ORIGINAL_ARTICLE Providing a secure airway management during general anesthesia could be problematic in some medical cases, especially when there is a risk of regurgitation and aspiration of the gastric content due to increased intragastric pressure. The current study aimed to test the applicability of two types of LMA in several animal species and to compare its effectiveness to the endotracheal intubation method in securing sealed airway respiration as an alternative to using endotracheal tubes. The study was conducted in dogs (n=33), cats (n=9), swine (n=9), rabbits (n=5), sheep (n=7) and roe deer (n=1). One or both types of laryngeal masks were used for each animal species: LMA Classic™-cLMA and LMA ProSeal™-PLMA. The assessment of each laryngeal mask was performed by determining the insertion technique, the possibilities of first-attempt insertion and malposition, the compliance with various animal species, ventilation time, cuff pressure, and sealing capacity. The highest LMA size compatility in dogs (23,87±14,30 kg) was size-3 in six and size-4 in forteen subjects; In swine (43,22±12,32 kg), size-4; In rabbits (3,84±0,36 kg) size-1; and in sheep (48,29±4,65 kg) size-3 and size-4. Ventilation time was highest in swine and roe deer (121,11±42,85 min and 300,00 min, respectively) and lowest in cat (28,33±16,96 min). First-attempt LMA insertion success was lowest in rabbits (60%), and highest in sheep and roe deer (100%). Malposition was with highest rate in rabbits (40%) and lowest in cat, sheep and roe deer (0%). Gastric reflux was most frequently observed in sheep (71,4%) and roe deer (100%). The usage of LMA in the veterinary anesthetic practice significantly improves airway management in animals during general anesthesia. The inflated LMA cuff does not prevent its disposition. Therefore, both the drain and respiratory tubes must be fixed. The usage of LMA in rabbits was associated with higher incidence of malposition and other complications. Our findings suggest that LMA designed for humans can be used for airway management in veterinary medicine. https://macvetrev.mk/Files/Article/2020/10.2478/macvetrev-2020-0020/macvetrev-2020-0020.pdf 2020-10-15T09:00:00 131 139 10.2478/macvetrev-2020-0020 laryngeal mask supraglottic airway devices gastric content aspiration general anesthesia veterinary medicine Petra Vidricková vidrickova@gmail.com false 1 Equine Clinic, University of Veterinary Medicine and Pharmacology in Košice, Komenského 73, 041 81, Košice, Slovak Republic LEAD_AUTHOR false 2 AUTHOR Martin Boldižár false 3 BoldiVet Veterinary Practice, Seniakovce 29, 082 03, Seniakovce, Slovak Republic AUTHOR Sager, J. (2018). Supraglottic airway devices and tracheal tubes and stylets. In: K.G. Cooley, R.A. Johnson, Veterinary Anesthetic and Monitoring Equipment (pp. 177-178). Hoboken: Wiley Blackwell. PMid:29854387 PMCid:PMC5956637 1 10.1002/9781119277187.ch14 McNarry, A.F., Patel, A. (2017). The evolution of airway management - new concepts and conflicts with traditional practice. British Journal of Anaesthesia 119(1): 154-166. PMid:29161401 2 10.1093/bja/aex385 Fujita, M., Orima, H., Simazu, M., Motoyoshi, S., Katayama, M., Miyasaka, K. (1991). Use of laryngeal mask airway in small animals. J Vet Med Sci. 53(6): 1081-1082. PMid:1790220 3 10.1292/jvms.53.1081 Brimacombe, J. (1995). The advantages of the LMA over the tracheal tube or facemask: a meta-analysis. Can J Anaesth. 42(11): 1017-1023. PMid:8590490 4 10.1007/BF03011075 Wiederstein, I., Auer, U., Moens, Y. (2006). Laryngeal mask airway insertion requires less propofol than endotracheal intubation in dogs. Vet AnaesthAnalg. 33(4):201-206. PMid:16764583 5 10.1111/j.1467-2995.2005.00254.x Kazakos, G.M., Anagnostou, T., Savvas, I., Raptopoulos, D., Psalla, D., Kazakou, I.M. (2007). Use of the laryngeal mask airway in rabbits: placement and efficacy. Lab Anim.36(4): 29-34. PMid:17380146 6 10.1038/laban0407-29 Reed, F., Iff I. (2012). Use of a laryngeal mask airway in a brachycephalic dog with masticatory myositis and trismus. Can Vet J. 53(3): 287-290. 7 Brain, A.I.J., Verghese, C., Strube, P.J. (2000). The LMA 'ProSeal'-a laryngeal mask with an oesophageal vent. Br J Anaesth. 84(5): 650-654. PMid:10844848 8 10.1093/bja/84.5.650 Brimacombe, J.R. (2005). Laryngeal mask anesthesia - principles and practice (p. 700). Edinburgh: Saunders. 9 Wiederstein, I., Moens, Y.P. (2008). Guidelines and criteria for the placement of laryngeal mask airways in dogs. Vet Anaesth Analg. 35(5): 374-382. PMid:18466166 10 10.1111/j.1467-2995.2008.00398.x Asai, T., Murao, K., Katoh, T., Shingu, K. (1998). Use of the laryngeal mask airway in laboratory cats. Anesthesiology 88(6): 1680-1682. PMid:9637667 11 10.1097/00000542-199806000-00037 Wemyss-Holden, S.A., Porter, K.J., Baxter, P., Rudkin, G.E., Maddern, G.J. (1999). The laryngeal mask airway in experimental pig anaesthesia. Lab Anim. 33(1): 30-34. PMid:10759389 12 10.1258/002367799780578480 Fulkerson, P.J., Gustafson, S.B. (2007). Use of laryngeal mask airway compared to endotracheal tube with positive-pressure ventilation in anesthetized swine. Vet Anaesth Analg. 34(4): 284-288. PMid:17490468 13 10.1111/j.1467-2995.2006.00329.x Rokamp, K.Z., Secher, N.H., Møller, A.M., Nielsen, H.B. (2010). Tracheal tube and laryngeal mask cuff pressure during anaesthesia - mandatory monitoring is in need. BMC Anesthesiol. 10, 20. PMid:21129183 PMCid:PMC3016349 14 10.1186/1471-2253-10-20 Goldmann, K., Kalinowski, M., Kraft, S. (2005). Airway management under general anaesthesia in pig using the LMA-ProSeal: a pilot study. Vet Anaesth Analg. 32(5): 308-313. PMid:16135212 15 10.1111/j.1467-2995.2005.00248.x