@article{VermaFuehringDakroubHanetal.2022,
  author    = {Verma-Fuehring, R. and Dakroub, M. and Han, H. and Hillenkamp, J. and Loewen, N. A.},
  title     = {Trabeculopuncture as a predictive test of distal outflow resistance in canal-based surgery},
  series = {Scientific Reports},
  volume    = {12},
  journal   = {Scientific Reports},
  doi       = {10.1038/s41598-022-13990-9},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-299740},
  year      = {2022},
  abstract  = {We investigated whether trabeculopuncture (TP) could detect distal outflow resistance to predict the outcome of canal-based glaucoma surgery such as ab interno trabeculectomy (AIT). These procedures have a high utilization in open angle glaucoma, but fail in eyes with an unidentified distal outflow resistance. We assigned 81 porcine eyes to two groups: trial (n = 42) and control (n = 39). At 24 h, four YAG-laser trabeculopunctures were placed nasally, followed by a 180° AIT at the same site at 48 h. The proportion of TP responders between both AIT groups was compared. Histology and outflow canalograms were determined. Both post-TP and post-AIT IOPs were lower than baseline IOP (p = 0.015 and p < 0.01, respectively). The success rates of TP and AIT were 69\% and 85.7\%, respectively. Sensitivity and specificity values of TP as predictive test for AIT success were 77.7\% and 83.3\%, respectively. The positive and negative predictive values were 96.6\% and 38.5\%, respectively. We conclude that a 10\% reduction in IOP after TP can be used as a predictor for the success (> 20\% IOP decrease) of 180° AIT in porcine eyes.},
  language  = {en}
}