JP3523753B2 - Ultrasonic diagnostic device in body cavity - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-body-cavity ultrasonic diagnostic apparatus that inserts an insertion portion into a body cavity, emits ultrasonic waves to a part to be examined, and performs ultrasonic scanning. About. 2. Description of the Related Art An in-body-cavity ultrasonic diagnostic apparatus for performing a mechanical scan generally has an ultrasonic probe, and the ultrasonic probe is housed in a housing which is a distal end protecting member. The housing is filled with an ultrasonic transmission medium for transmitting ultrasonic waves. If air bubbles are present in the ultrasonic transmission medium, the ultrasonic waves are attenuated and cannot be transmitted well, and the obtained ultrasonic image deteriorates. As one example of removing such bubbles, see Japanese Patent Application Laid-Open
There is a method proposed in 8-165833. This constitutes a fluid filling chamber of an ultrasonic wave propagation device capable of maintaining a low pressure head and adjusting an effective volume in order to prevent bubbles from forming in the chamber. If it is not desirable to directly adjust the volume of the fluid filling chamber, an additional fluid reservoir is connected to the fluid filling chamber to adjust the effective volume and pressure of the additional fluid reservoir. [0004] However, when the conventional method is applied to the housing of an ultrasonic diagnostic apparatus in a body cavity, there are cases where too much pressure is applied inside the housing. If too much pressure is applied to the inside of the housing, the pressure of the ultrasonic transmission medium may exceed the mounting strength of the housing, and the housing may fall out of the insertion portion. Also, the housing may be ruptured. [0005] The present invention is proposed to solve the above-mentioned problem, and removes air bubbles by applying a pressure to the ultrasonic transmission medium in the housing so as not to damage the housing, thereby performing proper ultrasonic scanning. It is an object of the present invention to provide an ultrasonic diagnostic apparatus in a body cavity that can be used. SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and is directed to an ultrasonic wave which is rotatable at the distal end of an insertion portion with respect to an insertion direction axis and performs a mechanical scan. A probe and a tip protection member for hermetically protecting the periphery of the ultrasonic probe are provided, and the tip protection member is filled with an ultrasonic transmission medium, and the supply of the ultrasonic transmission medium to the apparatus hand side is performed. A supply port communicating with a passage, and a control mechanism for opening and closing the ultrasonic transmission medium when supplying the ultrasonic transmission medium at a position corresponding to the supply port. An ultrasonic diagnostic apparatus in a body cavity, wherein an internal pressure adjusting means for adjusting a transmission medium pressure is provided. [0007] With the above configuration, the generated bubbles are removed while filling the ultrasonic transmission medium in the distal end protection member. At this time, when the pressure of the ultrasonic transmission medium becomes equal to or higher than a predetermined value, the internal pressure is adjusted. [0008] Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view of the in-body-cavity ultrasonic diagnostic apparatus according to the first embodiment. The insertion portion 1 to be inserted into a body cavity has a distal end portion 2, a bending portion 3, and a flexible portion 4. An ultrasonic probe 5 is provided in the distal end portion 2 of the insertion section 1, and a housing (tip protective member) 6 is provided so as to cover the ultrasonic probe 5. An endoscope operation section 7 is provided at the rear end (hand side) of the insertion section 1. The endoscope operation section 7 is provided with a bending operation knob 8 for performing a bending operation on the bending section 3, an air supply / water supply / suction button 9, and the like, and a universal cord 10 is connected thereto. At the end of the universal cord 10, a connector 11 connected to a light source device (not shown) is provided. On the hand side of the endoscope operating section 7, a sub-operating section 12 for driving and operating the ultrasonic probe 5 is provided. An ultrasonic code 13 is connected to the sub-operation unit 12, and a connector 14 connected to an ultrasonic observation device (not shown) is provided at an end of the ultrasonic code 13. An eyepiece 15 is provided on the near side of the sub operation unit 12. Then, the insertion portion 1 is inserted into the body cavity, and illumination light from a light source device (not shown) connected to the connector 11 is irradiated on the observation site via a light guide (not shown) inserted into the insertion portion 1. I do. The observation image of the observation site is transmitted to the eyepiece unit 15 by an image guide (not shown) inserted into the insertion unit 1. Thus, the endoscope operation unit 7 and the sub operation unit 12 can be operated while observing the observation site. The sub-operation section 12 is provided with a switch 16 for controlling an ultrasonic function. By operating an ultrasonic observation device (not shown) in advance, a function of freezing the ultrasonic image, a function of releasing the frozen ultrasonic image, and a function of recording the ultrasonic image as a moving image The operating function to be performed can be selected. FIG. 2 is a cross-sectional view for explaining the structure of the distal end portion 2 in detail. As shown in the figure, inside the distal end portion 2, an ultrasonic probe 5 is housed in a housing 6, and an ultrasonic transmission medium 17 such as liquid paraffin, sodium carboxymethylcellulose aqueous solution, and sucrose solution is filled. I have. The ultrasonic probe 5 is fixed to a probe holder 18, and is kept airtight by a sealing member 19 attached to the outer periphery of the probe holder 18 so that the ultrasonic transmission medium 17 does not leak out of the housing 6. As described above, a seal member 20 is also provided at a place where the housing 6 and the distal end portion 2 are fixed in order to maintain airtightness. Further, a seal member 23 is provided between a bearing retainer 22 that fixes a bearing 21 that rotatably supports the probe holder 18 and an inner wall of the distal end portion 2. On the other hand, the tip of the housing 6 is sealed by screwing a lid 25 provided with a seal member 24. Thus, the sealing members 24, 19, 2
By means of 0 and 23, the inside of the housing 6 is completely sealed. In addition, as a material of these seal members, when the above-mentioned aqueous solution of sodium carboxymethylcellulose is used as an ultrasonic transmission medium, silicon rubber is used. As described above, the probe holder 18
The probe holder 18 is held with respect to the distal end portion 2 by two bearings 21.
6, it is connected to a flexible shaft 27 that passes through the inside of the insertion section 1. This flexible shaft 2
Numeral 7 passes through a guide tube 28 provided in the curved portion 3 and the flexible portion 4, and is connected to a later-described drive unit in the sub-operation unit 12. In addition, the guide tube 28
Using low friction and low wear materials such as urethane and Teflon,
A metal band 28a is wound around the outside of the guide tube 28. Also, inside the guide tube 28,
Castor oil 29 is filled as lubricating oil. The bearing retainer 22 is fixed to the tip 2 with a set screw 30. An opening 31 is formed in the bearing retainer 22 so as to open from the housing 6 toward the user, and an ultrasonic transmission medium supply conduit 32 communicates with the opening 31. The ultrasonic transmission medium supply pipe 32 is guided to the endoscope operation section 7 and the sub operation section 12 through the curved section 3 and the flexible section 4 via the pipe 33. FIG. 3 is a detailed view of the configuration of the endoscope operation unit 7 and the sub operation unit 12. The flexible shaft 27 that has passed through the insertion portion 1 as shown in FIG.
And the drive unit 3 in the sub-operation unit 12 via a joint 35 and a joint flexible shaft 36.
7 is connected. The pipe 33 is connected to a leak port (internal pressure adjusting means) 38 provided in the operation section 7, and is further provided with a pressure port (control mechanism) provided in the sub-operation section 12 via a pipe 39. 40. FIG. 4 is a detailed view of the structure of the pressurizing port 40. As shown in the drawing, the pressure port 47 is fixed with a set screw 41 so as to sandwich the housing of the sub-operation unit 12. Further, a seal member 42 is provided between the pressurizing port 40 and the housing of the sub-operation unit 12 to keep the sub-operation unit 12 watertight. Further, a valve 43 disposed inside the pressurizing port 40 is urged upward in the figure via a spring 44. A packing 46 is provided between the pressure base 47 of the pressure port 40 and the valve 43, and the pressure base 4 is provided.
The space between the valve 7 and the valve 43 is kept watertight. The pressure base 47 is integrally formed so as to protrude outside the sub-operation portion 12 and has an opening 4.
The end of 7a has a luer lock shape. The inside of the opening 47a has a taper defined by JIS T3101 and is slightly narrowed toward the inside.
Then, by inserting the syringe 47b into the opening 47a, the valve 43 is pushed down, and the syringe 47b is pushed downward.
b and the duct 39 are connected to each other. FIG. 5 is a detailed view showing the configuration of the leak port 38. As shown in FIG. As shown in the figure, the leak port 38 is fixed so that the housing of the endoscope operation section 7 is sandwiched by a set screw 48. Then, a seal member 49 is inserted between the leak port 38 and the endoscope operation section 7 to keep the endoscope operation section 7 watertight. A valve 50 is provided inside the leak port 38 and urged downward in the figure by a spring 51 to seal the leak hole 52 in a watertight manner. Note that the valve 50 is formed of silicon rubber, neoprene rubber, or the like. The spring 51 is connected to the housing 6.
When the ultrasonic transmission medium 17 (FIG. 2) in FIG. 1 (FIG. 1) is pressurized, the housing 6 contracts with a force smaller than the pressure at which the housing 6 falls off. The leak cap 53 is screwed into the leak port 38 in a water-tight manner so as to protrude outside the endoscope operating section 7.
Can be connected. The operation of the first embodiment configured as described above will be described. By the driving force of the driving unit 37, the joint flexible shaft 36, the joint 35,
When the flexible shaft 27 rotates, the ultrasonic probe 5 provided at the tip also rotates within the housing 6 (FIGS. 3 and 2). Then, the ultrasonic probe 5 transmits and receives an ultrasonic beam while rotating. Then, the ultrasonic probe 5 passes through the ultrasonic transmission medium 17 and the housing 6 and performs a mechanical scan. In this way, when the reflected beam from the subject is received, it is converted into an electric signal, and after signal processing by an observation device (not shown), an ultrasonic image is obtained. Incidentally, in order to obtain a good ultrasonic image, it is necessary for the ultrasonic beam to pass through the ultrasonic transmission medium 17 well. Therefore, if air bubbles are generated when the ultrasonic transmission medium 17 is emphasized in the housing 6, transmission and reception of the ultrasonic beam are hindered, and a good ultrasonic image cannot be obtained. Therefore, the ultrasonic transmission medium 17 is injected from the pressurizing port 40 through the ultrasonic transmission medium supply pipe 32 and the pipes 33 and 39 using the syringe 47b (FIG. 4), and the ultrasonic wave having bubbles is generated. Pressure is applied to the transmission medium 17. When the syringe 47b is attached to the pressure base 47, a connection with a luer-locked syringe is ensured. That is, the syringe 47b is attached to the pressure base 47, and the valve 43, which has kept the pipe line 39 watertight from the outside, is pushed down by the tip end 47c of the syringe 47b so that the inside of the syringe 47b communicates with the pipe line 39. (FIG. 4). Then, the ultrasonic transmission medium 17 is injected from the pressure port 40 as described above. In this case, since the inside of the housing 6 is completely sealed by the sealing member, the inside of the housing 6 is pressurized, and the bubbles in the housing 6 are reduced. At this time, if the inside of the housing 6 is excessively pressurized, the pressure of the ultrasonic transmission medium 17 becomes larger than the urging force of the spring 51 in the leak port 38. Accordingly, the spring 51 contracts and the valve 50 does not block the leak hole 52, so that the ultrasonic transmission medium 17 is discharged from the leak base 53 to the outside through the leak hole 52. Therefore,
The housing 6 does not fall off. When the ultrasonic transmission medium 17 is released to the outside, in order to prevent the ultrasonic transmission medium 17 from scattering in an unintended direction, a tube 54 is attached to the leak base 53, and the ultrasonic transmission medium 17 can be discharged in a predetermined direction ( (Fig. 5). Since the first embodiment is constructed as described above, the ultrasonic transmission medium supply pipe 32, the pipes 33, 3
9 to supply the ultrasonic transmission medium 17 through the housing 6.
When the inside is pressurized to reduce bubbles, even if the inside of the housing 6 is excessively pressurized, the ultrasonic transmission medium 17 can be released from the leak base 53 to the outside, so that a situation in which the housing 6 falls off is prevented. can do. FIG. 6 shows a second embodiment of the present invention. Parts corresponding to the first embodiment are denoted by the same reference numerals (the same applies to the following embodiments).
As shown, a cap 55 is provided on the housing 6 and is fixed by being urged by a spring 56. Further, the cap 55 seals the housing 6 in a watertight manner via a seal member 57. The spring 56 has a stopper 5 having one end attached to the cap 55.
8, the other end is fixed to the inner wall of the housing 6 so as not to come off. The spring 56 is configured such that when the ultrasonic transmission medium 17 in the housing 6 is pressurized, the spring 56 contracts with a force smaller than the pressure at which the housing 6 falls off. Further, the ultrasonic transmission medium supply pipe 32 passes through the curved portion 3 via the pipe 33 and directly communicates with the pressurizing port 40 and the pressurizing cap 47 described in the first embodiment. Other configurations are the same as in the first embodiment. Next, the operation of the second embodiment will be described. Through the ultrasonic transmission medium supply pipe 32 and the pipe 33, the ultrasonic transmission medium 1 is injected from the pressurizing port 40 using a syringe.
However, when bubbles are generated in the ultrasonic transmission medium 17 in the housing 6, the transmission and reception of the ultrasonic beam are hindered, and a satisfactory ultrasonic image cannot be obtained. As described in the embodiment. Therefore, similarly to the first embodiment, an ultrasonic transmission medium is injected using a syringe. Then, since the inside of the housing 6 is completely sealed by the seal member, the inside of the housing 6 is pressurized by the injection of the ultrasonic transmission medium 17, and the generated bubbles in the housing 6 are reduced. At this time, if the inside of the housing 6 is excessively pressurized, the pressure of the ultrasonic transmission medium 21 becomes larger than the urging force of the spring 56 of the cap 55. Then, the spring 56 contracts, and the cap 55 does not seal the housing 6 in a watertight manner.
5. It is discharged outside through the vicinity of the seal member 57. The operation based on the other configuration is the same as in the first embodiment. Since the second embodiment is configured as described above, the ultrasonic transmission medium 17 is supplied from the ultrasonic transmission medium supply pipes 32 and 33 to pressurize the inside of the housing 6 to generate air bubbles. To reduce the size of the housing 6
Even if the inside is excessively pressurized, the ultrasonic transmission medium 17 is discharged to the outside from the vicinity of the cap 55 and the seal member 57, so that the housing 6 does not fall off. In addition, since the ultrasonic transmission medium 17 is emitted from the front end of the housing 6, the air bubbles are collected upward by performing the operation with the housing 6 and the cap 55 facing upward when removing the air bubbles, so that the cap 55 blocks the air. When the state is released, it becomes easier for air bubbles to escape. FIG. 7 shows a third embodiment.
It is sectional drawing of the adapter arrange | positioned instead of the leak port 38 in 1st Embodiment. The adapter body 59 has JI
The syringe taper 60 and the luer lock 61 defined in ST3101 are integrally formed. A valve 62, a spring 63, and a leak hole 64 are provided inside the adapter body 59, similarly to the mechanism shown in FIG. 5 according to the first embodiment. Further, the spring 63 is set to have such an amount that when the ultrasonic transmission medium in the housing is pressurized, the spring 63 contracts with a force smaller than the pressure at which the housing falls off. The leak cap 65 is connected to the adapter body 5.
9 is screwed into the adapter body 59 in a water-tight manner so as to protrude outside.
Can be connected. The other configuration is almost the same as that of the first embodiment, except that the mechanism shown in FIG. 5 in the first embodiment is not provided, and the pipe line 33 is directly connected to the pressure port 40 and the pressure base 47 (FIG. ). Next, the operation of the third embodiment will be described. As described above, when air bubbles are generated in the ultrasonic transmission medium in the housing, transmission and reception of the ultrasonic beam are hindered, and a good ultrasonic image cannot be obtained. Therefore, the ultrasonic transmission medium is injected using a syringe from the pressurizing port through the ultrasonic transmission medium supply pipe and the pipe via the adapter body 59. Then, similarly to the first embodiment,
Bubbles in the housing are reduced. In this case, when the inside of the housing is excessively pressurized, the pressure of the ultrasonic transmission medium becomes larger than the urging force of the spring 63. In this case, since the spring 63 contracts and the valve 62 does not block the leak hole 64, the leak hole 6
The ultrasonic transmission medium is discharged to the outside from the leak base 65 through the 4 and the housing does not fall off. When the ultrasonic transmission medium is released to the outside, a tube 6 is attached to the leak base 65 to prevent the ultrasonic transmission medium from scattering in an unintended direction.
6 can be attached. Thus, the ultrasonic transmission medium can be easily discharged in the intended direction. Since the third embodiment is configured as described above, the same effects as those of the first embodiment can be obtained. In addition, since a leak port is not required in the endoscope operation section, the first embodiment is not required. The weight of the endoscope operation unit is reduced as compared with the embodiment, and workability can be improved. FIG. 8 shows a fourth embodiment and is a sectional view of an ultrasonic diagnostic apparatus. This embodiment is an ultrasonic diagnostic apparatus for ultrasonic diagnosis and treatment. The ultrasonic probe used in this device is of a type that moves back and forth, and cools the vibrator of the ultrasonic probe so as to perform effective treatment. In FIG.
The ultrasonic vibrator 67 is moved back and forth by a driving unit 69 via a hard or soft driving force transmitting shaft 68. The cover 78 covering the ultrasonic transducer 67 and the driving force transmission shaft 68 is filled with an ultrasonic transmission medium 70 also serving as a cooling medium. A check valve 71,
A check valve 72 is provided, and each check valve 71, 72 is connected to a pipe. That is, the check valve 71
Is connected to an ultrasonic transmission medium injection pipe 73, and further guided to an ultrasonic transmission medium injection tank 74. Further, an ultrasonic transmission medium discharge pipe 75 communicates with the check valve 72, and is further led to an ultrasonic transmission medium discharge tank 76. A seal member 77 is mounted on the outer periphery of the drive shaft 68 to prevent the ultrasonic transmission medium 70 from leaking to the drive section 69 side. Next, the operation of the fourth embodiment will be described. The ultrasonic vibrator 67 moves back and forth or rotates by the operation of the drive unit 69, and ultrasonic observation and treatment are performed. At this time, the volume of the ultrasonic transmission medium 70 in the cover 78 changes as the driving shaft 68 moves back and forth. That is, as the ultrasonic transducer 67 moves from the position closest to the tip of the cover 78 to the drive section 69, the volume of the ultrasonic transmission medium 70 in the cover 78 increases. Then, when the ultrasonic vibrator 67 moves to the drive unit 69 side most, the check valve 72 is closed, and the ultrasonic transmission medium 70 is automatically injected from the ultrasonic transmission medium injection tank 74. When the ultrasonic vibrator 67 performs the reverse movement, the check valve 71 is closed and the ultrasonic transmission medium discharge tank 7 is closed.
The ultrasonic transmission medium 70 is discharged to 6. Since the fourth embodiment is configured as described above, the ultrasonic transmission medium 70 which also serves as a cooling liquid for the ultrasonic vibrator 67 automatically moves with the forward / backward movement of the ultrasonic vibrator 67. When the ultrasonic vibrator 67 generates heat, it can be effectively and easily cooled. Further, even when bubbles are mixed into the ultrasonic transmission medium 70, they are immediately discharged, so that the ultrasonic observation and treatment are not affected. Further, the air bubbles that have entered the ultrasonic transmission medium discharge pipe 75 do not return into the cover 78 due to the action of the check valve. FIG. 9 shows a fifth embodiment, and has the same object as the fourth embodiment. FIG.
In the figure, the same reference numerals are given to portions corresponding to the fourth embodiment. As shown, in the fifth embodiment, a syringe connection portion 79 is provided between the ultrasonic transmission medium injection pipe 73 and the ultrasonic transmission medium injection tank 74. A check valve 80 is provided inside the syringe connection portion 79. In addition, 81 is a syringe. Other configurations are the same as in the fourth embodiment. Next, the operation of the fifth embodiment will be described.
The ultrasonic transmission medium 70 is automatically injected and ejected by the forward and backward movements of the ultrasonic transducer 67 in the same manner as in the fourth embodiment, but in this embodiment, in addition to this, the ultrasonic transducer 6
Even when the device 7 is stopped, the syringe 81 can be connected to the syringe connection portion 79 and the syringe 81 can be operated so that the ultrasonic transmission medium 70 can be injected and discharged. Since the fifth embodiment is configured as described above, in addition to the effects of the fourth embodiment, even when the ultrasonic vibrator 67 does not move back and forth, the ultrasonic vibrator 67 generates heat. In this case, cooling can be performed effectively and easily. Further, even when air bubbles enter the ultrasonic transmission medium 70, they are discharged as needed, so that ultrasonic observation and treatment can be performed more appropriately. The contents described in the above embodiments of the present invention can be considered as the following inventions. 1. An ultrasonic probe that is rotatable with respect to the insertion direction axis and performs a mechanical scan at the distal end of the insertion portion and a distal end protection member that hermetically protects the periphery of the ultrasonic probe are provided. An ultrasonic transmission medium is filled, and a supply port communicating with a supply path for supplying the ultrasonic transmission medium is provided near the apparatus, and a portion corresponding to the supply port is opened when the ultrasonic transmission medium is supplied and closed when not supplied. An intra-cavity ultrasonic diagnostic apparatus provided with a control mechanism, wherein an internal pressure adjusting means for adjusting an ultrasonic transmission medium pressure in the distal end protection member is provided. According to the first aspect, since the intracavity ultrasonic diagnostic apparatus is provided with the internal pressure adjusting means (leak port) for adjusting the pressure of the ultrasonic transmission medium in the distal end protecting member (housing), the ultrasonic transmission is performed. When an ultrasonic transmission medium is supplied through a medium supply pipe and a pipe to pressurize the inside of the tip protection member to reduce bubbles, even if the inside of the tip protection member is overpressurized, the ultrasonic pressure is transmitted by the internal pressure adjusting means. Since the medium can be released to the outside, it is possible to prevent the tip protection member from falling off and to perform appropriate ultrasonic scanning. 2. The internal pressure adjusting means has a discharge port provided with a valve in the middle of the supply path, and the pressure of the ultrasonic transmission medium in the distal end protection member at the discharge port is higher than the mounting strength of the distal end protection member. 2. The ultrasonic diagnostic apparatus according to claim 1, wherein a valve is opened in such a case. According to the second aspect, the internal pressure adjusting means has a discharge port in the middle of the supply path, and the ultrasonic transmission medium pressure in the distal protection member is equal to or higher than the mounting strength of the distal protection member. Since the valve is opened when pressure is reached, the valve can be opened and the ultrasonic transmission medium can be released to the outside even if the inside of the tip protection member is excessively pressurized. Such a situation can be prevented, and appropriate ultrasonic scanning can be performed. As described above, according to the present invention, an internal pressure adjusting means (leak port) for adjusting the pressure of the ultrasonic transmission medium in the distal end protection member (housing) is provided in the intracavity ultrasonic diagnostic apparatus. Since the ultrasonic transmission medium supply conduit, the ultrasonic transmission medium is supplied through the conduit to pressurize the inside of the distal end protection member to reduce bubbles, even if the inside of the front end protection member is overpressurized, Since the ultrasonic pressure transmitting medium can be released to the outside by the internal pressure adjusting means, it is possible to prevent the tip protection member from falling off and to carry out appropriate ultrasonic scanning.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall view of a body cavity ultrasonic diagnostic apparatus according to a first embodiment. FIG. 2 is a sectional view of a distal end portion. FIG. 3 is a sectional view of an endoscope operation unit and a sub operation unit. FIG. 4 is a detailed sectional view of a pressure port. FIG. 5 is a detailed sectional view of a leak port. FIG. 6 is a sectional view of a distal end portion according to a second embodiment. FIG. 7 is a cross-sectional view of an adapter according to a third embodiment. FIG. 8 is a sectional view of an apparatus according to a fourth embodiment. FIG. 9 is a sectional view of an apparatus according to a fifth embodiment. [Description of Signs] 7 Endoscope operation unit 33 Pipe line 38 Leak port 39 Pipe line 48 Set screw 49 Seal member 50 Valve 51 Spring 52 Leak hole 53 Leak base 54 Tube

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-154936 (JP, A) JP-A-8-24348 (JP, A) JP-A-7-236461 (JP, A) JP-A-8- 117235 (JP, A) JP-A-63-147446 (JP, A) JP-A-5-42155 (JP, A) JP-A-4-218145 (JP, A) JP-A-4-126138 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) A61B 8/12

Claims (1)

(57) [Claims 1] An ultrasonic probe which is rotatable at the distal end of an insertion portion with respect to an insertion direction axis and performs a mechanical scan, and hermetically surrounds the ultrasonic probe. A tip protection member for protection is provided, the tip protection member is filled with an ultrasonic transmission medium, and a supply port communicating with a supply path for supplying the ultrasonic transmission medium is provided on the hand side of the apparatus. In a body cavity ultrasonic diagnostic apparatus having a control mechanism that opens and closes when supplying the ultrasonic transmission medium and closes when not supplying the ultrasonic transmission medium, an internal pressure adjusting unit that adjusts the ultrasonic transmission medium pressure in the distal end protection member is provided. Body ultrasonic diagnostic apparatus.