The Diagnostic experts think there's a 20% chance that Kalorm's gut situation will resolve with the current treatment plan in motion, within 4-6 hours and without any deterioration in his condition that would prompt them to escalate. If they add the ileocecal valve device, that rises to 35% – if they include placing a couple of electrodes to stimulate the terminal ileum (and hope that the nerve plexus is intact enough that this will result in some signals making it further up and informing the stagnant area that it's fine to move along now), then 40%.
This isn't a great number! And Kalorm's odds of a good outcome, especially if they end up resorting to major abdominal surgery, are definitely worse if they wait until he's already rapidly deteriorating.
The main complication that would prompt them to escalate faster is sudden worsening hemodynamic instability; the markets think there's a 20% chance of this within 2 hours and a 60% chance within six hours (assuming they haven't yet escalated the treatment). Kalorm is arguably already hemodynamically unstable, already in the early stages of shock, because he's requiring vasopressor support, even off sedation and with lots of fluids. His lactate is rising, hinting that not all of his tissues are getting enough circulation for comfort. He's hanging on for now, but barely; if his blood pressure crashes enough that they need to restart the epinephrine, this is a very bad sign, especially because it will reduce circulation to the gut and dramatically increase the risk both of microvascular blockages and ischemia, and more bacteria slipping through an undersupplied epithelial barrier. It would at that point be reasonable to go straight to the OR – but anesthesia on a patient already requiring that much vasopressor support even without sedation is not a reassuring prospect. Even if he makes it through, they're risking long periods of profound hypotension, which won't do his organs any good – and that includes his brain, so they're not just risking a longer and more grueling recovery, but much worse permanent deficits. The markets think that if they wait until Kalorm is deteriorating before trying a last-ditch surgical intervention, there's a 20% chance that he crashes while in the OR, a 10% chance of cardiac arrest, and a 5% chance of significant and prolonged enough oxygen deprivation to pull him over into the "moderate" brain damage category.
(The odds that, in the short run, they wouldn't be able to resuscitate him after a cardiac arrest are low, probably less than 1 in 500 - at worst they'll just put him back on the full cardiopulmonary bypass - but it would drastically worsen his outcomes, and increase the risk that he doesn't survive to hospital discharge, up to maybe as high as 10%. Assuming they can avoid letting it get that far, the median fatality rate for "sepsis in immunocompromised patients" is around 5% - but most of those patients are pretty sick going into it; they often have cancer and received chemotherapy, or are on immunosuppressants for an autoimmune condition, or have a genetic immune deficiency that tends to come along with other health problems. With Kalorm in particular, given that he's still, at this point, not looking terrible, and they have a good idea of what precisely went wrong and have already started antibiotics - they think that his baseline risk of dying from this is around 1%. One in 100. Still not a very happy number, but...better.)
They should definitely avoid this! The problem is that even an uneventful and successful surgery will have a number of negative effects for Kalorm's recovery and long-term prognosis. Going in and handling his intestines will only make the motility issues worse and slower to resolve, he's simultaneously at risk of bleeding AND of developing clots, and it will escalate the systemic inflammatory response even further. The antibiotics are hopefully going to get the infection under control, but they can't count on that doing anything to halt the inflammatory cascade once it's already gotten this far.
Other potential complications:
- Significant respiratory deterioration. This could be because of a missed deep vein thrombosis ending up in his lungs (though despite his skyrocketing risk for clotting dysfunction, the markets put less than 5% odds on this happening in the next 6 hours and 1% in two hours), or - more likely - downstream of systemic inflammation making his capillaries leaky, and sending toxic cell-death and bacterial-metabolism compounds to damage lung tissue, which they think is about 30% likely to happen at all within six hours badly enough to require much higher oxygen (15% within two hours) and 15% likely to result in needing to be reintubated for purely respiratory reasons (only 3% within two hours, he has a lot of reserve). If he requires a lot more fluids to maintain his blood pressure, that's also a risk factor for pulmonary edema - only 10% likely, his heart is still in relatively good shape, but independently from the others.
- Deteriorating mental status, to the point of needing reintubation just for airway protection. This is a lot more likely if he's also having other physiological deterioration - 70% if he becomes significantly hemodynamically unstable - but it could happen in isolation, just as a result of cascading inflammation and neurotoxic compounds in his blood. They think that's 10% likely in isolation over the next 2 hours and 20% over the next six, but it bodes especially poorly for his recovery. Increasing confusion or delirium is even more likely, call it 40% in the next six hours.
- Deteriorating kidney function from the sepsis. Prolonged low blood pressure makes this almost certain, but even if they can maintain his hemodynamics, the inflammatory cascade alone is about 15% likely to cause this to happen within 6 hours (and 30% likely within 24 hours, but at that point they'll have made a decision on treatment, one way or another). It's not an immediate medical emergency, unlike some of the other complications, but it's not great for his long term prognosis.
- Cardiac arrhythmias. This isn't that likely if they keep his electrolytes in parameters, but they're still calling a 10% chance that his heart becomes irritable enough to start throwing potentially dangerous arrhythmias within 6 hours (though only 3% within two hours.)
- Massive GI bleed. Call it a 2% chance within two hours, but a 15% chance within six hours IF they haven't decided to escalate yet despite a not-very-effective response to the conservative treatment.
Adding up all of those dice rolls gives a pretty not-great overall risk! But Treatment Planning thinks it's probably an acceptable risk to take for two hours - by which point they'll have at least a preliminary sense of how quickly peristalsis is increasing along how much of Kalorm's gut. They are, needless to say, going to monitor him SO closely, and think hard about which other diagnostic tests would be informative and worth the risk.