Inhalant induction alone is contraindicated in chelonians — their dive reflex and ability to shunt blood away from pulmonary vessels in low-oxygen environments make gas-only induction unsafe; all protocols require injectable agents either preceding or combined with inhalants.Journal of the…
Alfaxalone is the current injectable agent of choice, valued for its flexibility across routes (SC, IM, IV) and functions (premedication, induction, and maintenance as a single dose, multiple doses, or constant rate infusion).Journal of the… IV alfaxalone produces faster induction and shorter total anesthesia time compared to IM alfaxalone, though both routes provide safe, effective sedation.Journal of the… IV access can be difficult in small, dehydrated, or α-2 agonist-premedicated chelonians.Journal of the…
For opioid analgesia, hydromorphone is the current opioid of choice in chelonians, providing effective antinociception without the side effects seen with morphine (prolonged respiratory depression and hyporexia).Journal of the… Butorphanol is not recommended due to questionable antinociceptive properties in chelonians.Journal of the…
Tiletamine-zolazepam (TZ) produces moderate sedation in red-eared sliders (Trachemys scripta elegans) via the SC route regardless of injection site.Journal of the… Recovery times with TZ can be prolonged — in bearded dragons (Pogona vitticeps), mean recovery times range from 57 to 69 minutes, though this is a different species.Journal of the…
All injectable drugs should be administered in the cranial half of the body. The renal portal system in chelonians means caudal-half injections risk altered pharmacokinetics and pharmacodynamics for nephrotoxic or renally excreted drugs.Journal of the…+1 Cranial-half administration is recommended regardless of the practical advantage of reduced bite risk with caudal injections.Journal of the…
Temperature directly governs drug clearance and recovery. Metabolic rate is already 10–30% of that in similarly sized mammals, and it slows further below the preferred optimum temperature zone — 26–38 °C for terrestrial species and 25–35 °C for aquatic or semiaquatic species.Journal of the… Patients outside this range will have prolonged drug clearance and recovery.
Recovery carries pneumonia risk because chelonians lack a diaphragm for coughing and their mucociliary apparatus terminates outside the glottis, impairing airway clearance.Journal of the… Reversal agents and epinephrine should be factored into protocol selection to shorten recovery time.Journal of the…
The sources do not provide specific mg/kg induction doses for alfaxalone, hydromorphone, or TZ in chelonians. The WSAVA and AAHA dosing values in the available sources (e.g., alfaxalone 1–2 mg/kg IV, TZ 3–4 mg/kg IM) are derived from dog and cat guidelines and are not directly applicable to chelonians.WSAVA Global Gu…+1
| Agent | Route(s) | Key Chelonian Data | Key Caveat |
|---|---|---|---|
| Alfaxalone | SC, IM, IV | IV faster induction and shorter anesthesia than IM; both routes safe and effectiveJournal of the… | IV access difficult in small/dehydrated patients or after α-2 agonistJournal of the… |
| Hydromorphone | — | Effective antinociception, no reported side effects in cheloniansJournal of the… | Replaced morphine (respiratory depression, hyporexia) and butorphanol (inadequate analgesia)Journal of the… |
| Tiletamine-zolazepam | SC | Moderate sedation in red-eared sliders regardless of injection siteJournal of the… | Prolonged recovery; 57–69 min mean in bearded dragons (different species)Journal of the… |
| Inhalant agents alone | Inhalation | Contraindicated as sole induction methodJournal of the… | Must be preceded by or combined with injectablesJournal of the… |
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