Laminar flow operating room smallpox

Laminar flow operating room smallpox

Clean operating room laminar smallpox to strict for indoor air filtration, removal of planktonic bacteria in the air, and the air distribution of science, make the patient and medical staff of bacteria with airflow away, not return incision, to avoid the infection from the air.So strict air filter, reasonable airflow organization, is the core operating room air purification system of the technology.

Laminar flow operating room smallpox in the air purification process.Fresh air into the return air section, mixed with return air, again into effect in the early period, early efficient filter filter to a diameter of 10 um large particles of dust, into the heat exchanger and humidification, which can adjust the temperature, humidity, and then into the fan section pressure, through the efficient filter, dust filter to l - 10 um, enter the silencer, the noise dropped below 58 db, sent to the operating room of efficient plenum, the high efficiency filter dust filter to 0.31 um um - 1, the high efficiency air supply outlet, the mesa clean air sent to the operating room.At the beginning of operating room return air mouth installation has effectively filter, return air piping is also equipped with muffler.The operating room to install more than pressure valve, in order to maintain indoor positive pressure value of the constant.Exhaust fan is used to quickly eliminate peculiar smell and accelerate the fresh air.

Clean operating room smallpox laminar flow organization forms: clean operating room in coarse, medium and high level 3 filters can be *, for indoor air is clean, decide the level of the purity of the operating room is a form of airflow.Different forms of air flow to eliminate the operating room like bacteria quantity effect is not of itself, cause the operation clean level is different also.The basic principle of the clean operating room air flow organization is to minimize eddy current, make the shoot people clean air flow through the shortest flow operation area, hope the direction of the airflow and dust gravity sedimentation in the same direction, and makes the backflow effectively will indoor airflow dust emitted.In clean technology, the airflow organization is divided into laminar flow and turbulence (turbulent) 2 types.Laminar flow according to the particle in the air flowing speed of uniform cross section in the parallel to the streamline, turbulence said particles in the air is the uneven flow at the speed of non-uniform flow.

According to the airflow organization form,
Clean operating room is usually divided into vertical laminar flow operating room, horizontal laminar flow operating room, turbulence in the operating room and adjustable cleanliness in the operating room,
1, vertical laminar flow operating room: smallpox smallpox vertical laminar flow operating room is hepa filter cloth over the table, the lower part of the side wall cloth inlet.Parallel vertical, the upper portion of the airflow into laminar flow state, the lower is the return air mouth tilt, laminar flow has been destroyed.In the table of the epitaxial areas around the table and form clean laminar flow area, local area for high cleanliness.
To ensure operation area cleanliness, efficient air supply outlet must be sufficient, the area of class I in the operating room should be greater than 6.2 m2, on the height of 0.8 m air supply velocity should not be less than 0.25 m/s.。Shadowless lamp is installed in the middle of the air supply outlet, in order to reduce fan impact air flow, with a small shield skeleton type shadowless lamp, big back shell shadowless lamp effect on airflow, unfavorable use.
2、Smallpox smallpox, horizontal laminar flow operating room 2: horizontal laminar flow operating room is the feature of horizontal air supply, air supply metope hepa filter cloth, return air in air distribution across the wall, metope decorate a coarse filter, filter and flow effect, prevent the indoor floating fibers and duct, dust pollution protection level after filter, the patient's feet to the air supply outlet, the anesthesiologist on one side of the head and anaesthesia equipment squarely in the direction of the wind, in order to prevent the anesthetic gas contamination.
Horizontal laminar flow operating room of high efficiency filter, static pressure box, air supply outlet installed in the operating room on the side, do not take up the operating room height, so the height on the low side of the operating room can use horizontal laminar flow way.It occupies large area, in order to overcome the gravity settling of dust, air supply velocity is higher than the vertical laminar flow wind speed, not less than 0.3 m/s, namely air output to increase.
Choose way of laminar flow, associated with the structure of the operating room.。Experiments show that the vertical laminar flow bacteria disappear fast, dust concentration is low, but the vertical incision and airflow direction, and the cutter head doctor in incision on the wind.And horizontal laminar incision parallel to air flow, so the horizontal laminar incision of pollution than vertical laminar flow.Foreign horizontal laminar flow operating room more than vertical laminar flow operating room, covers an area of the current domestic in order to save the operating room, vertical laminar flow operating room use.
3、 turbulence clean operating room: the filtered clean air from the top or side of several supply air into the mouth, clean air rapidly spreading around, blended with indoor air, and the indoor air inlet ruled out, because of the clean air to dilute the air dust concentration, to meet the requirements of the corresponding clean level. Cleanroom airflow turbulence, decorate should be the shortest distance to make clean air wafted to the operation platform, thereby reducing the likelihood of clean system polluted, the cleanliness level of up to 1000-100000, this is mainly determined by the air output, the ventilation rate, ventilation rate reaches 40 times per hour, the insurable the 1000 level of cleanliness cleanliness, Ⅱ clean operating room, the standard clean operating room.Send certain, return than a certain amount of dust in the operating room, operating room spotlessness (concentrations (low), high cycles.
4、 adjustable cleanliness in the operating room: the above three kinds of operating room air output is constant, the air flow is constant in form, operating room air cleanliness is a constant, in using the management is not flexible, comprehensive utilization is not convenient to the operating room, is unfavorable to save energy.。In the big surgery, department of management, in order to improve the utilization rate of the operating room, most of the operating room arrangement types of surgery will often change, their demand for cleanliness is also not consistent.
If eye surgery wind speed is low, general surgery, bone surgery wind speed can be higher.Medical staff and patients feel each have about wind speed difference, in order to choose the most comfortable wind speed, so often ask for wind speed adaptive adjustment.Wind speed change, send air volume change, airflow form change, indoor air cleanliness is also changing.In order to adapt to the adjustment of the wind speed, the purification of the clean operating room should adopt independent air conditioning unit, blower should adopt frequency control of motor speed control system.
Efficient air diffuser and return air mouth according to level 100 cleanliness requirements of the operating room layout design.Fan type and duct size can be the lower limit of design according to the requirements of grade 100.Fan runs at high speed, the indoor cleanliness level work under the state in 100, when low speed cleanliness level down to 10000 or less work.The operating room for the construction of the investment can be below the standard of cleanliness level 100 operating room, strict definition of cleanliness is difficult to adapt to the needs of the changes in clinical practice, according to the actual need, adjust, accepted and approved by the medical staff.This is the development of frequency conversion adjustment technology and mature operating room design and function change.