TBH I would go with what the chemo nurses recommend. I had not realised you had already had an op as mine is for after chemo.
If you do have a good selection of veins on the hand they can use ask how they plan to use the veins so you avoid using the same one twice in row if at all possible.
Given you have reacted to micropore pre chemo for all that is good let the staff on the chemo ward and blood tests know. ȚHey really do all they can to make this as bearable as possible and setting off an allergic skin reaction to sticky stuff on dressings is not on their list of things to do. I am pretty sure the dressing used to keep cannulas in place is hyper allergenic unlike the ones that hold PICCs. My nurses make use of the edges of the cannula dressing to hold the connecting tube they use in place. So far my skin has not rebelled at that. it did to micropore, very seriously to the mat used over the pillow for chemo, and my skin does not like the sanitising wipe residue used to clean the chemo chairs. Take something to throw over the chair and a cotton pillowcase for the mat. Hope that helps head off some of the problems I have had as I would not wish them on anyone.
BTW if you do find your skin gets very reactive speak with the oncologist. mine has sorted out daily antihistamines and an additional course of prednisolone on top of the normal post chemo steroids as well as extra emoillents and soap substitute. that has helped. I can recommend Excema Clothing (previously called Cotton Comfort.) they are the only ones I know who make seam free cotton knickers etc that is 100% organic cotton, latex free and has elastine free underwear options.
This is the organic cotton lined chemo sun hat designed in Japan that I mentioned. Mine arrived this morning and yes it covers all your head and is comfy to wear and protects your face. can be purchased on Etsy and eBay. the Japanese brand of chemo headwear is I think Charm. https://www.etsy.com/uk/listing/726515667/sun-hat-eco-friendly-hat-womens-sunhat?gpla=1&gao=1&&utm_source=google&utm_medium=cpc&utm_campaign=shopping_uk_en_gb_b-accessories&utm_custom1=_k_EAIaIQobChMIjKKjpaSJlAMVf5VQBh1qoDqTEAQYBSABEgLCIPD_BwE_k_&utm_content=go_21811974222_169452879536_717564633596_pla-294930372950_c__726515667engb_102858184&utm_custom2=21811974222&gad_source=1&gad_campaignid=21811974222&gbraid=0AAAAADutTMex6Q1C_pwvOmWJyVyubgLjg&gclid=EAIaIQobChMIjKKjpaSJlAMVf5VQBh1qoDqTEAQYBSABEgLCIPD_BwE