Skeet, MurielFear, David2018-09-092018-09-091995http://hdl.handle.net/20.500.12091/242There are several types of suction machine. According to the design, different flow rates and different pressures - high, low or dual - can be attained. It is important to read and understand the relevant documentation for the machine you are using. For example some machines are designed to function for only 1 to 2 hours at a time and will be seriously damaged if they are run continuously over a longer period. These are labelled ‘Int’, which means they are for intermittent use only. Each model will have a pump which may be driven either electrically or by hand. This, under carefully controlled conditions, draws fluid from the patient, through a flexible tube, into a glass reservoir jar (Figure 36). To prevent fluids passing back to the pump, a float valve (F) rises until a predetermined fluid level is reached. It then closes off the suction.en-USSuction MachineUMDNS: 10208Book chapter