one side of the pneumatic control box 50, and one end of the drive screw 507 is connected to the drive piston 502. Two alarms 504 are provided on the surface of the pneumatic control box 50, one of which is electrically connected to the first control button.
[0024] Manually rotating the drive screw 507 causes it to push the drive piston 502 to move. At this time, the telescopic tube 121 inflates and extends, causing the electrode patch 122 to adhere to the patient's head. Therefore, as the drive piston 502 moves, the compression piston 501 also moves. The compression spring 505 slightly contracts and then stops contracting. The compression piston 501 forces the gas inside the pneumatic control box 50 into the telescopic tube 121, causing the telescopic tube 121 to inflate and extend, causing the electrode patch 122 to adhere to the patient's head. Afterward, as the drive piston 502 moves, the compression piston 501 stops moving, the compression spring 505 continues to contract, and the compression rod 508 enters the through ring 506 and touches the first control button, causing one of the alarms 504 to sound an alarm. At this time, the electrode patch 122 is attached to the patient's head, but only in contact with the patient's head, and the friction between them is negligible.
[0025] Example 4: Based on Example 1, please refer to the appendix for details. Figure 9-11 As shown, a detection sleeve 40 is provided on one side of the pneumatic control box 50. A shaft is provided inside the detection sleeve 40, and a connecting strap 403 is wound around the shaft by a spiral spring. The other end of the connecting strap 403 is connected to the compression piston 501. A second control button 405 is provided inside the detection sleeve 40. A movable frame 401 slides inside the detection sleeve 40. A threaded limiting screw 402 is provided on the movable frame 401, and the shaft is mounted on the movable frame 401. The connecting strap 403 and the drive piston 502 are in slidable contact. Several limiting springs 404 connect the movable frame 401 and the detection sleeve 40. Two alarms 504 are provided on the surface of the pneumatic control box 50. The other alarm 504 is electrically connected to the second control button 405.
[0026] After one of the alarms 504 sounds, the drive screw 507 stops rotating, and the limit screw 402 rotates, causing it to tightly press against the connecting belt 403. Then, the drive screw 507 rotates again. As the drive piston 502 moves, the compression spring 505 continuously contracts, increasing the pressure between the electrode patch 122 and the patient's head until the compression piston 501 moves. This causes the moving frame 401 to slide via the connecting belt 403, triggering the second control button 405, which then sounds the other alarm 504. If the piston 501 moves slightly when squeezed, it indicates that the electrode patch 122 has moved slightly. Since the electrode patch 122 is in contact with the patient's head, the slight movement of the electrode patch 122 indicates that the electrode patch 122 is slightly squeezing the patient's head, causing a slight deformation of the patient's head. At this time, the slight movement of the piston 501 reflects the slight squeezing of the head by the electrode patch 122 (only causing a slight deformation of the head). This pressure is the maximum safe value that does not affect the patency of endotracheal intubation and can avoid the electrode patch 122 being too loose and affecting the monitoring accuracy.
[0027] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.
Claims
1. A head-mounted non-invasive intracranial pressure monitor suitable for patients undergoing craniectomy, comprising a head-mounted structure (1), characterized in that: The headgear structure (1) includes a central plate (13) and several clamping strips (11) connected to the central plate (13). Each clamping strip (11) is equipped with several detection components (12). The detection components (12) are composed of telescopic tubes (121) and electrode patches (122). The head-mounted structure (1) is equipped with a control box (3), and a connecting component (2) is provided between the control box (3) and the head-mounted structure (1). The control box (3) is equipped with an air control box (50), and an air outlet (503) is provided on one side of the air control box (50). The air outlet (503) and each telescopic tube (121) are connected by a flexible hose. The pneumatic control box (50) has a compression piston (501) and a drive piston (502) sliding inside. A compression spring (505) is connected between the compression piston (501) and the drive piston (502). A through ring (506) is provided on the drive piston (502). A first control button is provided inside the through ring (506). A detection sleeve (40) is provided on one side of the pneumatic control box (50). A shaft is provided inside the detection sleeve (40). A connecting belt (403) is wound around the shaft by a spiral spring. The other end of the connecting belt (403) is connected to the extrusion piston (501). A second control button (405) is provided inside the detection sleeve (40).
2. The head-mounted non-invasive intracranial pressure monitor adapted for patients undergoing craniectomy according to claim 1, characterized in that: The control box (3) is equipped with a partition, the pneumatic control box (50) is located on one side of the partition, and the other side of the partition houses the data processing module, power supply module and wireless transmission module electrically connected to the electrode patch (122). The control box (3) is equipped with a display module.
3. A head-mounted non-invasive intracranial pressure monitor adapted for patients undergoing craniectomy according to claim 1, characterized in that: Several of the clamping strips (11) are located on the same spherical surface, and the central angle of the spherical surface is greater than 180°. The center plate (13) and the clamping strips (11) are connected by a snap-fit structure (131), which includes a buckle and a slot that cooperate with each other.
4. A head-mounted non-invasive intracranial pressure monitor adapted for patients undergoing craniectomy according to claim 3, characterized in that: The connecting assembly (2) includes a connector (21) and multiple arc pressure plates (22). The top of the multiple arc pressure plates (22) is connected to an annular plate (221), which is sleeved on the connector (21). The connector (21) is composed of a threaded tube (211) and a nut (213). The inner and outer sides of the threaded tube (211) are provided with threaded structures, and an end edge (212) is fixed at the bottom of the threaded tube (211). The end edge (212) is bolted to the center plate (13). The nut (213) is threaded on the outside of the threaded tube (211). The lower end of the control box (3) is provided with a screw, and the screw is threadedly connected to the inside of the nut (213).
5. A head-mounted non-invasive intracranial pressure monitor adapted for patients undergoing craniectomy according to claim 4, characterized in that: The number of the arc pressure plates (22) is equal to the number of the clamping bars (11), and they are positioned directly above the clamping bars (11). A slot (112) is provided on the upper side of the clamping bars (11). The bottom of the arc pressure plates (22) is inserted into the slot (112), and the annular plate (221) is fitted onto the threaded tube (211).
6. A head-mounted non-invasive intracranial pressure monitor adapted for patients undergoing craniectomy according to claim 1, characterized in that: The extrusion piston (501) has an extrusion rod (508) that is adapted to and opposite to the through ring (506) on one side, and a drive screw (507) is threadedly connected to one side of the pneumatic control box (50), with one end of the drive screw (507) connected to the drive piston (502).
7. A head-mounted non-invasive intracranial pressure monitor adapted for patients undergoing craniectomy according to claim 1, characterized in that: The detection sleeve (40) has a sliding frame (401) inside, and the sliding frame (401) is provided with a threaded limit screw (402), and the shaft is installed on the sliding frame (401). The connecting belt (403) and the driving piston (502) are in sliding contact. Several limit springs (404) are connected between the sliding frame (401) and the detection sleeve (40).
8. A head-mounted non-invasive intracranial pressure monitor adapted for patients undergoing craniectomy according to claim 1, characterized in that: The surface of the gas control box (50) is provided with two alarms (504), and the two alarms (504) are respectively connected to the first control button and the second control button (405).