Thanks for the advice Dr. Planktonmd; pneumothorax was not suspected because of peak airway pressure, regardless of the no breathing sounds. So, let us say say to rule out pneumothorax; what shall we do "a decompression of the chest wall by inserting cannula at 2nd intercostal space, right?"; this would be disaster if it happened and not to mention the surgery team was requesting for the relative to come inside the OR room to see their guy alive; I was very curious as he asked twice. I would imagine if we punctured his chest and Inadvertently lead to pneumothorax? Honesty, I am glad to his Peak pressure wasn't elevated and ruled out pneumothorax and if even bronchospasm was treated. The lesson is that PPV would decrease both preload and afterload and to increase cardiac out in healthy individual, and this guy had an empty heart (the one thing I did which was unusual as I love it, I stopped the Peep respecting the physiology I have).
He was old guy, skinny and unknown goiter. We don't know his hypovolemia was for how long? We can't rule out his goiter and to be honest if this guy if he had SBO, I would go aggressively with fluids; it is not the first time to deal with DU acute abdomen, but not in the setting of sepsis to be honest, all were young with stable BP or upper border, not an old guy with 240/130 like on presentation and got a goiter; I am still blaming myself for that and thinking about how wild and tricky the presentation could be.
Thanks Dr. Planktonmd for your insight again.