Eric M Dvorak1, John R McGuire, Mary Elizabeth S Nelson. 1. Department of Physical Medicine and Rehabilitation, Medical College of Wisconsin, 9200 W. Wisconsin Avenue, Milwaukee, WI 53226, USA. edvorak@mcw.edu
Abstract
OBJECTIVE: A retrospective chart review was undertaken of cases of intrathecal baclofen (ITB) pump/catheter malfunction and the diagnostic tests performed to identify the problem. An internal review was performed to develop a diagnostic flow chart to have a systematic method for identifying ITB pump and catheter complications. DESIGN: Retrospective chart review. SETTING: Tertiary care hospital. PARTICIPANTS: A total of 167 adult patients currently followed in outpatient clinic with intractable spasticity and ITB pump implanted between January 1994 and May 2009. INTERVENTIONS: None. MAIN OUTCOME MEASURES: Catheter malfunction was identified either by anterior/posterior and lateral thoracic/lumbar radiographs, fluoroscopic guided side port access, contrast agent injection followed by CT (fluoro/CT) scan, or indium radionuclide studies. RESULTS: During the study period, 33 patients had 37 catheter revisions. Radiographs were obtained in all cases; fluoro/CT studies in 22, and indium studies in 6. Four cases had both fluoro/CT and indium studies. A total of 13 cases (35.1%) were diagnosed with radiographs; 9 cases (24.3%) were diagnosed by inability to withdraw cerebral spinal fluid from the side port; 13 cases (35.1%) were diagnosed with fluoro/CT studies; and 2 cases (5.4%) were diagnosed with indium studies. Fluoro/CT studies demonstrated subdural catheter location in 7 cases. A total of 2 of 4 cases with both fluoro/CT and indium studies had normal-appearing indium scans and an abnormal fluoro/CT study confirming subdural catheter placement. CONCLUSIONS: On the basis of an internal review of the diagnostic studies used to identify patients with suspected ITB pump/catheter malfunction, a troubleshooting flow chart was developed. Timely identification and correction of potential ITB complications could improve the clinical effectiveness of ITB and may reduce unnecessary health-care costs.
OBJECTIVE: A retrospective chart review was undertaken of cases of intrathecal baclofen (ITB) pump/catheter malfunction and the diagnostic tests performed to identify the problem. An internal review was performed to develop a diagnostic flow chart to have a systematic method for identifying ITB pump and catheter complications. DESIGN: Retrospective chart review. SETTING: Tertiary care hospital. PARTICIPANTS: A total of 167 adult patients currently followed in outpatient clinic with intractable spasticity and ITB pump implanted between January 1994 and May 2009. INTERVENTIONS: None. MAIN OUTCOME MEASURES: Catheter malfunction was identified either by anterior/posterior and lateral thoracic/lumbar radiographs, fluoroscopic guided side port access, contrast agent injection followed by CT (fluoro/CT) scan, or indium radionuclide studies. RESULTS: During the study period, 33 patients had 37 catheter revisions. Radiographs were obtained in all cases; fluoro/CT studies in 22, and indium studies in 6. Four cases had both fluoro/CT and indium studies. A total of 13 cases (35.1%) were diagnosed with radiographs; 9 cases (24.3%) were diagnosed by inability to withdraw cerebral spinal fluid from the side port; 13 cases (35.1%) were diagnosed with fluoro/CT studies; and 2 cases (5.4%) were diagnosed with indium studies. Fluoro/CT studies demonstrated subdural catheter location in 7 cases. A total of 2 of 4 cases with both fluoro/CT and indium studies had normal-appearing indium scans and an abnormal fluoro/CT study confirming subdural catheter placement. CONCLUSIONS: On the basis of an internal review of the diagnostic studies used to identify patients with suspected ITB pump/catheter malfunction, a troubleshooting flow chart was developed. Timely identification and correction of potential ITB complications could improve the clinical effectiveness of ITB and may reduce unnecessary health-care costs.
Authors: Elmar M Delhaas; Daniëlle M E van Assema; Alida C Fröberg; Ben G J C Zwezerijnen; Biswadjiet S Harhangi; Sander P G Frankema; Frank J P M Huygen; Aad van der Lugt Journal: Neuromodulation Date: 2020-09-18