Update on Pedro and the RVC Trial (UK)

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KleineMue

Member Since 2014
Hello, hello!!

I have been meaning to post an update on Pedro and the Royal Veterinary Collage feline diabetes remission clinic trial for a while but haven't had a chance until now, but since I should be doing my tax return today I thought this is the perfect opportunity to avoid that and write how we are getting on instead.

Our first visit was Monday, 05 January and Pedro stayed with Ruth at the clinic for 3 days in order to have a number of different examinations and tests to screen for underlying diseases and any issues that would prevent him from participating in the trial. Ruth sent me daily updates and much to my delight she gave Pedro a clean bill of heath bar the diagnosis of diabetes.

He joined the Lantus test group and off we went with a shooting protocol of 2 units twice a day, Purina DM food and an AlphaTrak2 glucometer.

Within a couple days of coming home Pedro's numbers started to come down with the Lantus building up a depot and all, until they hit rock bottom at 4.4 mmol/l Saturday morning. I injected him with a marginally reduced dose and my husband kept a very close eye on him for the rest of the day while I was in work. He stayed very low and eventually, thanks to feeding him medium carb rich foods he came back up and then spent a few days bouncing very high numbers. I had sought advice on this board as well and with everything I had read about Lantus we then went to shooting 1 unit, 0.25 units per kilogram. I also emailed Ruth and she agreed to keep him on 1 unit for now and also sent me a shooting protocol to help make decisions when to shoot and when not to shoot.

Numbers aside Pedro was doing really well over all, very active and bright, playful, picking up old habits of playing and hunting toys again, all super! ^_^

The next few days Pedro's numbers stayed rather erratic and busy, mostly high with the odd medium nadir (Ruth wrote up this period like this: "Pedro was discharged on 2U glargine twice daily after he had a pre-insulin blood glucose concentration of 4.4mmol/l on 10th January. Since this time, Pedro has appeared more polydipsic and more polyphagic. Pedro otherwise seems more playful and active.") and before we knew it we were back at RVC (19 - 22 Jan) for his first check up.

In her discharge report Ruth wrote:
"Procedures performed
Serum fructosamine concentration - 443 umol/l (RI 205 -322 umol/l) consistent wit very good recent glycaemic control.

24-hour blood glucose curve using 1 U glargine BID and Purina DM tinned food - first 12 hours revealed a glucose range of 4.4-12.4 mmol/l. Pedro had a blood glucose of 10.5 at the time of next injection. The second 12 hours revealed a blood glucose range of 18.5 - 12.9 mmol/l.

Diabetes Clinical Severity Score - 4 out of 12 (mild to moderate clinical signs). 24-hour water diary - 257 mls over 24 hours. No problems with measurement.

24-hour water diary - 257 mls over 24 hours. No problems with measurement.

24-hour urination frequency - 6 episodes.

The following has become available since Pedro was last seen at our clinic: IGF-1 concentration - unremarkable (489ug/ml)."

When I picked Pedro up on Thursday Ruth explained that they are really happy with the reduction of the fructosamine levels and she also explained that during his stay at the clinic his glucose levels had dropped to a similar low/normal levels as they had a couple weeks earlier. Obviously they kept a very close eye on him and also kept injecting him, and she also explained that Lantus is the kind of insulin where cats can dip low without necessarily going into a hypoglycaemic state. She therefore discharged him on Thursday with a variable insulin dose shooting protocol.

This is what she wrote:
"We are pleased that Pedro's activity level has improved over the last 2 weeks. His blood fructosamine concentration, which indicates his diabetic control over the last 2 - 3 weeks, has also improved since his last visit and is now in a good range for a cat. However, some of his other diabetic signs, and his bodyweight, have yet to show an improvement.

As Pedro experienced an episode of having a normal blood glucose at the time of injection, and because you are in the habit of checking his blood glucose at the time of injection, Pedro is being discharged with a variable insulin dose-rate, as shown below.

Pedro's blood glucose is next due to be assessed when he is re-examined at our clinic in approximately 2 weeks' time. Wednesday 4th February would be suitable, if convenient with you.

Medication
Insulin glargine (Lantus) - please inject twice daily, 12 hours apart, at the time of feeding according to the dosing scheme below:

Blood glucose is less than 3 and Pedro has eaten well: contact a veterinary surgeon before giving insulin. Pedro has eaten well and blood glucose is 3.1- 6.5: half a unit of insulin.
Pedro has eaten well and blood glucose is 6.5 - 9.4: 3 quarters of unit of insulin.
Pedro has eaten well and blood glucose is 9.5 - 12.4: 1 U of insulin.
Pedro has eaten well and blood glucose is 12.5 - 19.9: 1.5 U of insulin.
Pedro has eaten well and blood glucose is 20 of over: 2 U of insulin.
Pedro has not eaten = Contact veterinarian before giving insulin.

Please continue to feed Pedro his Purina DM diet.

****Please be aware that diabetic cats can experience hypoglycaemic episodes. Signs of this include drowsiness, lethargy, wobbliness, disorientation, blindness and seizures. If Pedro starts showing these signs, please rub about 0.5ml of honey, glucose gel or sugar onto his gums and contact a veterinary surgeon immediately. You can also check his blood glucose at home, if capable of doing so. Hypoglycaemic episodes would usually occur when blood glucose is less than 3.0 ****."

So, just before I was working on my tax return and Pedro came, meowing in a way that instantly told me he was low, 2.6 mmol/l *shriek* I fed him small amounts of food and within 15mins he was up to 4.0 and is now settled asleep behind me, happy and content.

I imagine what lies ahead of us is learning that careful balancing act of helping him hold those low numbers, not accidentally feeding him into sugary heights so prevent too much bouncing about and overall see if he can actually go into remission, hold normal numbers without needing insulin.

Once that darn tax return is done I will be curious to read more about cats on here who have gone into remission, how it was, what helped, what to consider and what not to do! Any links or ideas would be much appreciated!!

Right, I shall return to my books *sigh*
And am looking forward to catching up soon!
Lots of love,
Wibke & Pedro x
 
We normally keep the Lantus dose consistent, rather than adjusting it based on the pre-shot. You might share the Roomp & Rand article with them.
 
Thank you for taking the time to write up an update for us.

I've been very interested in watching how this clinical trial plays out. The longer Pedro stays in normal numbers the better. You will probably find it necessary to adjust (decrease) the dosing scale they gave you as his pancreas heals. Basically, that's how you'll know when he might be heading towards remission. The dosing scale will have to be decreased to the point where you can no longer administer insulin safely (without fear of going too low). Gradually decreasing the dose while kitty remains in normal numbers is how most kitties will head into remission... if they go into remission at all. This is pretty much true no matter what method or protocol is used to regulate or get them off the juice.


Good luck and keep us posted!
 
*nods* Yes, they have the article. :)

And yes, I imagine that balancing act will see a close collaboration with the vet to get the dosage right. We are back in London week after next. Much looking forward to hearing how Pedro is doing with this variable insulin dosage shooting protocol.
Mue x
 
Very interesting! Thanks for giving us such a complete diary of the trial experience. It is different that what we use with the TR protocol - i'm going to be very interested in seeing the results of the trial.

Do you know what they consider as "normal BGs" using the AlphaTrak 2?
 
Please do keep us updated. I'm also very interested in how the trial plays out. It's nice to see them pushing the envelope and it will be interesting to see the results.
 
Thank you so much for sharing. It's interesting to see their dosing scale. Makes me wonder what else they are testing.

Also thanks for sharing the discharge notes. We don't often see kitties get IGF-1 testing done that aren't high dose, so it's interesting to see what normal numbers can look like.
Numbers aside Pedro was doing really well over all, very active and bright, playful, picking up old habits of playing and hunting toys again, all super! ^_^
That's a great report! :):)
 
Much more interesting that your tax return!

Do you know how many cats are in the trial and if they're all being treated the same way, i.e. with variable rather than consistent dosing?

P.S. you are correct about the balancing act :)
 
When I asked Ruth at our last visit she said there are currently 32 cats in the trial and the trial has been up and running for a year. This figure does not include cats who have already completed their year or have been discharged for any reason. I didn't ask her about how many cats are on the variable dose schedule, but she did say that she considers the trial to be a bit less 'risk-averse' when it comes to giving insulin when faced with low numbers. I think 'pushing the envelop' is a good way of looking at it and I guess we will know a bit more about how the variable dose schedule works when they are redoing Pedro's bloods and hopefully check for the fructosamine levels again which would indicate how well controlled the diabetes was and what (if any) progress we have made.

His numbers overall look good in comparison to how they were during a week on 2 units and another week on 1 unit. Curious how there has been a dip on both Saturday mornings after I picked him up again. This time round there was a lower dose of insulin and a less pronounced 'bounce' although he did register some rather high/black numbers and we also suspect he went out to find some food one night.

Why am I writing this at 1.43am? Because following my daughter having thrown up all over our bed shortly past midnight and having had to strip and change us all she went back to sleep but I couldn't, and so I read and then I heard a noise and then I went downstairs to check. After stepping into a hairball vomit puddle I found Pedro scavenging for food. He dropped the butter dish off the kitchen counter but it wasn't open. He tells me he's low (seriously, the way he meows and looks at me, he lets me know exactly what's going on), I test him. 2.2 mmol/l (40). F$%&!! Food! NOW!

He doesn't show any sign of hypoglycaemia, he is bright, alert, focussed on finding food, no wobbles, nothing. I feed him and 15 minutes later he is 3.6mmol/l (65), another 15 minutes later 3.8 (68) and I give him a bit more food, 15 minutes later 4.4 (79) and has settled down next to me to sleep. Tested him again and now he is 7.1 (128), sitting on my lap purring. I can go to bed now.

*phew*
nite nite! x
 
Before I went to bed last night I emailed Ruth about the developments of the night and after looking at his numbers she adjusted the variable insulin dosages starting tonight:

Pedro has eaten well and blood glucose is 10 or less: half a unit of insulin.
Pedro has eaten well and blood glucose is 10.1 – 12.5: three quarter Units of insulin.
Pedro has eaten well and blood glucose is 12.5 – 15.5: 1 U of insulin.
Pedro has eaten well and blood glucose is 15.5 – 19.9: 1.5 U of insulin.
Pedro has eaten well and blood glucose is 20 of over: 2 U of insulin.
Pedro has not eaten = Contact veterinarian before giving insulin.

He spent most of the day in the mid 20s. ^_^ x
 
aackkkk! vomit on your bed. stepped on a mooky hairball puddle. found low numbers waiting by the butter dish.

i hope today turns out better.

i'm so interested in this variable dosing idea & can't wait to hear how things work out in the study.
 
Hello there,

We are a few days into the new revised variable insulin dosage and I thought I briefly share a snapshot of our numbers.

It appears our mornings start nice and low and over the course of the past few days we probably would have had low curves had I been at home to test him. Caught him on occasion with low numbers and then fed 1/4 tin Purina as per recommendation from Ruth and tested again, repeated until he got back to medium numbers. When I catch him with crazy low numbers (2.x) then I feed him a small amount of Sheba fresh flakes or similar for a bigger boost and then go back to 1/4 tins of Purina.

Our evening numbers however are erratic and I think it is to do with how we feed him in the evenings. I tend to come home around 5.30pm and am usually met by two seemingly starving cats who wouldn't leave me alone until I fed then, including staging dirty protests such as weeing on Josie's toys and such like. So I usually test Pedro and then feed them, Pedro gets 1/2 a tin of Purina DM, his main meal effectively for the evening. Sometimes he settles and sometimes he keeps pestering me for food.

Over the last few days I didn't stick to the 'no food for the last two hours before the PMPS' rule but instead would feed him a tiny amount if he would keep asking for it. Even though 99% of his diet are the low carb calories Purina dm food I wonder if feeding him small amounts as we have is messing with the glucose levels. The other contributing factor is that we occasionally slip towards the later end of our test/feed/shoot schedule and I wonder if this causes an overlap in the insulin, although with the variable dosage we of course don't overdose him since the dose is determined by the BG levels. Are the low numbers though causing a reaction from the liver contributing to the high evening figures...?

Maybe questions. Useful to write this out as it helps me see the issue, especially around the shifted schedule, really must get a handle on this and the food also!

We're back in London Tuesday, pick up on Friday. Curious to see what Ruth thinks.
Lots of love,
Mue & Pedro x
 

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Just realised the U.S. sheet would probably make more sense to you and also just to proof that it's not that easy Pedro scored a whooping 30.2 mmol/l (544) this morning. Couldn't see any food lying around but I suspect he ate something he wasn't supposed to. :/

Mue x
 

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Naughty kitties and their protests! Have you ever tried cooking a chicken breast and using small cubes of that as a treat? It's a no carb treat you could feed at the end of the cycle to try to tide him over until his shot time meal. With a sliding scale, you wouldn't want to artificially inflate his numbers before preshot time.

Pedro is rather dramatic isn't he. :rolleyes: I suspect he's bouncing from his lows the day before.
 
Oh, loving the chicken breast treat idea!!! Will do that! And bizarrely his numbers dropped completely! When we came home this afternoon I could see he was low, tested him, very low, so bit of food and retest and retest, he came from 41 to 54 in 15 mins and then 58 a wee while later and 70 just now. Nice low nadir. He isn't begging for food, not pestering me, was sitting content on my lap. Magic!!! ^_^
 
... Pedro scored a whooping 30.2 mmol/l (544) this morning. Couldn't see any food lying around but I suspect he ate something he wasn't supposed to...

Or, he hit a low and his body went into safety mode, releasing stored glucose (glycogen) to get the numbers up for safety. He may stay high for up to 3 days or so if that happened.
 
And bizarrely his numbers dropped completely! When we came home this afternoon I could see he was low, tested him, very low, so bit of food and retest and retest, he came from 41 to 54 in 15 mins and then 58 a wee while later and 70 just now.
3.9 (70) is just above what we consider the "take action" point on an AlphaTrak. I'd keep testing to make sure he stays up. I suspect the 2.0 units is on the high end of what his body can take. You might want to get Ruth's take on his latest numbers. Next time you see a number above 28 (500) at preshot time, consider testing later that cycle. I've seen cats dive down from black starts to green then back up again all in one cycle.
 
Definitely checking in with Ruth tomorrow, we're in London again on Tuesday. Seen him "bouncing" before and it did take a couple days. I wonder if the variable dosage means it can settle the potential "bouncing" quicker.

Pedro came up to 9.3 (163) PMPS and an hour later just now he was 12.8 (230). I stuck to the two hours of no food before the PMPS and also fed smaller portions in the boosting him a bit off the nadir period. What struck me most was how different he was to previous low numbers, ie less anxious, desperate, frantic begging/searching for food, he was fairly calm. Not sure if that's down to having learned that I will respond by giving him the attention he needs (testing and feeding) or if he is handling the low glucose better.

At the trial they hook him up to a constant monitor, so Tuesday, Wednesday and Thursday they will get some useful insight into this before I pick him up again on Friday. ^_^

He also feels heavier, I'm sure he gained weight. Must get some baby scales...
Mue x
 

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