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The RVP was measured at baseline and at four different levels of AirP (10, 20, 30, and 40\u00a0mmHg) using the new IOPstim method: a half balloon of 8\u00a0mm diameter is inflated laterally to the cornea under observation of the central retinal vein. As soon as the vein pulsates at a certain AirP level, the IOP is measured with a commercially available tonometer, which then corresponds to the RVP.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Spontaneous venous pulsation was observed in all study participants. The mean RVP values at baseline and at the AirP levels of 10, 20, 30, and 40 mmHg were 17.6\u2009\u00b1\u20092.8 mmHg; 20.1\u2009\u00b1\u20093.0 mmHg; 22.1\u2009\u00b1\u20093.5 mmHg; 24.3\u2009\u00b1\u20093.7 mmHg, and 26.6\u2009\u00b1\u20094.2 mmHg, respectively. The mean RVP values of each AirP level were statistically significantly different from each other in pairwise comparison. In a linear mixed model, the effect of AirP on RVP was highly significant (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). In the model, a 10-mmHg increase in AirP resulted in a linear increase in RVP of 2.2 mmHg.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>An increase in AirP was accompanied by a linear increase in RVP. The influence of AirP on RVP, and thus on retinal perfusion pressure during the Valsalva maneuver, is less than was assumed based on previous studies in which contact lens dynamometry was used.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00417-024-06483-0","type":"journal-article","created":{"date-parts":[[2024,4,9]],"date-time":"2024-04-09T07:02:14Z","timestamp":1712646134000},"page":"2971-2976","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The retinal venous pressure at different levels of airway pressure measured with a new method"],"prefix":"10.1007","volume":"262","author":[{"given":"Johanna L.","family":"Baumg\u00e4rtner","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Richard","family":"Stodtmeister","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ren\u00e9","family":"Mauer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lutz E.","family":"Pillunat","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4400-6004","authenticated-orcid":false,"given":"Karin R.","family":"Pillunat","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,4,9]]},"reference":[{"key":"6483_CR1","doi-asserted-by":"publisher","first-page":"1374","DOI":"10.1136\/BJOPHTHALMOL-2014-305126","volume":"98","author":"KR Pillunat","year":"2014","unstructured":"Pillunat KR, Ventzke S, Spoerl E, Furashova O, Stodtmeister R, Pillunat LE (2014) Central retinal venous pulsation pressure in different stages of primary open-angle glaucoma. 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