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Case Reports  |   July 2003
Psoas Abscess Complicating Femoral Nerve Block Catheter
Author Affiliations & Notes
  • Frédéric Adam, M.D.
    *
  • Souhail Jaziri, M.D.
  • Marcel Chauvin, M.D.
  • *Assistant Professor, †Resident, ‡ Professor and Chair, Department of Anesthesiology, Hôpital AmbroiseParé.
  • Received from Hôpital AmbroiseParé, Boulogne-Billancourt, France.
Article Information
Case Reports
Case Reports   |   July 2003
Psoas Abscess Complicating Femoral Nerve Block Catheter
Anesthesiology 7 2003, Vol.99, 230-231. doi:
Anesthesiology 7 2003, Vol.99, 230-231. doi:
CONTINUOUS three-in-one blockade is widely used for providing postoperative analgesia after knee surgery. Distinct serious complications have been described after femoral nerve block: neurologic injury as well as hematoma compressive and epidural anesthesia. 1–2 We report a case of psoas abscess complicating a continuous three-in-one blockade.
Case Report
A 35-yr-old woman, American Society of Anesthesiologists physical status 1, was admitted for a knee arthroscopic arthrolysis. Before induction of anesthesia, a femoral catheter was placed aseptically. The anesthetist wore a cap, a face mask, and sterile gloves. The skin was prepared with 1% polyvidone iodine and was draped with sterile drape. Continuous three-in-one blockade was performed following Winnie et al  . landmarks. 3 An insulated short-beveled needle with an 18-gauge cannula (Mini Set®; Pajunk, Geisingen, Germany) was inserted cranially until muscle contraction in the quadriceps was observed. The needle was removed, and a 20-gauge multiorifice catheter was then easily placed. After a negative aspiration test, 20 ml of ropivacaine, 0.75%, was injected. A micropore flat bacterial filter 0.2 μm (Portex LTD, Hythe, Kent, England) was connected to the hub of the femoral catheter, which was secured with a transparent adhesive dressing.
Postoperative analgesia was provided by a continuous infusion of ropivacaine, 0.2%, at 8 ml/h on the femoral catheter. Four days after surgery, the femoral catheter was removed. The nurse noted no evidence of superficial infection at the catheter insertion site. On the next day, the patient reported pain in her left lower quadrant associated with fever and an elevated leukocyte count. Four days after the catheter was removed, the patient remained febrile and the abdominal pain persisted. A pelvic echograph showed a psoas mass. Abscess formation was treated with computed tomographic scan-guided percutaneous puncture (fig. 1). The copious amounts of pus subsequently indicated Staphylococcus aureus  . The infection was treated with a 1-month course of antibiotics, after which a second computed tomographic scan showed no recurrence of the psoas mass.
Fig. 1. Treatment of psoas abscess by percutaneous drainage under computed tomography guidance. The abscess is circled in white (A  ). The percutaneous puncture point is identified by B  .
Fig. 1. Treatment of psoas abscess by percutaneous drainage under computed tomography guidance. The abscess is circled in white (A 
	). The percutaneous puncture point is identified by B 
	.
Fig. 1. Treatment of psoas abscess by percutaneous drainage under computed tomography guidance. The abscess is circled in white (A  ). The percutaneous puncture point is identified by B  .
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Discussion
The main infectious complication reported after a regional nerve block technique is the uncommon but potentially deleterious epidural abscess. 4 Recently, it was shown that after 48 h, 57% of femoral nerve catheters had positive bacterial colonization; however, no patient developed an abscess. 5 In our patient, a culture was not performed on the catheter because on the day of removal the patient reported no discomfort. Yet S. aureus  found with computed tomographic scan puncture is the most common causative organism cultured from epidural abscess after epidural anesthesia. 6 Pyogenic psoas abscesses are most often associated with vertebral osteomyelitis or Crohn disease. 7 In our patient, the abscess probably resulted from catheter colonization at a superficial site and subsequently wicked the infection from the skin to the psoas space.
This case illustrates the importance of the golden aseptic rules during puncture and catheter insertion for regional anesthesia. In any patient who shows an infectious syndrome and has or has had a continuous nerve block, the possibility of a complication of regional anesthesia should be considered until proof of the contrary, even if the patient had no evidence of superficial infection at the catheter insertion site.
References
Singelyn FJ, Contreras V, Gouverneur JM: Epidural anesthesia complicating continuous 3-in-1 lumbar plexus blockade. A nesthesiology 1995; 83: 217–20Singelyn, FJ Contreras, V Gouverneur, JM
Auroy Y, Benhamou D, Bargues L, Ecoffey C, Falissard B, Mercier F, Bouaziz H, Samii K: Major complications of regional anesthesia in France: The SOS Regional Anesthesia Hotline Service. A nesthesiology 2002; 97: 1274–80Auroy, Y Benhamou, D Bargues, L Ecoffey, C Falissard, B Mercier, F Bouaziz, H Samii, K
Winnie AP, Ramamurthy S, Durrani Z: The inguinal paravascular technic of lumbar plexus anesthesia: The “3-in-1 block.” Anesth Analg 1973; 52: 989–96Winnie, AP Ramamurthy, S Durrani, Z
Phillips JM, Stedeford JC, Hartsilver E, Roberts C: Epidural abscess complicating insertion of epidural catheters. Br J Anaesth 2002; 89: 778–82Phillips, JM Stedeford, JC Hartsilver, E Roberts, C
Cuvillon P, Ripart J, Lalourcey L, Veyrat E, L'Hermite J, Boisson C, Thouabtia E, Eledjam JJ: The continuous femoral nerve block catheter for postoperative analgesia: Bacterial colonization, infectious rate and adverse effects. Anesth Analg 2001; 93: 1045–49Cuvillon, P Ripart, J Lalourcey, L Veyrat, E L'Hermite, J Boisson, C Thouabtia, E Eledjam, JJ
Kindler CH, Seeberger MD, Staender SE: Epidural abscess complicating epidural anesthesia and analgesia: An analysis of the literature. Acta Anaesthesiol Scand 1998; 42: 614–20Kindler, CH Seeberger, MD Staender, SE
Kao PF, Tsui KH, Leu HS, Tsai MF, Tzen KY: Diagnosis and treatment of pyogenic psoas abscess in diabetic patients: Usefulness of computed tomography and gallium-67 scanning. Urology 2001; 57: 246–51Kao, PF Tsui, KH Leu, HS Tsai, MF Tzen, KY
Fig. 1. Treatment of psoas abscess by percutaneous drainage under computed tomography guidance. The abscess is circled in white (A  ). The percutaneous puncture point is identified by B  .
Fig. 1. Treatment of psoas abscess by percutaneous drainage under computed tomography guidance. The abscess is circled in white (A 
	). The percutaneous puncture point is identified by B 
	.
Fig. 1. Treatment of psoas abscess by percutaneous drainage under computed tomography guidance. The abscess is circled in white (A  ). The percutaneous puncture point is identified by B  .
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