Bronchoscope drug delivery device

Abstract

The present invention provides a bronchoscope drug delivery device, comprising a catheter, a handle arranged at the proximal end of the catheter facing the user, a probe and a light source arranged at the distal end of the catheter facing the patient, and a drug delivery mechanism and a drug delivery control mechanism for controlling the drug delivery mechanism. The drug delivery mechanism comprises a catheter drug delivery section located at the front section of the catheter, two groups of air bags, a drug storage cavity and a step linkage assembly. The drug storage cavity is circumferentially embedded in the catheter drug delivery section, and dense spray holes are opened on the outer wall of the drug storage cavity. The two groups of air bags are arranged on the catheter drug delivery section. By making the filling of the air bag and the spraying of the drug storage cavity into two stages in sequence, on the one hand, the design enables the air bag to be supported on the tracheal wall, providing stability for spraying, and making the positioning accuracy of spraying high. On the other hand, the two groups of air bags can block most of the drugs splashed during spraying, so that the drugs only act on the area where spraying is required, reduce the diffusion of the drugs, improve the accuracy of spraying, and use less dosage for saturated spraying.

Description

Technical Field

[0001] The invention relates to the technical field of bronchoscope medication, in particular to a bronchoscope medication device. Background Art

[0002] Bronchoscope is an important endoscopic examination tool, suitable for observation of bronchial lesions in lobes and subsegments, biopsy sampling, bacteriology, cytology, etc. It is widely used in the diagnosis and treatment of respiratory diseases.

[0003] At present, oral or intravenous administration is commonly used in the treatment of severe pneumonia, tracheal or bronchial tuberculosis, infectious diseases caused by special pulmonary fungi (such as Aspergillus and Mucor), and airway invasion of some malignant tumors. It can alleviate the patient's condition to a certain extent, but the clinical effect is not ideal for some patients. With the rapid development of minimally invasive surgical technology, bronchoscopic drug delivery has been widely used in the above-mentioned respiratory diseases. More and more studies have shown that bronchoscopic drug delivery can make drugs act directly on the lungs and achieve good therapeutic effects. Compared with the original drug delivery method, respiratory endoscopic drug delivery can directly reach the lesion, accurately treat, and take effect quickly, which significantly improves the treatment efficiency.

[0004] In summary, the use of bronchoscopic local drug injection therapy can significantly improve the treatment effect of specific lung diseases, quickly relieve various clinical symptoms, shorten the treatment time, avoid the occurrence of drug resistance, and thus help patients return to normal life as soon as possible and improve their quality of life.

[0005] At present, the main method of drug delivery based on bronchoscope is to directly inject drugs into the bronchoscope tube. Although this method can inject drugs into the trachea, the drugs cannot accurately reach the lesion site, the accuracy of the injection point is uncontrollable, and when the injection volume is too large, the drug flowing in the trachea is likely to cause adverse consequences. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the present invention provides a bronchoscope medication device that solves the problems raised in the above-mentioned background technology.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: a bronchoscope drug delivery device, comprising a catheter, a handle arranged at the proximal end of the catheter facing the user, a probe and a light source arranged at the distal end of the catheter facing the patient, and also comprising a drug delivery mechanism and a drug delivery control mechanism for controlling the drug delivery mechanism, the drug delivery mechanism comprising a catheter drug delivery section located at the distal end of the catheter, two groups of air bags, a drug storage cavity and a step linkage assembly, the drug storage cavity is circumferentially embedded in the catheter drug delivery section, a spray hole is opened on the outer wall of the drug storage cavity, two groups of air bags are arranged on the catheter drug delivery section and are located at the front and rear sides of the drug storage cavity, the drug delivery control mechanism is arranged on the handle, the drug delivery control mechanism provides pressure to the two groups of air bags and the drug storage cavity through the step linkage assembly, and the step linkage assembly provides pressure to the air bags and the drug storage cavity in two stages, the first stage provides pressure to the air bags, and the second stage provides pressure to the drug storage cavity.

[0010] Preferably, the step linkage assembly includes a guide ring, a cylinder body 1, a piston column 1 piston-fitted in the cylinder body 1, a cylinder body 2, a piston column 2 piston-fitted in the cylinder body 2, and a spring. The cylinder body 1 is fixed in the catheter drug delivery section, and the bottom of the cylinder body 2 is connected to the piston column 1 through a limit block. The guide ring is slidably fitted in the catheter drug delivery section, and its top end is connected to the piston column 2 and the bottom end is connected to the drug delivery control mechanism. The spring is sleeved outside the cylinder body 2 and the piston column 2, and is located between the guide ring and the limit block. The cylinder body 1 is connected to the airbag through a hose, and the cylinder body 2 is connected to the drug storage cavity through a hose.

[0011] Preferably, a drug injection port for adding drugs is provided on the outer wall of the drug storage cavity.

[0012] Preferably, the medication control mechanism includes a control wire, a winding disk and a dial wheel, the winding disk is rotatably arranged on the handle, the dial wheel and the winding disk are coaxially connected, one end of the control wire is connected to the guide ring, and the other end is wound on the winding disk.

[0013] Preferably, it also includes a guiding mechanism arranged at the front section of the drug delivery mechanism, wherein the guiding mechanism includes a base, a top seat, two spiral continua, and four spiral elastic skeletons, the two spiral continua are staggered with each other, and the head and tail ends are fixed on the base and the top seat, and the spiral continua are provided with elastic skeleton holes in the spiral ring direction for the four spiral elastic skeletons to pass through, and the four spiral elastic skeletons are in a DNA double helix structure, and the handle is provided with a control mechanism for controlling the guiding mechanism to bend in four directions.

[0014] Preferably, the control mechanism is composed of a front and rear control mechanism and a left and right control mechanism, each of the control mechanisms includes two drive wires, a winding shaft and an adjusting wheel, the adjusting wheel and the winding shaft are coaxially rotatably arranged on the handle, four drive wire holes are circumferentially opened at equal angles on the outer ring of the spiral continuum, one end of the four drive wires of the two groups of control mechanisms are fixed on the top seat, and the other ends pass through the drive wire holes in turn, every two drive wires 180° apart form a group and are wound on the corresponding winding shaft, and the two drive wires in each group are wound in opposite directions on the winding shaft.

[0015] Preferably, a catheter guide section shell is arranged between the base and the top seat and outside the spiral continuous body.

[0016] Preferably, an instrument inner tube is arranged in the catheter, and an instrument insertion tube communicating with the instrument inner tube is arranged on the handle.

[0017] (III) Beneficial effects

[0018] The present invention provides a bronchoscope medication device having the following beneficial effects:

[0019] 1. The bronchoscope drug delivery device divides the filling of the airbag and the spraying of the drug storage cavity into two stages, that is, the drug storage cavity will spray the drug only when the airbag is full of air. On the one hand, the airbag can be supported on the tracheal wall, providing stability for the spraying and high positioning accuracy of the spraying. On the other hand, the two groups of airbags can block most of the drugs splashed during the spraying, so that it only acts on the area where the spraying is needed, reducing the diffusion of the drug, improving the accuracy of the spraying, and using a smaller dose for saturated spraying, reducing harm to the human body.

[0020] 2. The bronchoscope drug delivery device, by adopting a guiding mechanism composed of two spiral continua and four spiral elastic skeletons, effectively improves the torsional stiffness and axial stiffness of the continuum, and well solves the problem of poor axial stiffness of the spring-type continuum and difficulty in achieving precise control. It has excellent comprehensive performance and is convenient for application in the integration of multiple continua. Its length can remain constant when the spiral continuum is bent, solving the problem of the length of the surrounding arrangement changing with the continuum, and at the same time will not occupy the central tool channel of the continuum. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall external axonometric view of the present invention;

[0022] Figure 2 It is a partial axonometric view of the end of the catheter of the present invention;

[0023] Figure 3 A partial half-section view of the end of the catheter of the present invention;

[0024] Figure 4It is a schematic diagram of the guiding mechanism of the present invention;

[0025] Figure 5 It is a schematic diagram of the drug delivery mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the control mechanism of the present invention;

[0027] Figure 7 It is a diagram of the air bag filling state of the present invention;

[0028] Figure 8 This is a diagram of the drug storage chamber spraying state of the present invention.

[0029] In the figure: 1 catheter, 2 handle, 3 drug delivery mechanism, 4 guide mechanism, 5 front and rear control mechanism, 6 left and right control mechanism, 7 drug delivery control mechanism, 30 catheter drug delivery section, 31 air bag, 32 drug storage cavity, 321 spray hole, 322 drug injection port, 33 guide ring, 34 cylinder body 1, 35 piston column 1, 36 cylinder body 2, 37 piston column 2, 38 spring, 39 limit block, 41 base, 42 top seat, 43 spiral continuum, 44 catheter guide section shell, 45 spiral elastic skeleton, 51 drive wire, 52 drive wire hole, 53 take-up shaft, 54 thread groove, 55 adjustment wheel, 71 control wire, 72 take-up disk, 73 dial wheel, 8 probe, 9 light source, 10 display, 11 instrument insertion tube, 12 instrument inner tube. DETAILED DESCRIPTION

[0030] The embodiment of the present invention provides a bronchoscope drug delivery device, such as Figure 1-Figure 8 As shown, it comprises a catheter 1, a handle 2 disposed at the proximal end of the catheter 1 facing the user, a probe 8 and a light source 9 disposed at the distal end of the catheter 1 facing the patient, the probe 8 is electrically connected to a display 10 on the handle 2, and the light source 9 is used to provide light for the probe 8. The above structure is an existing bronchoscope structure, and the specific structural principle will not be repeated here, and reference may be made to a bronchoscope with publication number CN106963331A.

[0031] The present invention further comprises a drug administration mechanism 3 and a drug administration control mechanism 7 for controlling the drug administration mechanism 3 .

[0032] like Figure 1-Figure 3 As shown, the drug delivery mechanism 3 includes a catheter drug delivery section 30 located at the distal end of the catheter 1, two groups of airbags 31, a drug storage cavity 32, and a step linkage assembly. The outer diameter of the catheter 1 is about 6 mm, and the outer diameter of the catheter drug delivery section 30 is consistent with that of the catheter 1, and the two can also be integrally formed. The drug storage cavity 32 is circumferentially embedded in the catheter drug delivery section 30. Dense spray holes 321 are provided on the outer wall of the drug storage cavity 32, and the aperture of the spray hole 321 is less than 1 mm. When the aperture of the spray hole 321 is less than 1 mm, the medicine in the drug storage cavity 32 will not leak out under normal conditions, and will only be sprayed out when under pressure.

[0033] As a preferred solution, the drug storage cavity 32 can be used as a disposable medical consumable. The drug storage cavity 32 and the catheter administration section 30 can be set to be detachable. The catheter administration section 30 is provided with an annular cavity for the drug storage cavity 32 to be inserted, and the drug storage cavity 32 is circumferentially embedded in the annular cavity on the catheter administration section 30. In order to prevent the drug storage cavity 32 from leaking out of the annular cavity of the catheter administration section 30, the width of the open end of the annular cavity is less than one-third of the diameter, and only the open end of the annular cavity corresponding to the spray hole 321 is exposed. When embedded, the drug storage cavity 32 is in an unfilled state, so the drug storage cavity 32 can be embedded in the annular cavity. An air guide tube is provided on the inner side of the drug storage cavity 32. Before the drug storage cavity 32 is embedded, the air guide tube is first connected to the hose of the cylinder body 2 36, and then the drug storage cavity 32 is embedded in the annular cavity. After the drug storage cavity 32 is embedded, the drug storage cavity 32 is filled with liquid medicine through a syringe.

[0034] Two groups of airbags 31 are provided on the catheter drug delivery section 30 and are located at the front and rear sides of the drug storage cavity 32. To avoid the risk of suffocation, the use of annular airbags is avoided as much as possible. Each group of airbags 31 is provided with a plurality of airbags. In this embodiment, one group has 8 airbags 31. When the airbags 31 are filled, there are still gaps between adjacent airbags 31. When spraying the drug, the filling time of the airbags 31 is controlled to be a split second, which will not cause harm to the human body.

[0035] like Figure 1 As shown, the medication control mechanism 7 is arranged on the handle 2, and the medication control mechanism 7 provides pressure to the two groups of airbags 31 and the medicine storage chamber 32 through the step linkage assembly. The order in which the step linkage assembly provides pressure to the airbags 31 and the medicine storage chamber 32 is two stages in sequence, the first stage provides pressure to the airbags 31, and the second stage provides pressure to the medicine storage chamber 32. That is to say, the medicine storage chamber 32 will spray medicine only when the airbags 31 are filled with air. On the one hand, this design allows the airbags 31 to support the tracheal wall, providing stability for the spraying of medicine, and making the positioning accuracy of the spraying of medicine high. On the other hand, the two groups of airbags 31 can block most of the drugs splashed during the spraying of medicine, so that it only acts on the area where the spraying of medicine is required, reducing the diffusion of the medicine, improving the accuracy of the spraying of medicine, and using less dosage for saturated spraying, thereby reducing harm to the human body.

[0036] An instrument inner tube 12 is arranged in the catheter 1, and a plurality of annular support structures can be arranged at intervals between the instrument inner tube 12 and the catheter 1 to form a gap between the two. The drug delivery mechanism 3 and the guide mechanism 4 are both arranged in the gap between the catheter 1 and the instrument inner tube 12, and the handle 2 is provided with an instrument insertion tube 11 connected to the instrument inner tube 12. The technology of inserting the gripper instrument through the instrument inner tube 12 is a conventional technology of the current bronchoscope, and will not be described in detail, and reference may be made to CN106963331A.

[0037] like Figure 3 and Figure 5As shown, the step linkage assembly includes a guide ring 33, a cylinder body 1 34, a piston column 1 35 adapted in the cylinder body 1 34, a cylinder body 2 36, a piston column 2 37 adapted in the cylinder body 2 36, and a spring 38. The guide ring 33 has support surfaces at both ends. The cylinder body 1 34 is fixed in the catheter drug delivery section 30, the cylinder body 1 34 is fixed in shape, the cylinder body 2 36 is suspended, the bottom of the cylinder body 2 36 is connected to the piston column 1 35 through a limit block 39, the guide ring 33 is slidably adapted in the catheter drug delivery section 30, the top end of which is connected to the piston column 2 37, and the bottom end is connected to the drug delivery control mechanism 7, the spring 38 is sleeved outside the cylinder body 2 36 and the piston column 2 37, and is located between the guide ring 33 and the limit block 39, the air cavity inside the cylinder body 1 34 is connected to the air bag 31 through a hose, and the air cavity inside the cylinder body 2 36 is connected to the air guide tube sleeve of the drug storage cavity 32 through a hose. The airbag 31 is flush with the outer wall of the catheter 1 under normal conditions. When the gas in the cylinder 34 enters the airbag 31, the airbag 31 expands to Figure 7 Status shown.

[0038] The medicine storage cavity 32 can be filled from outside the tube. When the medicine storage cavity 32 is filled from outside the tube, a medicine injection port 322 for filling medicine is provided on the outer wall of the medicine storage cavity 32. A sealing plug is provided on the medicine injection port 322 for opening and closing the medicine injection port 322. As a better solution, the sealing plug may not be provided, and the medicine injection port 322 is a layer of rubber membrane, and a syringe is directly inserted into the rubber membrane to stop the liquid.

[0039] The medication control mechanism 7 includes a control wire 71, a reel 72 and a dial 73. The reel 72 is rotatably arranged on the handle 2. The dial 73 and the reel 72 are coaxially connected. One end of the control wire 71 is connected to the guide ring 33, and the other end extends from the gap between the catheter 1 and the inner tube 12 of the device to the handle 2 and is reeled on the reel 72. A spring for resetting can be coaxially arranged on the reel 72. A limit block for limiting the rotation stroke of the reel 72 is arranged in the handle 2. Specifically, a limit block is arranged on the reel 72 and on the handle 2. When the reel 72 rotates to a certain angle (the angle is determined according to the maximum stroke of the guide ring 33), that is, when the piston rod 37 is completely squeezed into the cylinder body 36, the limit block on the reel 72 contacts the limit block on the handle 2. Then the spring is used to reset the reel 72.

[0040] The principle of the drug administration control mechanism 7: When the drug administration section 30 of the catheter reaches the position where the drug needs to be sprayed, the dial wheel 73 is turned. Figure 7As shown, the control wire 71 pulls the guide ring 33 to move. Since a spring 38 is provided between the stop block 39 and the guide ring 33, during the first movement of the guide ring 33, the piston column 2 37 does not squeeze the cylinder body 2 36, but the piston column 1 35 squeezes the cylinder body 1 34, thereby squeezing the gas in the cylinder body 1 34 into the airbag 31, so that the airbag 31 is filled and bulges outward, so that it just contacts the tracheal wall, and is used to position the catheter drug delivery section 30. The dial wheel 73 continues to rotate, and the second state during the dialing process is as shown in FIG. Figure 8 As shown, since the piston column 1 35 is displaced to the limit distance, the guide ring 33 drives the piston column 2 37 to squeeze the cylinder body 2 36, so that the gas in the cylinder body 2 36 is squeezed into the medicine storage chamber 32, and the medicine in the medicine storage chamber 32 is squeezed out of the spray hole 321 by the air pressure to perform the spraying operation.

[0041] After spraying is finished, the guide ring 33 is reset to its original position by the three-fold positioning of the mainspring, the spring 38 and the gas in the airbag 31 returning to the pressure cylinder 34.

[0042] The present invention is based on the above, Figure 1-Figure 4 As shown, it also includes a guiding mechanism 4 arranged at the front section of the drug delivery mechanism 3. At present, the prior art is used to control the turning of the end of the catheter 1, such as CN106963331A, by setting multiple springs to bend the end of the control catheter, but the spring in the bent state has a large reverse stress when resetting, which is easy to injure the tracheal tissue. There is also a discrete joint type continuum structure, which is composed of a series of rigid mechanical joints connected in series by driving wires, and these joints are connected by driving wires to achieve bending or deflection movement. It is essentially a rigid redundant mechanical arm. It has the advantages of small axial compression and good load capacity. However, the large friction between the joints leads to poor constant curvature characteristics, making it difficult to achieve precise control; the overall structure is composed of several units, with poor torsional stiffness; poor compliance, and it is difficult to pass through the narrow and variable natural tracheal cavity with complex paths. Therefore, the guiding mechanism 4 of the present device solves the above problems, and has both excellent kinematic performance and good mechanical properties.

[0043] The guiding mechanism 4 includes a base 41, a top seat 42, two spiral continua 43, and four spiral elastic skeletons 45. The probe 8 and the light source 9 are arranged on the top seat 42. The two spiral continua 43 are interlaced with each other, and the head and tail ends are fixed on the base 41 and the top seat 42. The spiral continua 43 is provided with elastic skeleton holes for the four spiral elastic skeletons 45 to pass through in a spiral ring direction. The four spiral elastic skeletons 45 pass through the elastic skeleton holes in sequence in a DNA double helix structure, and their two ends are also fixed on the base 41 and the top seat 42. The four spiral elastic skeletons 45 are arranged in a DNA double helix to solve the problem that the length of the existing elastic skeleton changes when it is bent and the two ends are difficult to fix, and can effectively improve the axial stiffness and torsional stiffness of the continuum. A catheter guide section housing 44 is arranged outside the spiral continua 43 between the base 41 and the top seat 42. The catheter guide section housing 44 is integrally formed with the catheter 1.

[0044] like Figure 6 As shown, the handle 2 is provided with a control mechanism for controlling the guide mechanism 4 to bend in four directions. The control mechanism is composed of a front-back control mechanism 5 and a left-right control mechanism 6. The front-back control mechanism 5 and the left-right control mechanism 6 have the same structure and respectively control two drive wires 51 180° apart. The drive wire 51 extends from the gap between the catheter 1 and the inner tube 12 of the instrument to the handle 2.

[0045] Each control mechanism includes two drive wires 51, a winding shaft 53 and an adjusting wheel 55. The adjusting wheel 55 and the winding shaft 53 are coaxially rotatably arranged on the handle 2. Four drive wire holes 52 are provided at equal angles in the annular direction on the outer ring of the spiral continuum 43. One end of the four drive wires 51 of the two control mechanisms is fixed on the top seat 42, and the other end passes through the drive wire holes 52 in sequence. Every two drive wires 51 180° apart form a group and are wound on the corresponding winding shaft 53. The two drive wires 51 of each group are wound in opposite directions on the winding shaft 53 and are wound in the thread grooves 54 at both ends of the winding shaft 53. The end points of the thread grooves 54 are provided with drive wire fixing holes for fixing the ends of the drive wires 51. The design of the thread grooves 54 can play a limiting role in the winding process of the drive wires 51, preventing the drive wires 51 from stacking on each other during the winding process, causing increased friction, inaccurate wire length control and other system errors. Due to the opposite rotation directions of the spiral grooves 54 on the reel 53 and the specific winding method of the drive wire 51, the antagonistic movement of the two drive wires 51 can be achieved, achieving the effect of increasing the length of one wire while reducing the length of the other wire, so that each reel 53 can achieve deflection freedom in two directions.

[0046] The two reeling shafts 53 on the front-rear control mechanism 5 and the left-right control mechanism 6 respectively control the front-rear direction and the left-right direction of the top seat 42 .

[0047] The guide mechanism 4 uses a combination of two spiral continua 43 and four spiral elastic skeletons 45, which effectively improves the torsional rigidity and axial rigidity of the continuum, and well solves the problem that the axial rigidity of the spring-type continuum is poor and it is difficult to achieve precise control. It has excellent comprehensive performance and is convenient for integration of multiple continua. Its length can remain constant when the spiral continuum is bent, solving the problem that the length of the surrounding arrangement type changes with the continuum, and at the same time does not occupy the central tool channel (instrument inner tube 12) of the continuum.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bronchoscope medication device, comprising a catheter (1), a handle (2) arranged at the proximal end of the catheter (1) facing the user, a probe (8) and a light source (9) arranged at the distal end of the catheter (1) facing the patient, characterized in that: The invention also comprises a drug delivery mechanism (3) and a drug delivery control mechanism (7) for controlling the drug delivery mechanism (3). The drug delivery mechanism (3) comprises a catheter drug delivery section (30) located at the distal end of the catheter (1), two groups of air bags (31), a drug storage cavity (32), and a step linkage assembly. The drug storage cavity (32) is circumferentially embedded in the catheter drug delivery section (30). A spray hole (321) is provided on the outer wall of the drug storage cavity (32). The two groups of air bags (31) are arranged on the catheter drug delivery section (30) and are located at the front and rear sides of the drug storage cavity (32). The drug administration control mechanism (7) is arranged on the handle (2). The drug administration control mechanism (7) provides pressure to the two groups of air bags (31) and the drug storage cavity (32) through a step linkage assembly. The order in which the step linkage assembly provides pressure to the air bags (31) and the drug storage cavity (32) is two stages. The first stage provides pressure to the air bags (31), and the second stage provides pressure to the drug storage cavity (32). The step linkage assembly comprises a guide ring (33), a cylinder body (34), a piston rod (35) adapted in a piston-like manner in the cylinder body (34), The second cylinder body (36), the second piston column (37) and the spring (38) are piston-fitted in the second cylinder body (36). The first cylinder body (34) is fixed in the drug delivery section (30) of the catheter. The bottom of the second cylinder body (36) is connected to the first piston column (35) through a limit block (39). The guide ring (33) is slidably fitted in the drug delivery section (30) of the catheter. The top end of the guide ring is connected to the second piston column (37) and the bottom end is connected to the drug delivery control mechanism (7). The spring (38) is sleeved outside the second cylinder body (36) and the second piston column (37) and is located at the guide ring. Between the guide ring (33) and the limit block (39), the cylinder body 1 (34) is connected to the air bag (31) through a hose, and the cylinder body 2 (36) is connected to the medicine storage chamber (32) through a hose; the drug administration control mechanism (7) comprises a control wire (71), a winding disk (72) and a dial wheel (73); the winding disk (72) is rotatably arranged on the handle (2); the dial wheel (73) and the winding disk (72) are coaxially connected; one end of the control wire (71) is connected to the guide ring (33), and the other end is wound on the winding disk (72).

2. A bronchoscope medication device according to claim 1, characterized in that: The outer wall of the medicine storage cavity (32) is provided with a medicine injection port (322) for injecting medicine.

3. A bronchoscope medication device according to claim 1, characterized in that: The invention also comprises a guiding mechanism (4) arranged at the front section of the drug delivery mechanism (3), the guiding mechanism (4) comprising a base (41), a top seat (42), two spiral continua (43), and four spiral elastic skeletons (45), the two spiral continua (43) being interlaced with each other, and the head and tail ends being fixed on the base (41) and the top seat (42), the spiral continua (43) being provided with elastic skeleton holes for the four spiral elastic skeletons (45) to pass through in a spiral direction, the four spiral elastic skeletons (45) being in a DNA double helix structure, and the handle (2) being provided with a control mechanism for controlling the guiding mechanism (4) to bend in four directions.

4. A bronchoscope medication device according to claim 3, characterized in that: The control mechanism is composed of a front and rear control mechanism (5) and a left and right control mechanism (6), each of which comprises two driving wires (51), a winding shaft (53) and an adjusting wheel (55), wherein the adjusting wheel (55) and the winding shaft (53) are coaxially rotatably arranged on the handle (2), and four driving wire holes (52) are circumferentially opened at equal angles on the outer ring of the spiral continuous body (43). One end of the four driving wires (51) of the two groups of control mechanisms is fixed on the top seat (42), and the other end passes through the driving wire holes (52) in sequence, and every two driving wires (51) separated by 180 degrees form a group and are wound on the corresponding winding shaft (53), and the two driving wires (51) of each group are wound on the winding shaft (53) in opposite directions.

5. A bronchoscope medication device according to claim 3, characterized in that: A catheter guide section housing (44) is provided between the base (41) and the top seat (42) and outside the spiral continuous body (43).

6. A bronchoscope medication device according to claim 1, characterized in that: An instrument inner tube (12) is arranged in the catheter (1), and an instrument insertion tube (11) connected to the instrument inner tube (12) is arranged on the handle (2).

Images