02900naa a2200265 a 450000100080000000500110000800800410001902400430006010000170010324501310012026000090025150001370026052019370039765000110233465300230234565300200236865300180238865300100240665300190241670000220243570000160245770000200247370000170249377301240251010628442022-03-16       2022    bl uuuu     u00u1 u    #d7 a10.1016/j.smallrumres.2022.1066652DOI1 aREGUEIRO, M.  aComparison between pulse oximetry and venous blood gas analyses to assess lamb asphyxia at parturition.h[electronic resource]  c2022  aArticle history: Received 28 June 2021; Received in revised form 2 March 2022; Accepted 3 March 2022; Available online 4 March 2022.  aABSTRACT: Early detection of fetal distress at lambing is essential to reduce mortality. Practicality and accuracy of pulse  oximetry to assess oxygenation status in newborn lambs under field conditions was evaluated. Oximetry was compared with blood gas analyses and included assessment of vitality (Apgar test) and vigour (attempt to and successful standing and suckling) of 135 Finnish by Polwarth lambs. Sampling of data was obtained immediately after fetal expulsion; percentage of oxygen saturation (satO2) was measured using a pulse oximeter clamped to an ear, and was compared with gas analyses variables measured from a jugular vein sample (Gas Analyser: SiemensRapidlab 248®). Correlations between satO2 measured by pulse oximetry and venous blood gas parameters either directly (partial pressure of carbon dioxide (pCO2), partial pressure of oxygen (pO2) and pH) or estimated  (bicarbonate concentration, extracellular fluid base excess, and oxygen saturation) were studied. Considering pH as a good indicator of hypoxia at parturition, data was grouped as: G1 = pH < 7.1; G2 = 7.1 ? pH < 7.2; G3 = 7.2 ? pH < 7.3 and G4 = pH ? 7.3. Saturation of oxygen measured by pulse oximetry correlated significantly with pCO2 (r = ? 0.50; P < 0.001), pH (r = 0.36; P < 0.001) and pO2 (r = 0.2, P = 0.04) measured by blood gas analyses. Lambs with low pH values (G1 = pH ? 7.1, acidosis) showed the lowest percentage to attempt and success to stand and suck, lowest Apgar score (G1 = 6.7, G2 = 8.6, G3 = 8.6, G4 = 8.5, P = 0.025), lowest percentage of satO2 measured by oximetry (G1 = 78.8%, G2 = 87.5%, G3 = 87.7%, G4 = 92.1%, P = 0.011) and  highest pCO2 (G1 = 78.5, G2 = 73.8, G3 = 65.8, G4 = 53.8 mmHg, P < 0.001). Pulse oximetry appears an accurate method to evaluate lamb birth asphyxia, helping to identify oxygenation constraints during labour, facilitating priority of perinatal handling, and thus improving lamb survival.  aOVINOS  aBlood gas analysis  aLabour phase II  aLamb asphyxia  aOvine  aPulse oximetry1 aJORGE-SMEDING, E.1 aSARAVIA, A.1 aLÓPEZ-MAZZ, C.1 aBANCHERO, G.  tSmall Ruminant Research, 2022, Volume 21, Article number 106665. doi: https://doi.org/10.1016/j.smallrumres.2022.106665