title: [Contrast media pressure injection using a portal catheter system--results of an in vitro study].
abstract: OBJECTIVE
  Are implanted central venous port catheters suitable for contrast media pressure (power) injection in computed tomography?
  
  
  METHODS
  In an in vitro study 100 ml of contrast medium (Ultravist 370, Schering, Berlin, Deutschland) was injected through 20 different port catheter systems using a power injector (Stellant, Medrad, Inianola, USA) with a pressure limit of 325 PSI. The injection rate was increased from 2 ml/s to 10 ml/s in increments of 2 ml/s. The maximum injection pressure and maximum injection rate were assessed.
  
  
  RESULTS
  An injection rate of 2 ml/s was possible in all catheter systems. Injection rates of 4 ml/s in 18 systems, 6 ml/s in 13 systems and 8 ml/s in 6 systems were achieved. With a given pressure limit of 325 PSI an injection rate of 10 ml/s was not possible in any of the port catheter systems. There were no catheter ruptures, catheter disconnections or contrast extravasations noted.
  
  
  CONCLUSIONS
  Power injection of contrast media with a pressure limit of 325 PSI seems to be tolerated by port catheter systems. Most of the evaluated port systems allow flow rates suitable for multislice computed tomography requiring rapid contrast injection.
authors.affiliation: Klinik für Strahlenheilkunde, Charité, Universitätsmedizin Berlin, Campus Buch, Berlin. bernhard.gebauer@charite.de
authors.forename: B
authors.initials: B
authors.lastname: Gebauer
authors.forename: U K-M
authors.initials: UK
authors.lastname: Teichgräber
authors.forename: T
authors.initials: T
authors.lastname: Hothan
authors.forename: R
authors.initials: R
authors.lastname: Felix
authors.forename: H-J
authors.initials: HJ
authors.lastname: Wagner
mesh_terms: D002405:Catheterization, Central Venous / Q000295:instrumentation* / Q000379:methods; D003287:Contrast Media / Q000008:administration & dosage*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D066298:In Vitro Techniques; D007275:Injections, Intravenous / Q000295:instrumentation* / Q000379:methods; D007472:Iohexol / Q000008:administration & dosage / Q000031:analogs & derivatives*; D011312:Pressure; D014057:Tomography, X-Ray Computed / Q000295:instrumentation* / Q000379:methods*
chemical_list: D003287:Contrast Media; D007472:Iohexol; C038192:iopromide