Comb-shaped probe

Abstract

The utility model relates to a comb-shaped probe which comprises a group of emitting light sources and a multi-path detector, and a gyroscope is arranged at the top of the multi-path detector; and a band-pass optical filter is arranged at a probe at the bottom of the multi-path detector. According to the comb-shaped probe, a group of emitting light sources are adopted to calibrate a measurement channel for a multi-path detector in cooperation with a gyroscope, so that the measurement range is enlarged, and the operation time and the operation difficulty are reduced; due to the design of the comb-shaped probe, the use convenience is improved, and meanwhile, the influence of hair on a detection result is reduced; the influence of noise generated by natural light and ambient light can be filtered out in a limited mode.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a comb-shaped probe. Background Technology

[0002] Acute cerebral hemorrhage caused by traumatic brain injury frequently occurs in various scenarios, including traffic accidents, work in hazardous environments, violence, and sports. It is a significant cause of death and disability, and also a major public health issue. Patients with cerebral hemorrhage suffer multiple forms of physical and psychological torment. Early diagnosis, management, and treatment in cases of acute injury can minimize the impact of secondary damage and reduce the deterioration of the condition.

[0003] Currently, computed tomography (CT) scans are the gold standard for diagnosing and locating hematomas caused by cerebral hemorrhage. However, in emergency treatment of cerebral hemorrhage, patients need to be transferred to a hospital with a radiology department for CT scans, which is often difficult to achieve or requires a long transfer time in rural areas, natural disaster zones, or war zones. In cases where patients cannot be transferred due to accidents, CT-based diagnoses cannot be quickly completed, necessitating on-site clinical assessment by emergency personnel.

[0004] Cerebral hematoma typically corresponds to changes in tissue optical properties. Human tissue possesses a near-infrared spectral window; light passing through the tissue is not completely absorbed. Therefore, by measuring the change in light intensity after passing through the tissue, changes in tissue optical parameters can be reflected, and the distribution of various components within the tissue can be deduced. For hematoma detection, because the hemoglobin concentration within the hematoma is higher than that in the blood-containing brain tissue, the blood outside the blood vessels absorbs more near-infrared light, resulting in greater near-infrared light absorption.

[0005] The primary technology currently used is the US Infrascanner 1000 / 2000 brain scanner, which mainly comprises near-infrared spectroscopy-based sensors and data processing and display devices. The sensor includes a diode laser and a photodetector, coupled to the patient's scalp via two disposable optical guides, directly contacting the scalp. The light source and detector are 4.0 cm apart, allowing for absorbance measurement within a tissue volume of 2 cm wide and 2-3 cm deep. The data processing and display module controls laser power and adjusts detector gain, receives and sets hardware parameters, digitizes the detector signal, processes it, and displays it on the interface. Infrascanner compares the left and right sides of the brain in four different regions. The NIRS sensors are placed sequentially in the left and right frontal lobes, temporal lobes, parietal lobes, and occipital lobes of the head, recording the absorbance of light at the selected wavelength. Patient measurements can be completed within 2-3 minutes. For all hemorrhages (hemorrhage exceeding 3.5 mL) within the Infrascanner's detection range, the sensitivity is 94% and the specificity is 96%. In patients requiring surgical intervention, the device exhibits 100% sensitivity.

[0006] The main shortcomings of existing technologies include:

[0007] 1. Existing technologies generally use a dual-probe design, which has a limited acquisition range, is prone to missed detections, and has a long measurement time.

[0008] 2. In existing technologies, probe designs are generally based on light guides or optical fibers, and black hair can easily affect the measurement results.

[0009] 3. The current system uses a time-sharing measurement method, and ambient light and other system noise can affect the accuracy of the measurement values. Summary of the Invention

[0010] This utility model aims to provide a comb-shaped probe, and the technical problems to be solved include at least how to use a set of emitting light sources to automatically calibrate the measurement channels of multiple detectors in conjunction with gyroscopes, thereby increasing the measurement range and reducing operation time and difficulty; how to increase the ease of use while reducing the influence of hair on the detection results; and how to filter out the influence of noise generated by natural light and ambient light.

[0011] To achieve the above objectives, this utility model provides a comb-shaped probe, comprising a set of emitting light sources and a multi-channel detector. A gyroscope is provided on the top of the multi-channel detector, and the gyroscope is used to calibrate the measurement channel. A bandpass filter is provided at the probe at the bottom of the multi-channel detector.

[0012] Preferably, the emitting light source is positioned at the center of the comb-shaped probe, and the multi-channel detector surrounds the emitting light source.

[0013] Preferably, the multi-channel detectors are evenly distributed on a circle with the emission light source as the center and a radius of 3 cm.

[0014] Preferably, the multi-channel detector includes a first detector, a second detector, a third detector, and a fourth detector.

[0015] Preferably, the operating wavelength of the multi-channel detector is 750nm to 850nm.

[0016] Preferably, the light source is a laser.

[0017] Preferably, the center wavelength of the laser is 808 nm.

[0018] Preferably, the bandpass filter is an absorption-type neutral density filter.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The comb-shaped probe described in this invention uses a set of emitting light sources to calibrate the measurement channels with multiple detectors and gyroscopes, thereby increasing the measurement range and reducing operation time and difficulty. The comb-shaped probe design increases ease of use and reduces the influence of hair on the test results. It can also effectively filter out the influence of noise generated by natural light and ambient light. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the specific embodiments of this application to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0022] Figure 1 This is a schematic diagram of the comb-shaped probe described in this utility model.

[0023] Figure 2 This is a bottom view of the comb-shaped probe described in this utility model. Detailed Implementation

[0024] The present invention is described in more detail below to aid in understanding it.

[0025] like Figures 1 to 2 As shown, the comb-shaped probe of this invention uses a set of emitting light sources to form a multi-channel detector, thus constructing a comb-shaped probe structure. It is combined with an optical filtering component to reduce the influence of ambient light noise. A gyroscope calibration measurement channel is also provided on the probe.

[0026] Existing technologies generally employ a dual-probe design, where one light source emits laser light and another detector detects the light after it has been absorbed and refracted by the tissue. When the tissue distribution is uneven, the scalp curvature is too large, or the detection area is covered by a lot of hair, skull, or other objects that affect light transmission, it is easy to miss detections. Subsequent detections require constantly moving the detection position, which prolongs the measurement time.

[0027] The multi-probe design is as follows: the center of the probe is light source 1, and multiple detectors are distributed with a radius of 3cm. Figure 1 and Figure 2 This is an example with four detectors. To prevent detector saturation due to ambient light, an absorptive neutral density filter is added to the detector probe, with an operating wavelength of 750-850nm and a laser center wavelength of 808nm. The bandpass filter ensures the laser wavelength passes through smoothly while filtering out optical noise outside the operating wavelength, thus preventing detector saturation due to ambient light and improving the detection signal-to-noise ratio.

[0028] Multiple probes are combined to form a comb-shaped probe, which can simultaneously detect the emitted light intensity at multiple locations and in multiple directions. The design of the comb-shaped probe ensures that the probe can pass through the "hair barrier" and make better contact with the scalp.

[0029] The probe is equipped with a gyroscope. When measuring different brain regions, the probe's direction and angle are recorded, so that the positioning of each detector relative to the scalp is recorded. When measuring the contralateral brain region, the probe is calibrated according to the direction and angle of the previous measurement, so that the detector positions of each measurement pair correspond and ensure the symmetry of the measurement positions (each measurement requires two measurement positions, i.e., one measurement on the left side and one measurement on the right side. The measurement positions on the left and right sides are called a measurement pair, and the selection of measurement positions should follow medical standards).

[0030] Based on the above, this application provides a comb-shaped probe, which includes a set of emitting light sources 1 and a multi-channel detector. A gyroscope 2 is provided on the top of the multi-channel detector, and the gyroscope is used to calibrate the measurement channel. A bandpass filter is provided at the probe at the bottom of the multi-channel detector.

[0031] The bandpass filter is used to ensure that the laser wavelength passes through smoothly, while filtering out optical noise outside the working wavelength, avoiding ambient light from saturating the detector and improving the detection signal-to-noise ratio.

[0032] Preferably, the emitting light source 1 is positioned at the center of the comb-shaped probe, and the multi-channel detector surrounds the emitting light source 1.

[0033] Preferably, the multi-channel detectors are evenly distributed on a circle with the emitting light source 1 as the center and a radius of 3 cm.

[0034] Preferably, the multi-channel detector includes a first detector 3, a second detector 4, a third detector 5, and a fourth detector 6.

[0035] Preferably, the operating wavelength of the multi-channel detector is 750nm to 850nm, and the emitting light source 1 is a laser with a center wavelength of 808nm.

[0036] Preferably, the bandpass filter is an absorption-type neutral density filter.

[0037] Preferably, the comb-shaped probe can simultaneously detect the emitted light intensity at multiple locations and in multiple directions, and the comb-shaped probe can pass through the "hair barrier" and make effective contact with the scalp.

[0038] When using the comb-shaped probe described in this application to examine cerebral hemorrhage, the comb-shaped probe is fixed in the measurement position according to medical standards; when measuring different brain regions, the direction and angle of the probe are recorded so that the positioning of each probe relative to the scalp is recorded; when measuring the contralateral brain region, the probe is calibrated according to the direction and angle of the previous measurement so that the probe position of each measurement pair corresponds and the symmetry of the measurement position is guaranteed.

[0039] The preferred embodiments of this utility model have been described above, but they are not intended to limit the scope of this utility model. Those skilled in the art can make improvements and changes to the embodiments disclosed herein without departing from the scope and spirit of this utility model.

Claims

1. A comb-like probe, characterized in that, The comb-shaped probe comprises a set of emitting light sources and a multi-channel detector, the top of the multi-channel detector is provided with a gyroscope for calibrating the measuring channel, and the bottom of the multi-channel detector is provided with a band-pass filter at the probe.

2. The comb probe of claim 1, wherein, The emitting light sources are arranged at the center of the comb-shaped probe, and the multi-channel detector is arranged around the emitting light sources.

3. The comb probe of claim 1, wherein, The multi-channel detectors are uniformly distributed on a circumference with the emitting light sources as the center and 3 cm as the radius.

4. The comb probe of claim 1, wherein, The multi-channel detector comprises a first detector, a second detector, a third detector and a fourth detector.

5. The comb probe of claim 1, wherein, The working wavelength of the multi-channel detector is 750-850 nm.

6. The comb probe of claim 1, wherein, The emitting light source is a laser.

7. The comb probe of claim 6, wherein, The central wavelength of the laser is 808 nm.

8. The comb probe of claim 1, wherein, The band-pass filter is an absorption type neutral density filter.

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