Related Experiment Video
Updated: Apr 6, 2026

Induction and Assessment of Levodopa-induced Dyskinesias in a Rat Model of Parkinson's Disease
Published on: October 14, 2021
Transcutaneous port for levodopa/carbidopa intestinal gel administration in Parkinson's disease
T van Laar1, D Nyholm2, R Nyman3
1Department of Neurology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Objective:
To evaluate the safety and tolerability of the T-Port(®) for intestinal infusion of levodopa/carbidopa gel in patients with advanced Parkinson's disease (PD).
Methods:
This prospective study was carried out in 24 patients with PD (15 males, mean age 61.8 years, mean duration PD 18.7 years). All adverse device effects were evaluated at 2 weeks, 3 months and 6 months and until explantation or death.
Results:
Post-operative complications were similar to endoscopic gastrojejunostomy placement (four peritoneal irritation, one pocket pain). Eight patients with prior experience with the endoscopic gastrojejunostomy preferred the T-Port. The total device experience was 83.6 years, and the average survival time was 3.6 (range 1.1-5.2) years. Six T-Ports were still in use, and two patients had died due to non-device-related reasons. Sixteen T-Ports had been explanted due to 15 stoma reactions (14 inflammations and one infection) and one tilting of the T-Port. The T-Ports were replaced with endoscopic gastrojejunostomy system as replacements with T-Ports were not part of the study. Only two device malfunctions occurred (one catheter breakage at 3 year post-implant and one T-Port leakage of levodopa/carbidopa gel). No tube kinking, dislocation or blockage occurred. The number of adverse device effects proved to be significantly lower as compared to the endoscopic gastrojejunostomy literature data.
Conclusions:
The T-Port is safe and well tolerated, and the low number of tube problems is a potential advantage compared with the endoscopic gastrojejunostomy system. Proper cleaning and local treatment of the stoma site around the T-Port are essential to prolong its longevity.
Related Concept Videos
Parkinson's Disease: Treatment
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of...
Transdermal Drug Delivery Systems
Drug Delivery: Parenteral Route
There are three primary parenteral routes: intravenous (IV), intramuscular (IM), and subcutaneous (SC). The IV route introduces the drug directly into the bloodstream, ensuring immediate action. The IM route...
Drug Delivery: Enteral Route
Parkinson's Disease: Overview
Drug Delivery: Miscellaneous Routes
Oral inhalation and nasal sprays swiftly transfer drugs across the respiratory epithelium's mucosal layer. Inhaled glucocorticoids and bronchodilators directly target lung conditions such as asthma, while fluticasone nasal spray mitigates allergic rhinitis.
Transdermal patches transport drugs...

