Ventilation protection device for preventing sterile instrument from being exposed and polluted during operation

Abstract

The invention discloses a ventilation protection device for preventing sterile instruments from being exposed and polluted during operation. Comprising an air treatment device fixed to the lower surface of the surgical instrument table, an air supply plenum chamber connected with an air outlet of the air treatment device through an air supply pipeline, and an air supply outlet formed in the air supply plenum chamber and used for supplying air to the position above the surgical instrument table. The air return plenum chamber is connected with the air inlet of the air treatment device through an air return pipeline, the air return opening is formed in the air return plenum chamber and is opposite to the air supply opening, and each of the air supply pipeline and the air return pipeline comprises a flexible joint, a telescopic horizontal air pipe, an elbow pipe and a telescopic vertical air pipe which are connected in sequence. On the basis that the overall structure of an existing surgical instrument table does not need to be changed, a locally stable and clean airflow barrier can be built above the instrument table.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a ventilation protection device to prevent exposure and contamination of sterile instruments during surgery. Background Technology

[0002] In modern surgery, intraoperative infection control is a key factor in ensuring surgical success and postoperative recovery. In recent years, with the development of modern medical technology, surgery is transitioning from traditional open, large-incision procedures to minimally invasive, refined laparoscopic surgeries. While surgical incisions are significantly smaller and the body's natural protective barrier is less compromised, the requirements for the cleanliness of surgical instruments are actually more stringent. Therefore, the core of aseptic protection in the operating room is no longer limited to a single surgical incision but has expanded to include the surrounding surgical instrument table. As essential medical supplies used during surgery, the contamination control of sterile instrument packs before and during use directly affects postoperative infection rates and surgical success rates. Currently, operating rooms generally employ vertical laminar flow systems to maintain air cleanliness, organizing airflow over a large space through top-supply and floor-return air. However, relevant studies have shown that even in operating rooms that meet cleanliness requirements, there may still be turbulence and backflow in some areas above the instrument table. In areas such as the operating table and instrument table, due to factors such as personnel activities, air disturbance, equipment operation, and electrosurgical fumes, there may be a certain amount of particulate matter, dust, and pathogens in the air. These particulate matter and microbial pollutants can settle onto the instrument surface by means of airflow, thereby causing certain contamination to the surgical instruments.

[0003] Existing surgical instrument tables are typically completely open structures, serving only as platforms for instrument placement and transport, lacking any localized protective features. Once the surgical instrument packs are opened, their contents are directly exposed to the operating room air environment, making them highly susceptible to the deposition of airborne pollutants. Current vertical laminar flow air conditioning systems in operating rooms are insufficient to effectively protect the space above them, especially under conditions of frequent personnel movement, thermal plumes from surgical lights, and electrosurgical fumes, significantly increasing the risk of contamination. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide a ventilation protection device to prevent exposure and contamination of sterile instruments during surgery. Without changing the overall structure of the existing surgical instrument table, it can create a localized, stable, and clean airflow barrier above the instrument table.

[0005] Technical solution: To achieve the above object, the ventilation protection device comprises an air treatment device fixed to the lower surface of the surgical instrument table, an air supply static pressure box connected with the air outlet of the air treatment device through an air supply pipeline, an air supply opening provided on the air supply static pressure box and used for air supply above the surgical instrument table, an air return static pressure box connected with the air inlet of the air treatment device through an air return pipeline, and an air return opening provided on the air return static pressure box and opposite to the air supply opening, wherein the air supply pipeline and the air return pipeline each comprise a soft joint, a telescopic horizontal air pipe, an elbow pipe and a telescopic vertical air pipe connected in sequence.

[0006] Optionally, the vertical air pipe comprises a first air pipe, a second air pipe and a third air pipe coaxially sleeved in sequence from top to bottom, the inner diameters of the first air pipe, the second air pipe and the third air pipe are sequentially reduced, the top inner surface of the first air pipe and the second air pipe is provided with an elastic locking piece, and the bottom outer surface of the second air pipe and the third air pipe is provided with positioning blind holes which are arranged at equal intervals, and the length of the vertical air pipe is adjusted by sliding and clamping the elastic locking piece in the positioning blind holes.

[0007] Optionally, the elastic locking piece is a spring pin or a ball head plunger.

[0008] Optionally, the bottom outer surface of the second air pipe and the third air pipe is provided with a positioning reinforcing rib, and the positioning blind holes are arranged on the positioning reinforcing rib at equal intervals.

[0009] Optionally, the air treatment device is sequentially provided with an ultraviolet lamp sterilization lamp tube with polished aluminum film around, a photocatalyst filter screen, a fan, a coarse filter screen, a HEPA filter screen, an activated carbon filter screen and a sound-absorbing static pressure box along the air flow direction.

[0010] Optionally, the inner surface of the sound-absorbing static pressure box is provided with sound-absorbing material.

[0011] Optionally, it further comprises an environment perception module, a control module and a control panel, the control panel is used for state parameter display and man-machine interaction control, the control module adjusts the fan speed and the power of the ultraviolet lamp sterilization lamp tube according to the monitoring data of the environment perception module, and the environment perception module comprises a particulate matter sensor, a volatile organic compound sensor and a human body infrared induction sensor.

[0012] Optionally, the state parameters include particulate matter concentration, volatile organic compound concentration, wind speed and power state.

[0013] Optionally, the man-machine interaction control includes switching between automatic mode and manual mode, fan speed adjustment, ultraviolet lamp sterilization lamp tube switch, alarm threshold setting, language setting, volume setting and export of operation report.

[0014] Optionally, the air supply opening and the air return opening are both strip-slit type air inlets.

[0015] Compared with the prior art, the present application has the following remarkable advantages: the present application can establish a local stable and clean airflow barrier above the instrument table without changing the overall structure of the existing surgical instrument table, can be conveniently disassembled and used, and intelligently responds to meet the temporary or long-term application requirements in multiple surgical scenarios; the present application is used to provide local airflow protection for sterile instruments during surgery, prevent suspended pollutants from settling to cause instrument pollution, and improve the safety level of surgery. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a top view of the present application; Figure 3 is an installation schematic diagram of the present application; Figure 4 is an implementation effect diagram of the present application; Figure 5 is a control logic schematic diagram of the present application. DETAILED DESCRIPTION

[0017] The technical solutions of the present application will be further described below in combination with the drawings.

[0018] The ventilation protection device in the present application includes an air treatment device 12, a supply air static pressure box 3, a return air static pressure box 4, a supply air duct and a return air duct, the air treatment device 12 is fixed to the lower surface of the surgical instrument table, the ventilation protection device is fixed to the lower surface of the instrument table through mechanical fixing devices such as angle steels, is firmly and reliably installed, and does not occupy the space of the instrument table top.

[0019] The supply air static pressure box 3 is connected with the air outlet of the air treatment device 12 through the supply air duct, the supply air port 1 is opened on the supply air static pressure box 3, the supply air port 1 is used to supply air to the upper side of the surgical instrument table, the return air static pressure box 4 is connected with the air inlet of the air treatment device 12 through the return air duct, the return air port 2 is opened on the return air static pressure box 4, the return air port 2 is oppositely arranged with the supply air port 1, and the supply air port and the return air port are both strip slit type air ports. The present application realizes local protection and circulating air supply of the space above the operating table, sends out clean airflow through the strip slit type supply air port 1, recycles through the strip slit type return air port 2 on the opposite side, forms a stable directional airflow protection layer, and effectively blocks the settlement of suspended particulate matter; the present application adopts the circulating air path design combining supply air and return air, compared with the pure supply air mode, can effectively reduce the energy consumption of the fan, and allows the use of lower supply air speed to realize protection, reduces the interference to the operation of the instrument table.

[0020] The air supply pipeline and the air return pipeline each comprise a flexible joint 10, a telescopic horizontal air pipe 9, an elbow pipe 8 and a telescopic vertical air pipe connected in sequence; the vertical air pipe comprises a first air pipe 7, a second air pipe 6 and a third air pipe 5 coaxially sleeved in sequence from top to bottom, the inner diameters of the first air pipe 7, the second air pipe 6 and the third air pipe 5 are sequentially reduced, the top inner surface of the first air pipe 7 and the second air pipe 6 is provided with an elastic locking piece, the elastic locking piece is a spring pin or a ball plunger; the bottom outer surface of the second air pipe 6 and the third air pipe 5 is provided with positioning blind holes opened at equal intervals, the length of the vertical air pipe is adjusted by sliding and clamping the elastic locking piece in the positioning blind hole. In an embodiment, the bottom outer surface of the second air pipe and the third air pipe is provided with a positioning reinforcing rib, and the positioning blind holes are opened at equal intervals on the positioning reinforcing rib. The air supply port and the air return port can be three-dimensionally adjusted, the horizontal and vertical positions of the air supply port and the air return port can be flexibly adjusted through the horizontal air pipe 9 and the liftable second air pipe 6 and the third air pipe 5, so as to adapt to different sizes of instrument tables and instrument placement requirements.

[0021] The air treatment device 12 is sequentially provided with an ultraviolet lamp sterilization lamp tube 13 with a polished aluminum film 14 around, a photocatalyst filter screen 15, a fan 16, a coarse filter screen 17, a HEPA filter screen 18, an activated carbon filter screen 19 and a noise reduction static pressure box 20 in the direction of air flow, and the inner surface of the noise reduction static pressure box is provided with sound absorbing material.

[0022] It also comprises an environment sensing module 21, a control module 22 and a control panel 23, the control panel is used for state parameter display and man-machine interaction control, the state parameters include particulate matter concentration, volatile organic compound concentration, fan speed and power state; the man-machine interaction control includes switching between automatic mode and manual mode, fan speed adjustment, ultraviolet lamp sterilization lamp tube switch, alarm threshold setting, language setting, volume setting and export operation report. The control module adjusts the fan speed and the power of the ultraviolet lamp sterilization lamp tube according to the monitoring data of the environment sensing module; the environment sensing module comprises a particulate matter sensor, a volatile organic compound sensor and a human body infrared sensing sensor.

[0023] The present application can realize multiple purification and low noise operation, the air treatment device 12 integrates multi-stage filtration, sterilization and noise reduction functions, can ensure the cleanliness of the output air, and effectively control the operation noise through the noise reduction static pressure box 20 and the fan 16; the present application realizes intelligent response and precise protection, automatically adjusts the air curtain intensity by real-time sensing of pollution sources (such as electrotome smoke and personnel activity) in the operating environment, realizes the upgrade from “static protection” to “dynamic active defense”, and the protection effect is more accurate and efficient. The present application can realize data visualization, can record the environmental parameters and equipment operation state in the operation process, generate a report file, provide data support for postoperative infection tracing and operating room quality management, meet the development trend of modern smart hospital, and is especially suitable for laparoscope, microscope, neurosurgery and other operation scenes with high requirements for instrument cleanliness.

[0024] The present application forms a directional clean airflow protection barrier by air supply and return air, and has the functions of intelligent response to pollution events and operation data recording, effectively blocks the settlement of suspended particulate matter, and the circulating air path design can reduce the energy consumption of the fan and the air supply speed.

[0025] Specifically, the air treatment device 12 is connected with the telescopic horizontal air pipe 9 through the flexible joint 10, the telescopic horizontal air pipe 9 is connected with the first air pipe 7 through the 90° elbow 8, the first air pipe 7 is connected with the second air pipe 6 and the third air pipe 5 in turn, and the third air pipe 5 is connected with the air supply static pressure box 3 and the return air static pressure box 4 respectively. After the air is purified by the air treatment device 12, it enters the air supply static pressure box 3 through a series of air pipes, the air supply static pressure box 3 provides a static pressure stable flow environment for the inlet air flow, so that the air flow sent out through the slot type air outlet 1 is uniform and stable. The air flow sent out from the slot type air outlet 1 is sucked into the slot type air return port 2, and then returns to the air treatment device 12 through a series of air pipes and accessories. The upper surfaces of the air supply static pressure box 3 and the return air static pressure box 4 are provided with handrails 11, which are convenient for medical staff to take and move the device. The environmental perception module 21, the control module 22 and the control panel 23 are integrated in the ventilation protection device.

[0026] The telescopic horizontal air pipe 9 can adjust the horizontal position of the slot type air outlet 1 and the slot type air return port 2 according to the specific size of the surgical instrument table; the third air pipe 5 and the second air pipe 6 can be adjusted in height according to the size of the surgical instrument, so as to adjust the vertical position of the slot type air outlet 1 and the slot type air return port 2.

[0027] In particular, in order to adapt to surgical instrument tables of different heights and ensure the consistency of the height of the air supply and return ports, while eliminating the risk of air leakage during adjustment, the air supply pipeline and the air return pipeline both adopt a blind hole positioning type sealing telescopic structure.

[0028] Specifically, the first air pipe 7, the second air pipe 6 and the first air pipe 5 are coaxially sleeved in turn. Among them, the first air pipe 7 is a fixed outer pipe, and its inner diameter is greater than the outer diameter of the second air pipe 6; the second air pipe 6 is an intermediate transition pipe, and its inner diameter is greater than the outer diameter of the first air pipe 5. The upper end of the first air pipe 5 is sealingly connected with the air supply static pressure box 3 or the return air static pressure box 4, forming a telescopic flow channel that gradually shrinks.

[0029] To solve the problem of destroying the air tightness of the traditional telescopic pipe due to the through hole, in the embodiment of the present application, the outer wall of the third air pipe 5 and the second air pipe 6 is fixedly provided with a positioning convex rib or a positioning reinforcing rib along the axial direction. A plurality of positioning blind holes or positioning grooves are arranged on the positioning convex rib or the positioning reinforcing rib along the vertical direction at equal intervals, the depth of the positioning blind holes or the positioning grooves is less than the sum of the thickness of the positioning convex rib and the pipe wall, so that the inner surface of the pipe wall is complete and continuous without any through hole. Correspondingly, at the top end of the first air pipe 7 and the second air pipe 6, an elastic locking member is arranged, which is preferably a spring pin or a ball head plunger. During adjustment, the pin head of the elastic locking member only slides and is clamped in the positioning blind hole of the positioning convex rib, so that the mechanical locking action is completely isolated from the airflow channel in the pipe, and the risk of external pollutants entering the air pipe or clean air leakage through the positioning hole is fundamentally eliminated. In specific operation, medical staff can accurately determine the telescopic gear by the tactile feedback and sound feedback when the elastic locking member is clamped into the positioning blind hole, so as to ensure that the left and right air pipes are strictly horizontally aligned.

[0030] Further, to ensure the air tightness of the telescopic fitting surface, the outer wall of the lower end of the third air pipe 5 and the second air pipe 6 is provided with an annular sealing groove, and an elastic sealing ring is embedded in the groove. The outer diameter of the elastic sealing ring is slightly larger than the inner diameter of the outer pipe, and it always maintains an interference fit state during the lifting adjustment process. This sealing structure not only blocks the leakage path of the positive pressure air supply or the negative pressure return air in the interlayer gap, but also plays a damping and buffering role, preventing the air pipe from accidentally falling during adjustment, and improving the operation feeling and safety. Preferably, the elastic sealing ring is a silicone O-ring or Y-shaped lip seal ring coated with a low friction coefficient coating.

[0031] Specifically, the environment sensing module 21 includes a particulate matter sensor, a volatile organic compound sensor, and a human body infrared sensing sensor.

[0032] As shown in Figure 2 The ultraviolet germicidal lamp tube 13, the polished aluminum film 14, the photocatalytic filter screen 15, the fan 16, the coarse filter screen 17, the HEPA filter screen 18, the activated carbon filter screen 19, and the sound attenuation static pressure tank 20 are arranged in the air treatment device 12 in sequence along the airflow direction. The air in the operating room enters the air treatment device 12, is filtered, purified and sterilized by multiple layers, and is then sent out.

[0033] Further, the ultraviolet germicidal lamp 13 in the air treatment device 12 is surrounded by the polished aluminum film 14, which can reflect the ultraviolet light multiple times to effectively sterilize the air. The photocatalytic filter screen 15 generates hydroxyl radicals (-OH) and active oxygen (-O) by exciting the photocatalyst with ultraviolet light, which can decompose harmful gases such as formaldehyde and benzene into CO2 and H2O, and kill bacteria and viruses. The sound attenuation static pressure tank 20 is arranged at the outlet of the air treatment device 12, and the inner surface is provided with sound absorbing material, which effectively reduces the noise generated by the fan and makes the air flow in the pipeline more stable and uniform.

[0034] Specifically, the fan 16, preferably an EC fan, has variable frequency speed regulation and remote control functions, and is low noise.

[0035] As shown in Figure 3 and Figure 4 , in actual use, medical staff places different types of sterile instrument packages in the center of the instrument table according to the needs of the operation form, and fixes the device to the lower surface of the surgical instrument table through angle steel and other fixing devices. If necessary, rubber damping sheets can be added to isolate the vibration of the ventilation device. Medical staff adjusts the specific positions of the slot-type air supply outlet 1 and the slot-type air return outlet 2 by adjusting the telescopic horizontal air pipe 9, the third air pipe 5 and the second air pipe 6 according to the size of the instrument table and surgical instruments, and then starts the device. After the device is running, a stable and directional clean air flow protection layer is formed in the area above the surgical instrument table, effectively reducing the pollution risk of particulate matter, microorganisms and other pollutants in the air to the sterile instruments, and improving the level of infection prevention and control during the operation.

[0036] As shown in Figure 5 , the control module 22 serves as the central processing unit and analyzes the sensor data in the environmental perception module 21 in real time. When the particulate matter concentration sensor and the volatile organic compound sensor exceed the preset first threshold value or the values rise sharply, the control module 22 sends instructions to the fan 16 to switch from the basic mode to the high-speed operation mode, strengthening the airflow barrier until the pollutant concentration returns to the threshold range; when the human infrared induction sensor senses that there are frequent movements of medical staff around the instrument table, the control module 22 controls the running speed of the fan 16 to stabilize the air curtain. All sensor data, fan gear changes, and mode switching time nodes can be recorded in the memory of the control module 22 and relevant report files can be exported through the USB interface. The control panel 23 is a small touch screen that can display sensor values, system state parameters, and other parameters in real time, and allows medical staff to manually switch the device operation mode or set parameters. In particular, when the volatile organic compound sensor value exceeds the threshold or rises sharply, the control module 22 will not only adjust the running speed of the fan 16, but also control the power of the ultraviolet germicidal lamp 13 to enhance the activity of the photocatalyst filter screen 15.

Claims

1. A ventilation protection device for preventing exposure and contamination of sterile instruments during surgery, characterized in that, The device includes an air handling unit (12) fixed to the lower surface of the surgical instrument table, an air supply plenum (3) connected to the air outlet of the air handling unit via an air supply duct, an air supply outlet (1) located on the air supply plenum and used to supply air to the upper part of the surgical instrument table, a return air plenum (4) connected to the air inlet of the air handling unit via a return air duct, and a return air outlet (2) located on the return air plenum and opposite to the air supply outlet. The air supply duct and the return air duct each include a flexible joint (10), a retractable horizontal duct (9), an elbow (8), and a retractable vertical duct connected in sequence.

2. The ventilation protection device according to claim 1, characterized in that: The vertical duct includes a first duct (7), a second duct (6), and a third duct (5) that are coaxially connected from top to bottom. The inner diameters of the first duct, the second duct, and the third duct decrease sequentially. The top inner surfaces of the first duct and the second duct are provided with elastic locking elements. The bottom outer surfaces of the second duct and the third duct are provided with positioning blind holes at equal intervals. The length of the vertical duct is adjusted by the elastic locking elements sliding and engaging within the positioning blind holes.

3. The ventilation protection device according to claim 2, characterized in that: The elastic locking element is a spring pin or a ball-head plunger.

4. The ventilation protection device according to claim 2, characterized in that: The bottom outer surface of the second and third air ducts is provided with positioning reinforcing ribs, and the positioning blind holes are equally spaced on the positioning reinforcing ribs.

5. The ventilation protection device according to claim 1, characterized in that: The air handling unit (12) is arranged in sequence along the air flow direction as follows: an ultraviolet germicidal lamp tube (13) with polished aluminum film (14) around its perimeter, a photocatalytic filter (15), a fan (16), a coarse filter (17), a HEPA filter (18), an activated carbon filter (19), and a silencer static pressure box (20).

6. The ventilation protection device according to claim 5, characterized in that: The inner surface of the silencing static pressure box is provided with sound-absorbing material.

7. The ventilation protection device according to claim 5, characterized in that: It also includes an environmental sensing module (21), a control module (22), and a control panel (23). The control panel is used for displaying status parameters and human-machine interaction control. The control module adjusts the fan speed and the power of the ultraviolet germicidal lamp tube according to the monitoring data of the environmental sensing module. The environmental sensing module includes a particulate matter sensor, a volatile organic compound sensor, and a human infrared sensor.

8. The ventilation protection device according to claim 7, characterized in that: The status parameters include particulate matter concentration, volatile organic compound concentration, wind speed and rotational speed, and power supply status.

9. The ventilation protection device according to claim 7, characterized in that: The human-machine interaction control includes switching between automatic and manual modes, adjusting the fan speed, switching on and off the ultraviolet germicidal lamp, setting alarm thresholds, setting language, setting volume, and exporting operation reports.

10. The ventilation protection device according to claim 1, characterized in that: Both the supply air vent and the return air vent are slotted air vents.

Images