drainage

(drin’aj). The systematic withdrawal of fluids and discharges from a wound, sore, or cavity. basal d., withdrawal of the cerebrospinal fluid from the basal subarachnoid space for the relief of intracranial pre ure. capil. d., drainage effected by strands of hair, catgut, spun gla , or other material which acts by capillary attraction. funnel d., drainage by gla funnels inserted into edematous ti ues. through d., drainage effected by pa ing a perforated tube through the cavity, so that irrigation may be effected by injecting fluid into one aperture and letting it escape out of another.