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Equine minimally invasive surgical techniques are frequently utilized in the treatment of a variety of conditions. Standing sedated endoscopic surgery is commonly selected in horses, requiring specialized facilities, anesthetic protocols, and surgeon and assistant expertise. This review examines current methods and potential strategies in equine soft tissue surgery, in which there is an emphasis on laparoscopic urogenital and gastrointestinal diagnostic and therapeutic procedures. Thoracoscopy is less frequently reported in horses and may be underutilized. Optimizing procedures and outcomes in soft tissue surgery relies on innovation and interdisciplinary collaboration. Modern advances in surgical equipment and emerging medical technologies support development in these fields. Participation in continuing education is effective in acquiring and sustaining knowledge and skills and improving clinical practice. Forums with an integrated approach could rapidly expand knowledge across species.
Equine minimally invasive surgical techniques are frequently utilized in the treatment of a variety of conditions. Standing sedated endoscopic surgery is commonly selected in horses, requiring specialized facilities, anesthetic protocols, and surgeon and assistant expertise. This review examines current methods and potential strategies in equine soft tissue surgery, in which there is an emphasis on laparoscopic urogenital and gastrointestinal diagnostic and therapeutic procedures. Thoracoscopy is less frequently reported in horses and may be underutilized. Optimizing procedures and outcomes in soft tissue surgery relies on innovation and interdisciplinary collaboration. Modern advances in surgical equipment and emerging medical technologies support development in these fields. Participation in continuing education is effective in acquiring and sustaining knowledge and skills and improving clinical practice. Forums with an integrated approach could rapidly expand knowledge across species.
BackgroundElectrical impedance tomography (EIT) has been an essential tool for assessing pulmonary ventilation in several situations, such as the alveolar recruitment maneuver (ARM) in PEEP titration to maintain the lungs open after atelectasis reversion. In the same way as in humans and dogs, in horses, this tool has been widely used to assess pulmonary aeration undergoing anesthesia, mechanical ventilation, recruitment maneuver, standing horses, or specific procedures.ObjectivesThe present study aimed to evaluate the distribution of regional ventilation during ARM based on lung monitoring assessment by EIT, with a focus on better recruitment associated with less or no overdistention.MethodsFourteen horses of 306 ± 21 kg undergoing isoflurane anesthesia in dorsal recumbency were used. The animals were mechanically ventilated with a tidal volume of 14 ml kg−1 and a respiratory rate of 7–9. An alveolar recruitment maneuver was instituted, increasing the PEEP by five cmH2O every 5 min until 32 cmH2O and decreasing it by five cmH2O every 5 min to 7 cmH2O. At each step of PEEP, arterial blood samples were collected for blood gas analysis, EIT images, hemodynamic, and respiratory mechanics.ResultsAssociated with the CoV-DV increase, there was a significant decrease in the DSS during the ARM and a significant increase in the NSS when PEEP was applied above 12 cmH2O compared to baseline. The ComplROI showed a significant increase in the dependent area and a significant decrease in the non-dependent area during ARM, and both were compared to their baseline values. The driving pressure decreased significantly during the ARM, and Cst, PaO2, and PaO2/FiO2 ratio increased significantly. The VD/VT decreased significantly at DEPEEP17 and DEPEEP12. There was an HR increase at INPEEP27, INPEEP 32, and DEPEEP17 (p < 0.0001; p < 0.0001; and p < 0.05, respectively), those values being above the normal reference range for the species. The SAP, MAP, DAP, CI, and DO2I significantly decreased INPEEP32 (p < 0.05).ConclusionThe ARM by PEEP titration applied in the present study showed better ventilation distribution associated with better aeration in the dependent lung areas, with minimal overdistention between PEEP 17 and 12 cmH2O decreasing step. Those changes were also followed by improvements in static and regional compliance associated with increased oxygenation and pulmonary ventilation. ARM promoted a transitory decrease in arterial blood pressure and depression in CI with a concomitant drop in oxygen delivery, which should be best investigated before its routine use in clinical cases.
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