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RJP: I'll try to address each one of your points...
Ironically, your point assumes the only fear is that the person may have inaccurately completed the form and the potential that any NO answer may actually be inaccurate. (False negative) What about the potential for a person to have accurately written YES to one of the conditions? What you are saying is that we should also treat that as inaccurate or at minimum as "unknown." However, the risk associated with modifying treatment decisions due to a "False Positive" on the form is essentially ZERO.
My last post didn't "assume" a "false negative" as you describe it. I
explicitly stated the possibility that a diver may have given a "No" answer to a question regarding a certain medical condition, yet I didn't exclude the possibility of "false positive" information. I was trying to share with you the notion that, when it comes to patients, health professionals are taught to operate in a "trust but verify" mode. False positive and false negative information being conveyed from patient to doctor occurs more often than you might think. If you were to spend some time around a patient with an altered level of consciousness, this would become abundantly clear.
To be clear, modifying treatment decisions due to "False Positive" information
can have a negative impact on patient care. Here's one specific example: If a patient with a bacterial infection states that he has an allergic reaction to a broad-spectrum first-line antibiotic (when he actually doesn't) then the treatment team has to go to another class of antibiotic which may end up being not as effective as the first line drug. Furthermore, the side effect profiles could be significantly worse and the cost could be higher. Bear in mind that this is just one of many examples.
"Hey Bob, says here the guy has a steel rod in his left leg." Do you then say "That information could be wrong, so let's be careful and treat him as if he doesn't have a steel rod in his leg" as you're sending him for an MRI?
This statement of yours makes very little sense, but I'll indulge you. If an MRI were necessary in an emergent situation and Bystander Bob was not a reliable witness, then it would make sense to do a quick X-ray first.
All this dancing on the head of pin is just plain silly. The fact of the matter is that there is no medical UPSIDE to lying on the form. Nor is there any medical DOWNSIDE to having a TRUTHFUL YES response accurately reflected on the form.
I think the condescending tone of your posts undermines the point you are trying to make. At the heart of the conflict playing out on this thread is that you are only seeing the medical ramifications of lying on the forms. There are concomitant privacy issues to consider, too.
I just can't think of a single situation - other than shear laziness or utter selfishness - where something would happen to cause you to say "Whew, that was close! Thank god I lied on that form..."
Awww.
Cut it out!
I'm sure that if you tried hard enough, you could come up with something. It would probably be something completely unintentional (from the perspective of the person filling out the form), though.
Don't get me wrong. Patients should be honest with their doctors -- doing so will likely lead to a better outcome. It would also be great if people didn't feel compelled to lie on these silly CYA forms that dive ops are using nowadays. If everyone refused to fill them out, then the practice would be dropped or revised. Fortunately, in the areas that I dive, the dive ops don't require a pre-dive medical questionnaire to be filled out...usually just a liability waiver. With a new dive op, I ask ahead of time so there are no surprises on the day of the dive.