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Jelly is a fruit-flavoured gelatin dessert that exists as a viscoelastic semi-solid mass when refrigerated but melts back into its liquid form once ingested; therefore, it is not obvious to which category it should belong. We used ultrasound to investigate gastric emptying following ingestion of jelly in a pilot study of 10 fasted healthy adult volunteers. First, a baseline scan was performed to confirm their estimated gastric volume was less than 2.3\u2009ml\/kg (the 95th centile for a fasted population). Subjects then ate 400\u2009g of jelly and underwent repeated scans every 10 minutes until their estimated gastric volume had returned to baseline. Median (interquartile range) estimated gastric volume was 0 (0\u20130.6) ml\/kg at baseline, peaked at 3.1 (2.7\u20134.3) ml\/kg 10 minutes post-ingestion and had decreased to 0 (0\u20130.9) ml\/kg by two hours. It took a median (interquartile range) of 70 (47.5\u201380.0) minutes for estimated gastric volume to fall below 2.3\u2009ml\/kg, and 110 (110\u2013130) minutes before it had returned to baseline. These data suggest that, for serving sizes up to 400\u2009grams of jelly there might be no justification for mandating a six-hour fast prior to anaesthesia.<\/jats:p>","DOI":"10.1177\/0310057x261442555","type":"journal-article","created":{"date-parts":[[2026,6,15]],"date-time":"2026-06-15T06:04:52Z","timestamp":1781503492000},"page":"469-475","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Is jelly a solid or a clear liquid? A pilot study using ultrasound to assess the gastric emptying of fruit-flavoured gelatin dessert"],"prefix":"10.1177","volume":"54","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3467-5041","authenticated-orcid":false,"given":"Anthony D","family":"Hade","sequence":"first","affiliation":[{"name":"Department of Anaesthesia and Perioperative Medicine, Royal Brisbane and Women\u2019s Hospital, Herston, QLD, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kate","family":"Morgan","sequence":"additional","affiliation":[{"name":"Department of Nutrition and Dietetics, Royal Brisbane and Women\u2019s Hospital, Herston, QLD, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stacey","family":"Llewellyn","sequence":"additional","affiliation":[{"name":"QIMR Berghofer Medical Research Institute, Herston, QLD, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5958-5857","authenticated-orcid":false,"given":"Fraser JA","family":"Morton","sequence":"additional","affiliation":[{"name":"Department of Anaesthesia and Perioperative Medicine, Royal Brisbane and Women\u2019s Hospital, Herston, QLD, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,6,14]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1093\/bja\/aer058"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1093\/bja\/aeh234"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1097\/EJA.0b013e3283495ba1"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1097\/ALN.0000000000001452"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11894-002-0083-2"},{"key":"e_1_3_3_7_2","unstructured":"Australian and New Zealand College of Anaesthetists. 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