Sorry for the wait but I've been a bit too busy to read through whole articles and still haven't, been lazy, but most arduously, I've been having difficulties finding outer body experience(OBE) with near-death experience(NDE). You see, it's not controversial that people have near-death experiences, nor is it controversial that people have outer body experiences. Nonetheless, I can find very few to no studies that
empirically study these two together. There are many types of induced OBE studies that's not related to NDE.
Most of the scientific studies on NDE are more concerned with how a dying brain can manifest experiences that are related to OBE or hallucinations. Trying to prove a soul/afterlife/god, etc just going on testimony does not mean much unless it can be proven, especially if it's a claim that's against verifiability. So, for instance, we usually disregard alien abduction testimony because there's no actual proof of alien stuff/aliens that we can examine. There are ton of induced OBE studies that have nothing to do with NDE, but that would not be relevant, unless you want to talk about that. However, you or another person might just say that these studies don't show anything(if proven inconclusive) because one can just say the person was high(it's not all drug induced btw). A high brain
Therefore, in order to know NDE testimony is real, we'd need to examine something the patient won't possibly know, but see it in an OBE. This would show,
irrefutably, that something similar to a soul/supernatural/unknown is going that has no possible medical explanation
The only empirical study I could find was the one that ecco posted. That study, apparently, was a hugely ambitious and took years, which came back inconclusive. As you can imagine, these studies must be hard to get off the ground because of the ethical implications. You have people dying in hospitals and it may be seen as extremely unethical to place some sort of experiment in the rooms of the patients while they're being saved or dying.
So I thought maybe we could examine a literature review of all the accumulated research that has to do with OBE and NDE. Here is a literature review that's fairly recent -
Do out-of-body and near-death experiences point towards the reality of nonlocal consciousness? A critical evaluation I skimmed it but It seems very easy to read. They also mentioned the study ecco posted since this literature review was written after said study.
Tell me when you'd like to start or you have an objection
Once you're ready I'll start reading it also.