Early lung cancer respiration detection and sampling equipment

Abstract

The invention relates to the technical field of medical instruments, in particular to early lung cancer breath detection and sampling equipment which comprises a sampling barrel, a barrel cover, a blowing nozzle and the like, the top of the sampling barrel is provided with the barrel cover capable of being rotationally opened, the barrel cover is connected with the replaceable disposable blowing nozzle in an inserted mode, a handle is installed on the side face of the sampling barrel, and the early lung cancer breath detection and sampling equipment further comprises a switching assembly. The switching assembly comprises an inner cylinder, an outer cylinder and a shifting block, the sampling cylinder is composed of the inner cylinder and the outer cylinder which can rotate relatively, the inner cylinder and the outer cylinder are each provided with two sets of air outlets, an air outlet channel can be formed when the air outlets are aligned, and when one set of air outlets rotate to the aligned position, the other set of air outlets are staggered. By adopting the double-layer structural design of the inner cylinder and the outer cylinder, a gas outlet channel can be conveniently switched by rotating the inner cylinder, so that sampled and collected gas is prevented from being mixed, the gas can be immediately used for the second time after being simply and quickly cleaned, the utilization efficiency of sampling equipment is improved, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a respiratory detection and sampling device for early lung cancer. Background Technology

[0002] According to the World Health Organization, 1.5 million people die from lung cancer worldwide each year, and only 10% of patients survive for more than five years after diagnosis. The low survival rate is largely due to late detection, when cancer cells have already spread to an irreversible stage. Currently, hospitals generally use CT scans to detect lung cancer, which is not only expensive but also has a high false-positive rate.

[0003] However, with the development of science and technology, research has found that lung cancer patients exhale various volatile organic compounds (VOCs) during breath tests. The composition of VOCs varies depending on the patient's condition. By collecting volatile organic compounds from patients' breath samples, lung cancer can be diagnosed. Currently, existing breath testing and sampling equipment typically only allows for a single sample per device, leading to increased sampling and testing costs and limiting practical applications. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a respiratory detection and sampling device for early lung cancer.

[0005] The technical implementation of the present invention is as follows: an early lung cancer respiratory detection and sampling device, comprising a sampling tube, a tube cover, a mouthpiece, and a handle. The top of the sampling tube is provided with a rotatable and openable tube cover, and a replaceable disposable mouthpiece is inserted into the tube cover. A handle is installed on the side of the sampling tube. It also includes a switching component, which comprises an inner tube, an outer tube, and a lever. The sampling tube is composed of an inner tube and an outer tube that can rotate relative to each other. Both the inner tube and the outer tube have two sets of air outlets. When the air outlets are aligned, they can form an air outlet channel. When one set of air outlets is rotated to the aligned position, the other set of air outlets is offset. A lever is fixedly connected to the inner tube and extends horizontally through the outer tube. A strip-shaped through groove is provided on the side of the outer tube for the lever to pass through and slide.

[0006] In a preferred embodiment of the present invention, a fixing base is also included, wherein a double fixing base is installed on the outside of the sampling tube, and the fixing base is used to provide support and fixation for the gas storage tank.

[0007] In a preferred embodiment of the present invention, a retaining ring is also included. An arc-shaped retaining ring is provided at the connection between the sampling tube and the tube cover. One end of the retaining ring is rotatably connected to the sampling tube, and the other end is detachably installed on the sampling tube by means of a snap-fit.

[0008] In a preferred embodiment of the present invention, a protective cover is also included. The outer side of the sampling tube is provided with a protective cover that can cover the tube cap and the mouthpiece together. The protective cover can rotate relative to the sampling tube.

[0009] In a preferred embodiment of the present invention, a cleaning assembly is further included. The cleaning assembly includes a screw, a cleaning block, a connecting rod, and a handle. The screw is movably installed at the central axis position inside the sampling cylinder. The screw is movably connected to the sampling cylinder by a threaded connection. The screw can move up and down synchronously with rotation. A cleaning block with its surface in contact with the inner wall of the inner cylinder is installed at the top of the screw. The bottom end of the screw extends through the sampling cylinder and is fixedly connected to two U-shaped connecting rods of different lengths on both sides. A handle is installed at the end of the connecting rod.

[0010] In a preferred embodiment of the present invention, a water outlet component is further included. The water outlet component includes an adjusting ring and a vertical rod. The adjusting ring is rotatably installed at the bottom of the sampling tube. The adjusting ring and the bottom of the sampling tube are provided with matching arc-shaped through grooves. The vertical rod is fixedly installed at the bottom of the adjusting ring.

[0011] In a preferred embodiment of the present invention, a positioning component is further included. The positioning component includes a sleeve, a first elastic element, and a rod. The sleeve is slidably connected to the bottom end of the vertical rod. The first elastic element is connected between the sleeve and the vertical rod. A rod extending vertically toward the bottom surface of the sampling tube is installed on the outside of the sleeve. A positioning hole adapted to the rod is opened on the bottom surface of the sampling tube.

[0012] In a preferred embodiment of the present invention, a drainage assembly is further included. The drainage assembly includes a guide frame, a slider, a second elastic element, a wedge, a torsion spring, a guide post, a movable ring, a third elastic element, and a support rod. The bottom of the sampling tube is provided with a through outlet. A guide frame is fixedly installed at the outlet on the inner side of the sampling tube. A slider that can block the outlet is slidably connected inside the guide frame. A second elastic element is connected between the slider and the guide frame. A wedge is rotatably installed on the guide frame. A torsion spring is connected between the wedge and the guide frame. A vertical guide post is installed at the bottom of the sampling tube. A coaxial movable ring is movably connected to the top of the guide post through the third elastic element. When the cleaning block is pressed down by the screw, it can push the movable ring to slide down along the guide post. A support rod extending horizontally toward the inclined surface of the wedge is installed on the movable ring. The support rod can push the wedge to move the slider away from the outlet.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The present invention adopts a double-layer structure design of inner and outer cylinders, which allows for convenient switching of the gas outlet channel by rotating the inner cylinder, thereby avoiding confusion of the sampled and collected gases. It can be reused immediately after simple and quick cleaning, improving the utilization efficiency of the sampling equipment and reducing costs.

[0014] 2. Through the cooperation of components such as screw and cleaning block, the present invention can conveniently control the cleaning block by rotating the handle, so that it can rotate back and forth along the inner wall of the sampling tube for thorough and rapid wiping and cleaning.

[0015] 3. By incorporating a water outlet component and a liquid drainage component, this invention can conveniently and quickly discharge wastewater and waste liquid during the initial rinsing and secondary wiping cleaning processes, effectively improving cleaning efficiency and enabling the equipment to complete cleaning quickly for convenient subsequent use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the switching component of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the fixing base of the present invention.

[0019] Figure 4 This is a front view of the retaining ring of the present invention.

[0020] Figure 5 This is a side view of the retaining ring of the present invention.

[0021] Figure 6 This is a three-dimensional structural diagram of the protective cover of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the cleaning component of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the water outlet component of the present invention.

[0024] Figure 9 This is a three-dimensional structural diagram of the positioning component of the present invention.

[0025] Figure 10 This is a three-dimensional structural diagram of the drainage component of the present invention.

[0026] Figure 11 This is a partially enlarged view of the drainage component of the present invention.

[0027] The above-mentioned attached figures include the following reference numerals: 1. Sampling cylinder; 2. Cylinder cover; 3. Mouthpiece; 4. Handle; 5. Switching assembly; 51. Inner cylinder; 52. Outer cylinder; 53. Air outlet; 54. Toggle block; 6. Fixing base; 7. Snap ring; 8. Protective cover; 9. Cleaning assembly; 91. Screw; 92. Cleaning block; 93. Connecting rod; 94. Handle; 10. Water outlet assembly; 101. Adjusting ring; 102. Arc-shaped. 103. Through groove, 11. Vertical rod, 11. Positioning assembly, 111. Sleeve, 112. First elastic element, 113. Insert rod, 114. Positioning hole, 12. Drainage assembly, 121. Water outlet, 122. Guide frame, 123. Slider, 124. Second elastic element, 125. Wedge block, 126. Torsion spring, 127. Guide column, 128. Movable ring, 129. Third elastic element, 1210. Support rod. Detailed Implementation

[0028] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0029] Example 1

[0030] A respiratory detection and sampling device for early lung cancer, such as Figures 1-2 As shown, the device includes a sampling tube 1, a tube cover 2, a mouthpiece 3, and a handle 4. The sampling tube 1 has a rotatable tube cover 2 at the top. An interface is located at the center of the top of the tube cover 2, through which a replaceable disposable mouthpiece 3 is inserted. The mouthpiece 3 is funnel-shaped. A handle 4 is bolted to the side of the sampling tube 1. Two handles 4 are provided for easy gripping. The device also includes a switching assembly 5 for switching the air outlet channel. The switching assembly 5 includes an inner tube 51, an outer tube 52, and a lever 54. The sampling tube 1 consists of a relatively rotatable inner tube 51 and an outer tube 52. Two sets of air outlets 53 are provided on each of the two sets of air outlets 53. The two sets of air outlets 53 are at different heights. When the air outlets 53 are aligned, they can form an air outlet channel. When one set of air outlets 53 is rotated to the aligned position, the other set of air outlets 53 is staggered. The outer side of the air outlets 53 of the outer cylinder 52 is sealed with a flexible hose that communicates with the gas storage tank. The outer side of the inner cylinder 51 is fixedly connected by welding to a lever 54 that extends horizontally through the outer cylinder 52. The side of the outer cylinder 52 is provided with a strip-shaped groove for the lever 54 to pass through and slide. When the lever 54 is located at both ends of the strip-shaped groove, it corresponds to the alignment position of the two sets of air outlets.

[0031] like Figures 3-6As shown, it also includes a fixing base 6, a retaining ring 7, and a protective cover 8. The sampling tube 1 is bolted to the outside of the double-position fixing base 6. The fixing base 6 consists of two sets of bases with circular grooves symmetrically arranged at the bottom and arc-shaped clamping blocks that open to both sides at the top. The fixing base 6 is used to provide support and fixation for the gas storage tank. A semi-circular retaining ring 7 is provided at the connection between the sampling tube 1 and the tube cover 2. One end of the retaining ring 7 is rotatably connected to the sampling tube 1, and the other end is detachably installed on the sampling tube 1 by snapping. When the movable end of the retaining ring 7 is snapped with the sampling tube 1, it can restrict the tube cover 2 from rotating and opening. The outer side of the sampling tube 1 is hinged with a protective cover 8 that can cover the tube cover 2 and the nozzle 3 together. The protective cover 8 can rotate relative to the sampling tube 1 and is made of transparent material.

[0032] When breathalyzer testing is required, insert the disposable mouthpiece 3 into the interface above the cap 2 and secure it. Then, rotate the cap 2 to close it, and rotate the retaining ring 7 so that its movable end engages and secures it on the sampling tube 1. After the retaining ring 7 is fixed, its inner side fits against the connection between the cap 2 and the sampling tube 1, generating friction to prevent the cap 2 from rotating and opening. Place the two sets of gas storage tanks into the double-position fixing seat 6 on the outside of the sampling tube 1, and seal them to the two sets of air outlets 53 on the outer cylinder 52 through hoses. Rotate the lever 54 to move it to one end of the strip groove, and the inner cylinder 51 rotates relative to the outer cylinder 52. One set of air outlets 53 aligns to form an air outlet channel. The other air outlet 53 is blocked. Then, the patient blows air into the mouthpiece 3. The gas produced by breathing can pass through the mouthpiece 3, the cap 2, the sampling tube 1 and the hose and be sent into one of the gas storage tanks. Then, the lever 54 can be rotated to move it to the other end, blocking the air outlet 53 of the gas storage tank and opening the other air outlet 53. Then, the mouthpiece is removed, the cap 2 is rotated to quickly clean the sampling tube 1, and a new disposable mouthpiece 3 can be replaced for the next test. In addition, when the mouthpiece 3 is inserted into the cap 2 and not in use, the protective cover 8 can be rotated to cover the mouthpiece 3 and the cap 2 together to protect them.

[0033] Example 2

[0034] Based on Example 1, such as Figure 7As shown, it also includes a cleaning assembly 9 for cleaning the inside of the sampling tube. The cleaning assembly 9 includes a screw 91, a cleaning block 92, a connecting rod 93, and a handle 94. The screw 91 is movably installed at the central axis position inside the sampling tube 1. The screw 91 is movably connected to the sampling tube 1 by a threaded connection. The screw 91 can move up and down synchronously with rotation. The top of the screw 91 is fixedly installed with a disc-shaped cleaning block 92 whose surface is in contact with the inner wall of the inner tube 51 by a snap-fit. The cleaning block 92 has a through hole to allow liquid to pass through. The bottom end of the screw 91 extends through the sampling tube 1 and is welded with U-shaped connecting rods 93 of different lengths on both sides. The opening of the U-shaped connecting rod 93 faces upward and its long part is parallel to the screw and extends upward to the height of the tube cover 2. The top of the connecting rod 93 is fixedly connected to the handle 94 by a sleeve. The surface of the handle 94 is provided with anti-slip texture.

[0035] like Figure 8 As shown, it also includes an outlet component 10 for facilitating wastewater outflow. The outlet component 10 includes an adjusting ring 101 and a vertical rod 103. The adjusting ring 101 is rotatably installed at the bottom of the sampling tube 1. The adjusting ring 101 and the bottom of the sampling tube 1 are provided with matching arc-shaped through grooves 102. There are two sets of arc-shaped through grooves 102, which are centrally symmetrical. The bottom of the adjusting ring 101 is fixedly installed with a downwardly extending vertical rod 103 by screws. The bottom end of the vertical rod 103 is provided with a protruding ring.

[0036] like Figure 9 As shown, it also includes a positioning component 11 for limiting the rotation of the adjusting ring 101. The positioning component 11 includes a sleeve 111, a first elastic element 112, and a rod 113. The sleeve 111 is slidably connected to the bottom end of the vertical rod 103. The sleeve 111 can slide up and down along the vertical rod 103. The first elastic element 112 is connected between the sleeve 111 and the vertical rod 103. The first elastic element 112 is a stainless steel compression spring. An L-shaped rod 113 with its end extending vertically toward the bottom surface of the sampling cylinder 1 is welded to the outside of the sleeve 111. The bottom surface of the sampling cylinder 1 is provided with a positioning hole 114 that matches the rod 113. The positioning holes 114 are evenly spaced along the circumference of the bottom surface of the sampling cylinder 1.

[0037] After sampling is completed in sampling tube 1, the inside of sampling tube 1 needs to be cleaned in time. First, rotate the lever 54 to the middle position of the strip groove so that the two sets of air outlets 53 are staggered and blocked. Grasp the handle 94 to drive the connecting rod 93 to rotate, so that it moves downward to the bottom while maintaining rotation. Pull down the sleeve 111 so that the insert rod 113 on it is disengaged from the positioning hole 114. The first elastic element 112 is compressed by force. Then rotate the vertical rod 103 to align the adjusting ring 101 with the arc-shaped through groove 102 on the bottom surface of sampling tube 1 to facilitate the flow of wastewater. The water output can be flexibly adjusted according to the overlapping area of ​​the arc-shaped through groove 102. After selecting a suitable water output, the insert rod 113 rises under the reset action of the first elastic element 112 and is reinserted into the positioning hole 114 on the bottom surface of sampling tube 1 to fix it and restrict the rotation of the adjusting ring 101. Then the tube cover 2 can be opened to rinse the inside of sampling tube 1 to complete the initial cleaning.

[0038] like Figure 10 and Figure 11 As shown, it also includes a drainage assembly 12 for automatically discharging waste liquid. The drainage assembly 12 includes a guide frame 122, a slider 123, a second elastic element 124, a wedge 125, a torsion spring 126, a guide post 127, a movable ring 128, a third elastic element 129, and a support rod 1210. The bottom of the sampling tube 1 is provided with a through square outlet 121. There are four sets of outlets 121, which are symmetrical about the bottom surface of the sampling tube 1. The guide frame 122, with an area twice that of the outlet 121, is welded to the inner side of the sampling tube 1. A slider 123 that can block the outlet 121 is slidably connected inside the guide frame 122. A second elastic element 124 is connected between the slider 123 and the guide frame 122. The second elastic element 124 is a stainless steel compression spring. Under the action of the second elastic element 124, the slider 123 is held at the outlet 121 to limit the liquid flow. The body flows out, and a right-angled triangular wedge 125 with its inclined surface facing the upper outer side is rotatably mounted on the guide frame 122. A torsion spring 126 is connected between the wedge 125 and the guide frame 122. The wedge 125 is kept in a horizontal state under the action of the torsion spring 126. A guide post 127 extending vertically inward and upward is welded to the bottom of the sampling tube 1. The guide post 127 is located outside the outlet 121 and the two correspond one-to-one. The top of the guide post 127 is movably connected to a coaxial movable ring 128 through a third elastic element 129. The inner diameter of the movable ring 128 is not less than that of the guide post 127. When the cleaning block 92 is pressed down with the screw 91, it can push the movable ring 128 to slide vertically down along the guide post 127. An L-shaped support rod 1210 extending horizontally towards the inclined surface of the wedge 125 is welded on the movable ring 128. The support rod 1210 can push the wedge 125 to move the slider 123 away from the outlet 121.

[0039] After initial cleaning, the vertical rod 103 is rotated to completely disengage the adjusting ring 101 from the arc-shaped groove 102 on the bottom surface of the sampling cylinder 1. Then, a disinfectant solution is added to the sampling cylinder 1. Next, the handle 94 is pulled to rotate the connecting rod 93 and the screw 91. As the screw 91 rotates, it moves up and down, stirring the solution. Simultaneously, the side surface of the cleaning block 92 rubs against the inner wall of the sampling cylinder 1, thoroughly cleaning it to ensure the cleanliness of the inside of the sampling cylinder 1. When the cleaning block 92 moves down to the bottom, it presses down the movable ring 128, causing it to move downwards along the guide post 127. The third elastic element 129 is compressed, and as the support rod 1210 moves downwards, it squeezes and pushes the wedge block 125 to rotate downwards while moving horizontally, causing the slider 12... 3. Slide horizontally along the guide frame 122. The second elastic element 124 is compressed by force. The slider 123 moves away from the outlet 121 to facilitate the discharge of waste liquid. After the support rod 1210 passes the wedge block 125, the wedge block 125 is reset to the horizontal state under the action of the torsion spring 126. The support rod 1210 can be inserted under the wedge block 125 to keep the cleaning component at the bottom for convenient sampling. Alternatively, the screw 91 can be rotated to move it upward. The support rod 1210 pushes the wedge block 125 upward to rotate in the opposite direction to facilitate the passage of the support rod 1210. After the support rod 1210 moves to the top of the wedge block 125, it resets again. In this way, the liquid can be fully contacted with the sampling tube 1 while the waste liquid is gradually discharged by itself during the cleaning process, further improving the cleaning efficiency and facilitating secondary use.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An early lung cancer breath detection and sampling device, comprising a sampling cylinder (1), a cylinder cover (2), a mouthpiece (3) and a handle (4), the top of the sampling cylinder (1) is provided with a rotatable opening cylinder cover (2), the cylinder cover (2) is connected with a replaceable disposable mouthpiece (3) by insertion, and the side of the sampling cylinder (1) is provided with a handle (4); characterized in that: It also includes a switching component (5), which includes an inner cylinder (51), an outer cylinder (52) and a lever (54). The sampling cylinder (1) is composed of an inner cylinder (51) and an outer cylinder (52) that can rotate relative to each other. Both the inner cylinder (51) and the outer cylinder (52) are provided with two sets of air outlets (53). When the air outlets (53) are aligned, they can form an air outlet channel. When one set of air outlets (53) is rotated to the aligned position, the other set of air outlets (53) is staggered. The inner cylinder (51) is fixedly connected with a lever (54) that extends horizontally through the outer cylinder (52). The outer cylinder (52) has a strip-shaped through groove on its side for the lever (54) to pass through and slide. ​ 2. An early lung cancer breath test and sample device according to claim 1, characterised in that: It also includes a fixing seat (6), and a double fixing seat (6) is installed on the outside of the sampling tube (1). The fixing seat (6) is used to provide support and fixation for the gas storage tank.

3. The early lung cancer detection and sampling device of claim 1, wherein: It also includes a retaining ring (7). An arc-shaped retaining ring (7) is provided at the connection between the sampling tube (1) and the tube cover (2). One end of the retaining ring (7) is rotatably connected to the sampling tube (1), and the other end is detachably installed on the sampling tube (1) by a snap-fit ​​method.

4. The early lung cancer detection and sampling device of claim 1, wherein: It also includes a protective cover (8), which is provided on the outside of the sampling tube (1) to cover the tube cover (2) and the mouthpiece (3) together. The protective cover (8) can rotate relative to the sampling tube (1).

5. The early lung cancer detection and sampling device of claim 1, wherein: It also includes a cleaning assembly (9), which includes a screw (91), a cleaning block (92), a connecting rod (93), and a handle (94). The screw (91) is movably installed at the central axis position inside the sampling tube (1). The screw (91) is movably connected to the sampling tube (1) by a threaded connection. The screw (91) can move up and down synchronously with rotation. The top of the screw (91) is equipped with a cleaning block (92) whose surface is in contact with the inner wall of the inner tube (51). The bottom end of the screw (91) extends through the sampling tube (1) and is fixedly connected to U-shaped connecting rods (93) of different lengths on both sides. The end of the connecting rod (93) is equipped with a handle (94).

6. The early lung cancer respiratory detection and sampling device according to claim 5, characterized in that: It also includes a water outlet assembly (10), which includes an adjusting ring (101) and a vertical rod (103). The bottom of the sampling tube (1) is rotatably mounted with the adjusting ring (101). The bottom of the adjusting ring (101) and the sampling tube (1) are provided with matching arc-shaped through grooves (102). The bottom of the adjusting ring (101) is fixedly mounted with the vertical rod (103).

7. The early lung cancer respiratory detection and sampling device according to claim 6, characterized in that: It also includes a positioning component (11), which includes a sleeve (111), a first elastic element (112) and a rod (113). The bottom end of the vertical rod (103) is slidably connected to the sleeve (111), and the first elastic element (112) is connected between the sleeve (111) and the vertical rod (103). The sleeve (111) is equipped with a rod (113) extending vertically to the bottom surface of the sampling tube (1) at its end. The bottom surface of the sampling tube (1) is provided with a positioning hole (114) that is adapted to the rod (113).

8. An early lung cancer detection and sampling device according to claim 7, wherein: It also includes a drainage assembly (12), which includes a guide frame (122), a slider (123), a second elastic element (124), a wedge (125), a torsion spring (126), a guide post (127), a movable ring (128), a third elastic element (129), and a support rod (1210). The bottom of the sampling tube (1) is provided with a through outlet (121). The guide frame (122) is fixedly installed at the outlet (121) on the inner side of the sampling tube (1). A slider (123) that can block the outlet (121) is slidably connected inside the guide frame (122). The second elastic element (124) is connected between the slider (123) and the guide frame (122). A wedge (125) is rotatably mounted on the guide frame (122). A torsion spring (126) is connected between the wedge (125) and the guide frame (122). A vertical guide post (127) is installed at the bottom of the sampling tube (1). A coaxial movable ring (128) is movably connected to the top of the guide post (127) through a third elastic element (129). When the cleaning block (92) is pressed down with the screw (91), it can push the movable ring (128) to slide down along the guide post (127). A support rod (1210) is installed on the movable ring (128) that extends horizontally toward the inclined surface of the wedge (125). The support rod (1210) can push the wedge (125) to drive the slider (123) to move away from the outlet (121).

Images