{
  "abstract": "Please confirm that an ethics committee approval has been applied for or granted: Yes: I’m uploading the Ethics Committee Approval as a PDF file with this abstract submissionApplication for ESRA Abstract PrizesBackground and Aims Eye surgery is increasingly taking place without anaesthesiologists. Providing safe and cost-effective analgesia, avoiding the risks of traditional sharp-needle blocks is important. This study explores a safe tangential sharp-needle approach for STB, screening for complications and inadequate analgesia through VAS/PROM screeningMethods In 2023, a representative demographic cohort (>18 y) of consenting ASA 1–2 patients (n=907) (median-age 75.5 y) scheduled for anterior chamber eye surgery (refractive, glaucoma and iris surgery) received STB-injection of 1–1.5 ml ropivacaine 2% containing 50 μg dexmedetomidine. STB injected at 8 mm lateral limbus, lateral M rectus inf. insertion (see figure 1)Results - STB-onset averaged 4 min, -STB-duration > 3 h, - small sub-conjunctival hemorrhage 42%, - conjunctival chemosis 19.4% -18% of the patients demanded additional analgesia iv (2 γ/kg fentanyl + 1 mg midazolam), reporting VAS scores >/= 3 during surgeryAbstract P264 Figure 1Schematic depiction of short sharp-needle STB injected lateral to musc-rect. inf., remainiung parallel to anetrior scleral plane-compare to photographic depictionConclusions Anterior sharp-needle STB is a valid alternative to blunt-cannula post-aequator STB or epi-caruncular sharp-needle STB in anterior segment eye surgery. 82% of the 907 patients were able to undergo interventions on lens, capsula, cornea, iris and trabeculae without additional systemic analgesia. No grave sharp-needle complications (bulbar perforation, intraorbital bleeding, brainstem anaesthesia, strabism) occurred due to the needle-trajectory running parallel to the scleral surface. Conjunctival hemorrhage and negligible chemosis were comparable to other STB-techniques.",
  "authors": [
    {
      "affiliations": [
        "Ophthalmology, Unità Operativa di Oftalmologia Della Casa di Cura Rugani, Siena, Italy"
      ],
      "name": "Giuseppe Greco"
    },
    {
      "affiliations": [
        "Anestesia Pediatrica Senense, Universita di Siena, Siena, Italy"
      ],
      "name": "Cristina Navarra"
    },
    {
      "affiliations": [
        "Ophthalmology, Unità Operativa di Oftalmologia Della Casa di Cura Rugani, Siena, Italy"
      ],
      "name": "Benedetta Greco"
    },
    {
      "affiliations": [
        "Anaesthesiology, Institut d’anésthésie et Antalgie HUG, Geneve, Switzerland"
      ],
      "name": "Valeria Composto"
    },
    {
      "affiliations": [
        "Anesthesiology, Inselspital Berne, Bern, Switzerland"
      ],
      "name": "Gian-Fadri Jaeger"
    },
    {
      "affiliations": [
        "Anesthesiology, Inselspital Berne, Bern, Switzerland"
      ],
      "name": "Christian Vetter"
    },
    {
      "affiliations": [
        "Anesthesiology, Inselspital Berne, Bern, Switzerland"
      ],
      "name": "Friedrich Lersch"
    }
  ],
  "title": "P264 Modified sub-tenon’s block (STB) in anterior segment eye surgery: retrospective analysis of a ropivacaine-dexmedetomidine LA-mixture",
  "uid": "fcd713b5-1a13-5d70-8d51-b08d9447612c"
}