title: The continuous femoral nerve block catheter for postoperative analgesia: bacterial colonization, infectious rate and adverse effects.
abstract: We investigated the incidence of bacterial and vascular or neurological complications resulting from femoral nerve catheters used for postoperative analgesia. Patients requiring continuous femoral blockade were consecutively included. Using surgical aseptic procedure, 211 femoral nerve catheters were placed (short-beveled insulated needle, peripheral nerve stimulator). After 48 h, each catheter was removed and semiquantitative bacteriological cultures were performed on each distal catheter tip. Postoperative analgesia and antibiotics were standardized. All complications during the insertion of the catheters and postoperatively (after 48 h and 6 wk) were noted. Few initial complications with no immediate or delayed complications were noted (20 difficult insertions, 3 impossible injections, 3 ineffective catheters, and 12 vascular punctures). After 48 h, 208 catheters were analyzed; 57% had positive bacterial colonization (with a single organism in 53%). The most frequent organisms were Staphylococcus epidermidis (71%), Enterococcus (10%), and Klebsiella (4%). Neither cellulitis nor abscess occurred. Three transitory bacteremias likely related to the catheter occurred. After 6 wk, no septic complications were noted. One femoral paresthesia, partially recovered 1 yr later, was noted. We conclude that the risk of bacterial complications is small with femoral nerve catheters, although the rate of colonization is frequent.
  
  
  CONCLUSIONS
  In this prospective study, continuous femoral nerve catheters were effective for postoperative analgesia but had a frequent rate of bacterial catheter colonization. We found no serious infections after short-term (2-day) infusion. Side effects were few, but one nerve injury occurred.
authors.affiliation: Department of Anesthesiology and Pain Management, Gaston Doumergue Hospital, University Hospital of Nîmes, Nîmes Cedex, France. philippe.cuvillon@wanadoo.fr
authors.forename: P
authors.initials: P
authors.lastname: Cuvillon
authors.forename: J
authors.initials: J
authors.lastname: Ripart
authors.forename: L
authors.initials: L
authors.lastname: Lalourcey
authors.forename: E
authors.initials: E
authors.lastname: Veyrat
authors.forename: J
authors.initials: J
authors.lastname: L'Hermite
authors.forename: C
authors.initials: C
authors.lastname: Boisson
authors.forename: E
authors.initials: E
authors.lastname: Thouabtia
authors.forename: J J
authors.initials: JJ
authors.lastname: Eledjam
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001424:Bacterial Infections / Q000453:epidemiology / Q000382:microbiology*; D002406:Catheterization, Peripheral; D005260:Female; D005267:Femoral Nerve; D006801:Humans; D008297:Male; D008875:Middle Aged; D009407:Nerve Block / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods*; D010147:Pain Measurement; D010149:Postoperative Pain / Q000188:drug therapy*; D011183:Postoperative Complications / Q000188:drug therapy* / Q000453:epidemiology; D011446:Prospective Studies