BOWA SHE SHA
Smoke extraction for a smoke-free operating theatre
Electrosurgery fumes are hazardous
Fumes from surgical operations using HF current, lasers or ultrasonic instruments are hazardous to health, create an odour nuisance, and hamper vision
in the operation area. The SHE SHA smoke evacuation unit from BOWA effectively removes and filters operation fumes and aerosols directly at the source.
Efficient electrosurgery fume extraction
The SHE SHA is easy to use, with flexibility to cover a wide range of surgical procedures. The low noise level and the long life of the four-stage filter (activation time
up to 35 hours) set a new standard.
The filter is automatically detected and the remaining lifetime is indicated. The suction power can be set to three different levels. Activation is fully automatic via
a universal sensor that can be connected to every electrosurgery device to limit activation to when fumes are actually present.
Health hazard from surgical fumes
Along with obvious physical impairments to operating theatre staff from surgical fumes, such as odour nuisance and limited vision in the operation area, the health risk from surgical fumes should not be ignored.
Surgical fumes consist of a complex mixture of biological, cellular, particulate, gaseous and vapour components. The main component is water vapour, however, the other components – including harmful particles and viruses – are hazardous.
The size of the particles in the fumes can vary greatly, from less than 10 nanometres to more than 200 micrometres. For example, the average particle size with electrocautery instruments is less than 0.1 micrometre, and with ultrasonic scalpels it is about 0.35 to 0.65 micrometre. This means that a very large volume of these small particles can be inhaled and deposited in the alveoli in the lungs.
Possible health risks from surgical smoke fumes, depending on the dose level:
– Eye irritation
– Streaming eyes
– Irritation of the nasopharyngeal cavity
– Acute or chronic inflammation of the respiratory tract (bronchitis, asthma,
– Nausea, vomiting
– Anxiety, discomfort
– Hypoxia, dizziness
– Cardiovascular disorders
– HIV infection
It has been shown that face masks such as are commonly worn in operating theatres do not provide adequate protection against particles and germs.
SHE SHA filter
The only effective protection against surgical fumes is extraction and filtration directly at the source, using a smoke evacuation unit.
Acoustic emission Max. 55 dB(A)
Size (H x W x D) 15 x 28 x 39.5 cm
Flow rate Max. 708 litre / min (with 22 mm tube)
Weight 4.4 kg (5.5 kg with filter)
Filter type Four-stage filtration (prefilter, ULPA, active charcoal, postfilter)
Particle size 0.1–0.2 µm at 99.999 % efficiency
Supply voltage 100–120 V / 220–240 V