title: [Polyhexamethylbiguanid (PHMB) as preoperative antiseptic for cataract surgery].
abstract: BACKGROUND
  We examined the efficacy and tolerability of Lavasept (polyhexamethylenbiguanid or PHMB)-an iodine-free antiseptic-in comparison to polyvinylpyrolidon iodine and Ringer's solution, as an alternative preoperative antiseptic.
  
  
  METHODS
  In a randomized controlled double-blind trial 3 drops of Lavasept, 1.25%, PVP-iodine or Ringer's solution were applied preoperatively in 29 patients. The number of colony forming units (cfu) grown from conjunctival smears and conjunctival hyperaemia, corneal epitheliopathy and ocular surface pain were assessed preoperatively, intraoperatively and 1 day postoperatively.
  
  
  RESULTS
  Despite intraoperative application of PVP-iodine, 40% of patients receiving Ringers solution still presented with more than 5 colony forming units (cfu) at the end of the procedure, while all patients that had additional preoperative Lavasept or PVP-iodine achieved relative sterility with less than 5 cfu (p < 0.05). While the effect of Lavasept lasted until the next day, conjunctival microbial colonisation recurred in eyes treated with PVP-iodine. As expected conjunctival hyperaemia and corneal epitheliopathy increased significantly postoperatively but no differences were observed between the 3 solutions tested.
  
  
  CONCLUSIONS
  The preoperative application of Lavasept reduces the conjunctival flora safely and effectively. The microbicidal efficacy is equal to PVP-iodine, but potentially longer lasting. No signs of local or systemic intolerability were observed. Lavasept may be used as a potential alternative preoperative antiseptic and is suitable for iodine-intolerant patients.
authors.affiliation: Klinik für Augenheilkunde des Universitätsklinikums Schleswig-Holstein Lübeck, Campus Lübeck.
authors.forename: F
authors.initials: F
authors.lastname: Hansmann
authors.forename: A
authors.initials: A
authors.lastname: Kramer
authors.forename: H
authors.initials: H
authors.lastname: Ohgke
authors.forename: H
authors.initials: H
authors.lastname: Strobel
authors.forename: M
authors.initials: M
authors.lastname: Müller
authors.forename: G
authors.initials: G
authors.lastname: Geerling
mesh_terms: D000328:Adult; D001645:Biguanides / Q000009:adverse effects / Q000627:therapeutic use*; D002387:Cataract Extraction; D003114:Colony-Forming Units Assay; D003228:Conjunctiva / Q000382:microbiology; D004202:Disinfectants / Q000627:therapeutic use*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007552:Isotonic Solutions / Q000008:administration & dosage / Q000009:adverse effects; D008297:Male; D011206:Povidone-Iodine / Q000009:adverse effects / Q000627:therapeutic use; D011300:Preoperative Care / Q000379:methods*; D000077325:Ringer's Lactate; D016896:Treatment Outcome
chemical_list: D001645:Biguanides; D004202:Disinfectants; D007552:Isotonic Solutions; D000077325:Ringer's Lactate; C031233:polihexanide; D011206:Povidone-Iodine