Miniature ultrasonic radar distance measuring device for resectoscope

Abstract

The present application relates to a micro ultrasonic radar ranging device for an electric resectoscope, which has a probe rod body, the inside of the probe rod body is provided with a probe rod electrode, one end of the probe rod electrode remains inside the probe rod body, and the end of the probe rod electrode remaining inside is connected with a probe rod head, the probe rod head comprises a probe rod front fork and a probe head base, and a micro ultrasonic probe is arranged on the probe head base. The micro ultrasonic radar ranging device for the electric resectoscope is an ultrasonic ranging device that can be carried on the electric resectoscope, meets the clinical needs of an operator to directly observe the shape of a surgical area during transurethral resection, solves the inconvenient, non-intuitive and non-direct problems existing in transabdominal, perineal or rectal route ultrasonic measurement and ultrasonic cystoscope measurement, and enables a urologist to conveniently measure the intracavitary anatomical structure when performing intracavitary operation on the prostate urethra using the electric resectoscope, so that the urologist can timely understand the intracavitary structure changes of the surgical area after surgical intervention and better formulate a subsequent surgical plan.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of medical devices, and particularly relates to a micro ultrasonic radar ranging device for resectoscopes, and more particularly to a micro ultrasonic radar ranging device which can conveniently measure the anatomical structure in the cavity when a urologist uses a resectoscope to perform intracavitary operation on the prostatic urethra. BACKGROUND

[0002] In the existing transurethral resection of the prostate, the operator usually removes the hyperplasia of the prostate protruding into the urethra by means of a resectoscope to relieve the obstruction of the urethra and restore the unobstructed urination. In the past, due to insufficient attention to the shape of the prostatic urethra at the end of the operation, there is also a lack of corresponding measuring tools.

[0003] At present, the shape of the prostatic urethra at the end of the operation can be measured by means of bedside ultrasound, using the transabdominal, perineal or transrectal approach. Not only does it need a dedicated person and machine to wait at the bedside of the operating table, but also the transabdominal approach is inconvenient to observe due to the long distance, and the perineal or transrectal approach is easy to contaminate the operating table range. In addition, although there is an ultrasonic cystoscope that can be used to detect the urethra, it needs to remove the resectoscope and its outer sheath and replace the supporting display equipment, which not only objectively increases the damage to the urethra, but also causes inconvenience due to repeated replacement of instruments and prolongs the operation time.

[0004] In recent years, studies have found that the shape of the prostatic urethra at the end of the operation may have some correlation with the urination effect, so the demand for structure measurement and observation of the prostatic urethra at the end of the operation is increasing. Therefore, designing a micro ultrasonic radar ranging device that can be mounted on a resectoscope without affecting the direct observation of the resectoscope, and an intuitive and accurate intracavity measurement tool, will help the precise design and implementation of the operation. SUMMARY

[0005] In view of this, the purpose of the present application is to provide a micro ultrasonic radar ranging device for resectoscopes, which aims to solve the problem that the current structure measurement of the prostatic urethra at the end of the operation needs to use external equipment, which increases the damage to the urethra, causes inconvenience to observation, prolongs the operation time, and easily contaminates the operating table.

[0006] Therefore, the present application is designed as a micro ultrasonic radar ranging device that can be mounted on a resectoscope and can directly observe the surgical area, which meets the clinical needs of the operator to directly observe the shape of the surgical area during transurethral resection, so that the urologist can conveniently measure the anatomical structure in the cavity when using a resectoscope to perform intracavitary operation on the prostatic urethra, thereby timely understanding the changes in the intracavitary structure of the surgical area after surgical intervention and better formulating subsequent surgical plans.

[0007] In order to achieve the above-mentioned purpose of the application, the technical scheme adopted is as follows:

[0008] The micro ultrasonic radar ranging device for resectoscope is mounted in the resectoscope for transurethral resection of prostate, and has a hollow and insulated probe rod body. An inner portion of the probe rod body is provided with a probe rod electrode. One end of the probe rod electrode is left in the inner portion of the probe rod body, and the other end extends out of the probe rod body. The one end of the probe rod electrode extending out of the probe rod body is provided with a probe rod clamp connected with a ranging system. The one end of the probe rod electrode left in the inner portion of the probe rod body is connected with a probe rod head through a wire. The probe rod head includes a hollow probe rod front fork and a probe head base. The probe head base is provided with micro ultrasonic probes in a "pin" shape. The wire is connected with the micro ultrasonic probes through the hollow probe rod front fork and the probe head base.

[0009] Further, the probe rod body is provided with a scale.

[0010] Further, the probe head base has a U-shaped structure, and a head end of the probe head base is level with a head end of a lens of the resectoscope. Here, the head end of the probe head base refers to a most front end of the probe head base.

[0011] Preferably, the micro ultrasonic probes in the "pin" shape are arranged in a structure that one micro ultrasonic probe is arranged on each of two vertical portions of the U-shaped probe head base, and another micro ultrasonic probe is arranged on a circular arc portion of the U-shaped probe head base, so as to form the "pin" shape.

[0012] Preferably, the probe rod front fork includes a bifurcated portion and a connecting portion. The bifurcated portion is connected with the probe rod body, and the connecting portion is connected with the vertical portions of the U-shaped probe head base.

[0013] Further, the probe rod clamp includes a plurality of clamping rod units hingedly connected with each other. After two clamping rod units are hingedly connected, a scissors shape is formed. Each clamping rod unit is provided with an arc-shaped electrode plate at a portion in contact with the probe rod electrode.

[0014] Preferably, a spring is arranged between the two hingedly connected clamping rod units.

[0015] Further, the probe rod body is further provided with a probe rod support fixed with a middle portion of the lens of the resectoscope. The one end of the probe rod electrode extending out of the probe rod body is further provided with a probe rod clamp head connected with a tail portion of the resectoscope.

[0016] Further, the ranging system includes:

[0017] a host computer, which controls the micro ultrasonic probes to emit ultrasonic waves, records a starting time of emission and a receiving rebound time of the ultrasonic waves, and acquires data of left-right, up-down or front-back diameters of a cavity to be measured of a prostate urethra;

[0018] a display screen, which displays the measurement data acquired by the host computer in real time.

[0019] The communication module transmits the measurement data acquired by the host to the display screen.

[0020] Preferably, the ranging system further includes a power supply.

[0021] The beneficial effects of this invention are:

[0022] The miniature ultrasonic radar ranging device for transurethral resection of the prostate (TURP) of this invention enables the measurement of endoscopic lumbar structures during transurethral surgery, facilitating intraoperative planning and immediate postoperative evaluation. It can be mounted on a TURP endoscope for direct ultrasound ranging of the surgical area, meeting the clinical need for surgeons to directly observe the shape of the surgical area during TURP. This is more intuitive and accurate than bedside ultrasound examination via the perineum or rectum. Furthermore, even when mounted on the ventral side of the TURP endoscope and inserted into its sheath, it retains a return fluid space, ensuring unimpeded irrigation fluid return. Additionally, since the measurement is performed by the surgeon from the perspective of using the TURP endoscope, the operating technique aligns with the surgeon's usage habits, making the ranging results easier for the surgeon to understand and formulate the next surgical plan. Finally, its design, which allows direct mounting of the TURP endoscope, eliminates the need for a bedside ultrasound waiting area in the operating room, saving medical resources in terms of manpower and materials, avoiding waiting time, and reducing surgical risks. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the miniature ultrasonic radar ranging device for electrosurgical resection of the present invention, mounted on the electrosurgical resection mirror.

[0025] Figure 2 This is a schematic diagram of the overall structure of the miniature ultrasonic radar ranging device for electrosurgical resection mirror of the present invention;

[0026] Figure 3 This is a schematic diagram of the ultrasonic ranging of the miniature ultrasonic radar ranging device for the electrosurgical resection mirror of the present invention;

[0027] Figure 4 This is a detailed structural diagram illustrating the miniature ultrasonic radar ranging device for the electrosurgical resection mirror of the present invention.

[0028] Figure 5 for Figure 4 The diagram shows the structure of the probe clamp. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In recent years, there has been an increasing demand for measuring and observing the structure of the prostatic urethra at the end of the operation, but at present, there are problems such as inconvenience, non-intuitiveness and non-directness when measuring the prostatic urethra by external equipment through the abdominal, perineal or rectal route ultrasound and ultrasonic cystoscope, therefore, the inventors of the present application designed a miniature ultrasonic radar ranging device which can be carried on the resectoscope and does not affect the direct observation under the direct vision of the resectoscope, and can directly and accurately measure the lumen. In this way, the urologist can conveniently measure the anatomical structure in the lumen when using the resectoscope to perform intracavitary operation on the prostatic urethra, so as to timely understand the changes of the intracavitary structure in the operation area after the surgical intervention, and better formulate the subsequent surgical plan.

[0032] The principle of the present application is to place the resectoscope carrying the miniature ultrasonic radar ranging device into the operation area, and use the ultrasonic radar ranging principle to place the miniature ultrasonic probe at the starting part of the cavity to be measured, and slowly send it into the cavity to be measured to measure the anteroposterior diameter or the left-right diameter or the superior-inferior diameter.

[0033] In order to realize the above principle, as shown in Figures 1-5As shown in the figure, the hardware structure design of the miniature ultrasonic radar ranging device for the resectoscope of the present application is as follows: the ranging device has a hollow and insulated probe rod body 4, the inside of the probe rod body 4 is provided with a probe rod electrode 5, one end of the probe rod electrode 5 stays inside the probe rod body 4 and the other end extends to the outside of the probe rod body 4, one end of the probe rod electrode 5 extending to the outside of the probe rod body 4 is provided with a probe rod clamp 7 connected with the ranging system, one end of the probe rod electrode 5 staying inside the probe rod body 4 is connected with a probe rod head 1 through a wire 13, the probe rod head 1 includes a hollow probe rod front fork 2 and a probe base 12, the probe base 12 is provided with miniature ultrasonic probes 11 in a "pin" shape, the wire 13 is connected with the miniature ultrasonic probes 11 through the hollow probe rod front fork 2 and the probe base 12.

[0034] As shown in the figure, Figures 3-4 As a further improvement of the present embodiment, the structure of the probe base 12 in the present example is U-shaped, and the head end of the probe base 12 is kept level with the head end of the resectoscope lens, the purpose of this design is to realize observation under direct vision and measurement by the miniature ultrasonic probes at the same time without interference.

[0035] Meanwhile, in the present example, the miniature ultrasonic probes 11 in a "pin" shape are arranged in a "pin" shape on the basis of the structure that one miniature ultrasonic probe is installed on each of the two vertical parts of the U-shaped probe base 12, and one miniature ultrasonic probe is installed on the circular arc part, which constitutes the "pin" shape. This structure arrangement can facilitate the measurement of the left-right diameter, the front-rear diameter and the up-down diameter in the cavity.

[0036] As shown in the figure, Figure 4 As a further improvement of the present embodiment, the probe rod front fork 2 in the present example includes a bifurcated part 21 and a connecting part 22, the bifurcated part 21 is connected with the probe rod body 4, and the connecting part 22 is connected with the vertical part of the U-shaped probe base 12. The design of the probe rod front fork is mainly to match the structure of the U-shaped probe base.

[0037] As shown in the figure, Figure 5 As a further improvement of the present embodiment, the probe rod clamp 7 in the present example includes a set of clamping rod units 71 hinged with each other, the two clamping rod units 71 form a scissors shape after being hinged, each clamping rod unit 71 is provided with an arc-shaped electrode plate 72 at the part in contact with the probe rod electrode 5, and a spring 73 is arranged between the two hinged clamping rod units 71.

[0038] As shown in the figure, Figure 2As shown, in order to facilitate the easy mounting of the ranging device on the resectoscope, a probe rod holder 3 is arranged on the probe rod body 4 and fixed to the middle part of the resectoscope, and a probe rod clamp head 6 is arranged at one end of the probe rod electrode 5 extending outside the probe rod body 4 and connected to the tail part of the resectoscope.

[0039] The ranging device of the present application finally realizes the acquisition and display of measurement data through its matched ranging system, therefore, the ranging system in the present example comprises: a power supply and a host, which controls the mini ultrasonic probe to emit ultrasonic waves and records the emission start time and the reception bounce time of the ultrasonic waves, so as to acquire the data of the left-right diameter or the up-down diameter or the front-back diameter of the prostatic urethra cavity to be measured; a display screen, which displays the measurement data acquired by the host in real time; and a communication module, which transmits the measurement data acquired by the host to the display screen.

[0040] In the transurethral resection of the prostate, if the operator needs to implement the measurement under the direct vision of the cavity, the resectoscope can be withdrawn, the inner and outer sheaths are retained in the urethra, and then the resecting knife on the resectoscope is removed, the ranging device in the present example is mounted on the resectoscope according to the use mode of the resecting knife, the probe rod clamp head is fixed into the handle sliding block of the resectoscope, at this time the probe rod head is level with the head end of the lens of the resectoscope, the probe rod clamp is clamped to the probe rod electrode, and the host is started.

[0041] After the resectoscope with the ranging device is placed in the operation area, the head end of the lens is at the starting part (such as the location of the corona glandis) of the cavity to be measured (such as the prostatic urethra), the left-right level is adjusted and maintained, at this time the front-back diameter can be measured; then the thumb is buckled into the handle of the resectoscope and pushed forward, the probe rod head is slowly sent into the cavity to be measured (such as the prostatic urethra), the ranging process is implemented, the probe rod head can also be sent into the position to be measured by the way of inserting the lens or inserting the lens while pushing, so as to obtain the left-right diameter or the up-down diameter or the inclined diameter at an arbitrary angle of the current position.

[0042] The specific operation method is as follows:

[0043] Firstly, for the measurement of the left-right diameter, after the instrument position is ready and the ranging mode is started, the left mini ultrasonic probe (containing a transmitter / receiver) emits ultrasonic waves to the left side, and starts timing at the same time; the ultrasonic waves travel in the liquid (usually 5% mannitol or 0.9% sodium chloride solution), bounce back after encountering the left side wall of the cavity to be measured, and the ultrasonic wave receiver stops timing when the reflected wave is received, thus, according to the emission start time to reception bounce time captured by the timer, the time difference Δt L can be obtained; combined with the propagation speed V of the ultrasonic waves in the liquid, the distance D L from the left mini ultrasonic probe to the left side wall can be calculated.

[0044] D L = V·△t L / 2

[0045] Similarly, the right micro-ultrasound probe also performs the above process to obtain D R .

[0046] D R = V ·△t R / 2

[0047] Thus, combined with the distance (m) between the left and right micro-ultrasound probes, the horizontal distance from the left wall to the right wall of the plane where the probes are located, i.e., the left-right diameter (L 左右 .

[0048] L 左右 = D L + D R + m.

[0049] The above process is repeated to obtain continuous left-right diameter values during the thumb pushing process.

[0050] In addition, for the measurement of the up-down diameter, the rotation function of the resectoscope lens can be relied on. The lens can be rotated 90° clockwise or counterclockwise, so that the probe rod body mounted thereon is also rotated 90° correspondingly, thereby realizing the measurement of the up-down diameter at this position to obtain L 上下 . Correspondingly, the calculation formula is:

[0051] L 上下 = D 上 + D 下 + m.

[0052] Furthermore, for the measurement of the front-back diameter, when the lens head is located at the distal end of the cavity to be measured (e.g., the urethral meatus), and the field of view is aligned with the proximal end of the cavity to be measured (e.g., the bladder neck mucosa), the micro-ultrasound probe (transmitter / receiver) at the front end emits ultrasonic waves forward along the direction of the resectoscope lens, and the reflected waves are captured by the front-end ultrasonic probe receiver after encountering the wall. The timing and calculation process related to distance measurement as described above is performed, and according to the time captured by the timer from the start of transmission to the reception of the reflected waves, the time difference△t 前 can be obtained; combined with the propagation speed V of ultrasonic waves in liquid, the distance D 前 from the front-end probe to the front wall can be calculated.

[0053] D 前 = V ·△t 前 / 2

[0054] At this time, the distance is the front and back diameter of the cavity to be measured. If the thumb pushes the handle of the resectoscope during the detection, the distance s (read from the scale of the probe body 4, the minimum scale is millimeter) of the forward sliding of the probe body is added to the projection distance n between the front end of the ultrasonic probe and the lens in the direction of the lens body, so that the front and back diameter L of the cavity to be measured in the horizontal plane is obtained 前后 .

[0055] L 前后 =D 前 +s+n

[0056] The following points are worth mentioning:

[0057] 1) If the lens head is located at the starting part of the cavity to be measured, and the thumb has not yet pushed the resectoscope operating rod, at this time s is 0.

[0058] 2) Since the front end of the ultrasonic probe detects forward along the direction of the lens body, n is the projection distance in the direction of the lens body, therefore, the calculation of L 前后 has excluded the influence of the slight inclination of the U-shaped probe base 12 downward (the ventral side of the lens body).

[0059] Finally, the miniature ultrasonic radar ranging device for resectoscope realizes the measurement of the internal cavity anatomical structure in transurethral surgery, helps the realization of intraoperative planning and postoperative evaluation. It can be carried on the resectoscope, and the ultrasonic ranging of the operation area is performed under direct vision, which meets the clinical needs of the operator to directly observe the shape of the operation area in transurethral resection of the prostate. It is more intuitive and more accurate than the ultrasonic detection through the perineum or transrectal ultrasonic detection on the operation bed; moreover, it is carried on the ventral side of the resectoscope lens body and placed into the resectoscope sheath together, and still retains the backwater space, which does not affect the reflux of the irrigation fluid; in addition, since the measurement is implemented by the operator himself from the perspective of using the resectoscope, the operation method is consistent with the use habit of the resectoscope, and the obtained ranging result is easier for the operator to understand and develop the next surgical plan; finally, it can be directly carried on the resectoscope (endoscope), without the need for a bedside ultrasound waiting area, which saves medical resources to a certain extent, avoids waiting time, and reduces surgical risk.

[0060] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A miniature ultrasonic radar distance measuring device for resectoscope, which is mounted in a resectoscope for transurethral resection of the prostate, characterized in that, The ranging device has a hollow and insulated probe rod body, which is provided with a scale; the inside of the probe rod body is provided with a probe rod electrode, one end of which stays inside the probe rod body and the other end of which extends outside the probe rod body, one end of the probe rod electrode extending outside the probe rod body is provided with a probe rod clamp connected with a ranging system, one end of the probe rod electrode staying inside the probe rod body is connected with a probe rod head through a wire, the probe rod head includes a hollow probe rod front fork and a probe head base, the probe head base is provided with micro ultrasonic probes in a "pin" shape, the micro ultrasonic probes in a "pin" shape are based on the structure that one micro ultrasonic probe is installed on each vertical part of the U-shaped probe head base, and one micro ultrasonic probe is installed on the circular arc part, forming a "pin" shape; the wire is connected with the micro ultrasonic probes through the hollow probe rod front fork and the probe head base; The structure of the probe head base is U-shaped, and the head end of the probe head base is flush with the head end of the resectoscope lens; The probe rod front fork includes a bifurcated part and a connecting part, the bifurcated part is connected with the probe rod body, and the connecting part is connected with the vertical part of the U-shaped probe head base; The probe rod clamp includes a group of hingedly connected clamp rod units, the two clamp rod units form a scissors shape after being hingedly connected, and each clamp rod unit is provided with an arc-shaped electrode plate at the part in contact with the probe rod electrode; a spring is further arranged between the two hingedly connected clamp rod units; The probe rod body is further provided with a probe rod support fixed with the middle part of the resectoscope lens, and one end of the probe rod electrode extending outside the probe rod body is further provided with a probe rod clamp head connected with the tail part of the resectoscope; The ranging system includes a power supply, a host, a display screen and a communication module; the host controls the micro ultrasonic probes to emit ultrasonic waves, records the emission start time and the reception bounce time of the ultrasonic waves, and obtains the data of the left-right diameter, the up-down diameter or the front-back diameter of the prostate urethral cavity to be measured; the display screen displays the measurement data obtained by the host in real time; the communication module transmits the measurement data obtained by the host to the display screen; For the measurement of left-right diameter, after the instrument position is ready and the distance measurement mode is turned on, the left micro ultrasonic probe emits ultrasonic waves to the left, and starts timing at the same time of emission; the ultrasonic waves travel in the liquid and bounce back after encountering the left wall of the cavity to be measured; the ultrasonic wave receiver stops timing when the reflected waves are received; according to the time difference Δt captured by the timer from the start of emission to the reception of the bounce-back, the distance D from the left micro ultrasonic probe to the left wall can be calculated L ; in combination with the propagation speed V of ultrasonic waves in the liquid, the distance D from the left micro ultrasonic probe to the left wall is calculated L ; D L = V·△t L / 2 Similarly, the right side micro-ultrasound probe is simultaneously processed as above, and D R ; D R = V·△t R / 2; Thus, in combination with the interval m between the left and right micro-ultrasound probes, the horizontal distance from the left side wall to the right side wall of the plane where the probes are located, i.e. the left-right diameter L of the plane, is obtained 左右 ; L 左右 = D L + D R + m; The above process is repeated, and continuous left-right diameter change values are obtained during the thumb advancing process; In addition, for the measurement of the vertical diameter, the rotation function of the resectoscope body is relied on to achieve the measurement. The body is rotated 90° clockwise or counterclockwise, so that the probe rod body carried thereon is also rotated 90° correspondingly, so that the measurement of the vertical diameter is achieved at this position, and L is obtained. 上下 The calculation formula is: L 上下 = D 上 + D 下 + m; Furthermore, for the measurement of the front-to-back diameter, when the head end of the lens is located at the distal end of the cavity to be measured, and the field of view is aligned with the proximal end of the cavity to be measured, the front-end micro-ultrasound probe emits ultrasound waves forward along the direction of the resectoscope lens body, and the reflected waves are captured by the front-end ultrasound probe receiver after encountering the wall. The distance-related timing and calculation process is performed as described above. According to the time difference Δt captured by the timer from the start of emission to the reception of the reflected waves, the time difference Δt can be obtained 前 ; combined with the propagation speed V of the ultrasound waves in the liquid, the distance D from the front-end probe to the front wall is calculated 前 ; D 前 = V·△t 前 / 2 ; At this time, the distance is the front-to-back diameter of the cavity to be measured. When the action of pushing the handle of the resectoscope with the thumb is added during the detection, the sliding distance s of the probe body forward, the sliding distance s is read from the scale of the probe body, and the projection distance n of the front end of the ultrasonic probe in the direction of the resectoscope lens from the lens is added to obtain the front-to-back diameter L of the cavity to be measured in the horizontal plane 前后 ; L 前后 = D 前 + s + n.

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