A sterile sputum trap is inexpensive and readily available. It can be used to collect specimens other than sputum. It may require some planning in advance and require some experience to maintain specimen quality.
Fluids that may be collected:
(1) GI fluid aspirate
(2) chest fluid
(3) peritoneal fluid
(4) abscess cavity
(5) washing from paranasal sinuses
Issues:
(1) having a suitable site for placement (readily undone, diameters compatible with sputum trap tubing)
(2) method of obtaining negative pressure and the means of maintaining negative pressure if necessary (usually clamps on flrexible tubing or valves)
(3) steps needed to maintain sterility
(4) volume required in mL (usually a suction trap is appropriate for less than 40 mL)
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