Quote:
Originally Posted by in_newengland
OMG, this thread is from a long time ago. Yes, they scheduled me for a virtual colonoscopy instead and it was fine.
Then I changed doctors and hospitals and have never had this mysterious "no detectable blood pressure" issue again. They have always had a hard time drawing blood from me. They say I have narrow, movable veins. My cousin has the same problem when getting blood drawn. I have been told to drink a lot of water before having blood drawn.
Maybe I was dehydrated due to all the pooping during the prep.
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Yeah, I noticed the age of this thread, so was reluctant to post anything, but since you've updated it ,and you seem to have recovered from your undetectable blood pressure ordeal, I thought I would add my two cents, and relate my daughter's experience involving undetectable blood pressure. She's 33.
This occurred with her about 4-5 months ago, she was having issues with severe GERD due to a nearly non-functioning esophageal sphincter (she has a genetic condition that results in defective collagen/connective tissue and affects many of her organ systems). She couldn't keep anything down, not even water, for a number of days, and she was taking prescribed diuretics to control the effects of heart failure (that's another whole story), so she was depleting herself of fluids over that time. When she took her blood pressure, it was either extremely low or undetectable, and when she reported that she had stopped peeing, and in fact passed out, we took her to the ER. They couldn't find a blood pressure either, and drew blood, then started her on IV fluid pushes as it was apparent that she was extremely dehydrated. When her labs came back, they told us she was in renal failure (creatinine was over 5.0, normal range 1.0 or less), and admitted her for more IV fluids and monitoring. As you mentioned they might have been more panicky about not detecting a blood pressure if she had been semi-conscious or not responding, but they believed it was due to her extreme dehydration which along with the acute renal failure would be corrected by several days of IV fluid. And it was. Her kidneys turned out to be fine (her creatinine was back to normal in 3 days), she had her GERD issues addressed and they are better now, they told her to lay off the diuretic a few days, and her cardiac issues are more or less stabilized now.
I'm guessing, like others have said, that your undetectable blood pressure was caused by extreme dehydration-thats a long time to go from evacuating everything you've got (liquid too) in response to the colonoscopy prep, not eating or drinking after a certain time, and having the colonoscopy in the afternoon. Individual reserves vary and it may be as a thinner person (maybe elderly too?) yours were less than some others. The fact that you said you had stopped peeing is a big clue-that's severe dehydration and a harbinger of acute kidney failure, or so we were told. My daughter didn't have to pee till after they had completed her 3rd IV bag, I have to say I don't think we ever welcomed a trip to the bathroom as much as we did that one as it meant her kidneys were working.
In any case, I'd hope they take some consideration of you and schedule colonoscopies early in the day from now on.