May I present the opposing view here? That of a "child patient"? Instead of the view of the "adult patient who has now stepped up to the plate and/or bitten the bullet" or the view of the parent?
This is not based on my own experience, as I do not quite remember how I used to react to the "pricks" when I was a kid below 5 years of age, and parents' views are usually coloured, especially if so much time has passed! This is based on what have I have actually seen with small kids at my centre who have had issues with their veins. There was one instance where I remember it took 9 attempts for a successful connection - the poor kid had cried herself into numbness, the mom was crying, the doctor and the nurse were helpless.
If a child below 5 years has really thin veins and has had previous bad experiences with his/her doctors/nurses, then we should be aware that each transfusion can be quite a traumatic event for the child. Given that this is a chronic issue, we need to understand the child gets genuinely terrified of his/her visit to the transfusion centre, even up to 2 days before the visit. Even if the pain of the actual injection may not be huge (and let me tell you that it can be pretty intense if you have sensitive skin, or the needle cuts through a particularly sensitive area underneath the epidermis), the whole psychological trauma associated with the prick is certainly greater than the actual pain.
Then, let us also understand that nurses and doctors prick the vein, by "touch" - they can not actually see the vein. Despite having good veins, there have been occasions when my nurse has pricked into the vein wall on one side and then out the other side, because of the angle of the vein or some other factor. Not a pretty thing to bear, having that needle tear through a muscle on the other side of the vein.
Then, when the child hyperventilates, the vein "disappears" - the doctors can no longer feel it - how do you expect them to prick the vein then? In the case of one child, I have seen the needle go into the vein, blood come out into the scalp vein set and then have the vein subside, and disappear, leading to a failed prick. And, this is with an very experienced doctor and nurse.
Possible solutions:
1. Increased fluid intake the day before the transfusion and on the day of the transfusion before the actual injection
2. Needles come in various sizes - pls check the gauge of the needle - typical sizes are 19G, 20G, 21G, 22G - (higher the number, smaller the needle dia) - and then shift down on the size of the needle
3. Special needles - these are plastic needles with a thin metal core that is removed post injection. The metal core is used to penetrate the vein, and it is removed once the connection is made. This means that since the metal is not used for transport of blood, it can be of a very thin diameter indeed. And, the plastic needle moves with the vein, so there is no chance of any slippage thereafter. (Thanks to Ashish for educating me on these needles)
4. If the kid can manage it, consider adding a multi-connector tubing to the scalp vein set, and keeping it in place for 2-3 months (saves you that many pricks) - works like a quasi-port, without many of the other issues. However, typically this is best managed if the injection site is on the back of the palm
5. Consider hiring your own phlebetomist, if your centre will allow it - this is their career - drawing blood.
6. Consider a mild sedative, in consultation with your doctor - something like a cough syrup?
The kid should certainly outgrow this phase as his veins grow - but, he has a genuine issue currently. And, it may not be the fault of the doctors/nurses either on this issue, so let us all keep an open mind.
And, Carisma, I did not quite understand your objections to the doctor wanting to do a HLA match search - I thought he was being proactive about the long term treatment of your son - what is your objection?
cheers
Poirot