Failed 3 hour Glucose Tolerance Test and need advice
Posted 01 August 2011 - 01:46 PM
I am a little concerned because there was another lady getting her 3 hour test done at the same time as me and, although it seems unlikely I wonder if somehow the vials of blood got mixed up. The tech took my blood and then 30 seconds later called her in to take hers.
For the last five days I have been monitoring my blood 2 hours after eating and have yet to have a reading above 104. (I even ate french toast with syrup and some strawberry yogurt, and that gave me my highest reading...104.) Usually my numbers 2 hours postprandial are in the mid to upper 80s. I have not altered my diet in any way. I go to my next OB appt on Wednesday, but I was just thinking that this whole thing seems a little weird and wanted to know if anyone had any insight.
Posted 01 August 2011 - 02:45 PM
Posted 01 September 2011 - 11:19 PM
As for the 80 point drop a person who didn't have problems with their blood sugar control would have dropped more and faster.
MDI - Lantus & Humalog
Mar 09 - 10.5
May 12 - 5.2
Oct 12 - 5.0
Posted 01 September 2011 - 11:40 PM
Art is right. Have them check your A1c. That lab reading will give a snapshot of your blood glucose over the last several months and not just a spot reading on what just ate in the last few hours. The A1c is the definitive guide.
A1C is not the 'definitive guide'. According to this paper in the ADA journal and many others 60-70% of diabetics diagnosed by FBG and OGTT have normal A1C numbers meaning for them A1C is relatively useless and completely useless for diagnostic purposes.
How Do We Diagnose Diabetes and Measure Blood Glucose Control?
Posted 02 September 2011 - 03:49 AM
Diet/Exercise since Aug 2010
1stAug10 : BG 178 Fasting / A1C : 8.00, Oct'10 6.9 / Jan'11 6.4
Apr'11 6.0 / June'11 5.9 / Oct'11 5.8 / Jan'12 5.6 / Apr'12 5.3
Now between 70-125 all the time
Posted 02 September 2011 - 12:54 PM
I agree that an A1C test is not very useful for gestational diabetes. Unlike type 2, gestational can begin rapidly, not over a long period of time. This is why the GTT is used to screen for it instead of just running a simple A1C.
For gestational diabetes, you only need to fail the test once. Gestational is not the same as type 2.
My understanding of the OGTT is. The fasting BG is recorded & a 75 gm glucose dose is give. One has to be below 200 at the 1 hr mark, and less than 140 at the 2 hr mark. How much glucose were you given ? To be termed diabetic, you need to fail the test on 2 occasions. So get another test after 2 weeks.
Diagnosed Type 2 May 21, 2008, A1C 9.5, Fasting Glucose 214
Had Duodenal Switch (DS) surgery to resolve diabetes on March 27, 2009.
Most recent A1Cs prior to surgery: 8.1 and 7.9 while on 2500mg metformin and 50mg Januvia (sitagliptin)
A1C on 7/10/2009: 5.4
A1C on 12/3/2010: 4.9 (off all meds)
6/9/2011: A1C of 4.6, fasting: 70, fasting insulin: 2 :D:D
A1C on 10/13/11: 4.8 (fasting: 60)
A1C in August 2012: 4.9
A1C on 3/11/2013: 4.8
Posted 03 September 2011 - 12:39 AM
If you would feel more comfortable, ask if they can redo the test.
I had the opposite experience. Barely failed the initial test, barely failed the 3hr test, but then once I started testing I was seeing 140's after meals and placed on fast-acting insulin w/meals for the duration of the pregnancy.
Diagnosed: 6/30/11 (failed OGTT with bg around 260 at 2 hours)
A1C at diagnosis: 5.6
11/12/11 A1C (using A1CNow selfcheck): 5.2
12/19/11 A1C 5.5
4/9/12 A1C 5.5
10/22/12 A1C 5.5
Taking Metformin 500mg/3x day
History of gestational diabetes in '02
Posted 21 October 2011 - 12:10 AM
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