Vaccine technique can be a rare cause of clots
https://translate.google.com/translate?sl=da&tl=en&u=https://nyheder.tv2.dk/samfund/2021-03-22-ssi-anbefaler-ny-vaccineteknik-efter-sjaeldne-blodpropper
State Serum Institute of Denmark, now recommends injection aspiration before injecting vaccine
This is a change in the recommendations
Based on a precautionary principle
Normally deltoid muscle does not have major vessels
Aspiration prolongs injection time so may be more painful
There is suspicion as to whether accidental injection of the vaccine into a blood vessel could play a role
No knowledge or data to support this suspicion
New recommendation only applies to covid vaccine
Intravascular administration may lead to a systemic inflammatory reaction leading to blood clots
Danish nursing council
Covid-19 vaccines should be given with aspiration before injection
https://sqd34kucpgoufz3qiuiswlotka–dsr-dk.translate.goog/politik-og-nyheder/nyhed/covid-19-vacciner-skal-gives-med-aspiration-foer-injektion
Aspiration is recommended for all approved covid-19 vaccines
Consistent with the Danish Health and Medicines Authority’s guidelines
Vaccination personnel should ensure that they are injected correctly into a muscle and not into the bloodstream
Possible connection between the AstraZeneca vaccine and rare but serious side effects with blood clots and bleeding
And the link to the updated instructions from the Danish Serum Institute
https://www.ssi.dk/vaccinationer/injektionsteknik/intramuskulaer-injektion-beorn-og-voksne
Google Translate:
https://translate.google.com/translate?sl=da&tl=en&u=https://www.ssi.dk/vaccinationer/injektionsteknik/intramuskulaer-injektion-beorn-og-voksne
Danish Nurse association
https://dsr.dk/politik-og-nyheder/nyhed/covid-19-vacciner-skal-gives-med-aspiration-foer-injektion
Google Translate:
https://translate.google.com/translate?sl=da&tl=en&u=https://dsr.dk/politik-og-nyheder/nyhed/covid-19-vacciner-skal-gives-med-aspiration-foer-injektion
Danish doctor complains about the way the vaccinations are being given which he thinks is incorrect, because aspiration is not being done
https://sundhedspolitisktidsskrift.dk/nyheder/4614-myndighed-sadler-om-aendrer-anbefaling-om-vaccineteknik-efter-meldinger-om-farlige-bivirkninger.html
Google Translate:
https://translate.google.com/translate?hl=&sl=da&tl=en&u=https%3A%2F%2Fsundhedspolitisktidsskrift.dk%2Fnyheder%2F4614-myndighed-sadler-om-aendrer-anbefaling-om-vaccineteknik-efter-meldinger-om-farlige-bivirkninger.html
When vaccinating, it is important to make sure that the vaccine does not go directly into the bloodstream.
The plunger should be pulled back slightly, if blood comes in find a new place
UK and WHO guidelines
https://www.gov.uk/government/collections/immunisation-against-infectious-disease-the-green-book
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/147915/Green-Book-Chapter-4.pdf
Vaccines should not be given intravenously.
It is not necessary to aspirate the syringe after the needle is introduced into the muscle (WHO, 2004; Plotkin and Orenstein, 2004).
Plotkin SA and Orenstein WA (eds) (2008) Vaccines, 5th edition. Philadelphia: WB Saunders Company.
World Health Organization (2004) Immunization in practice: a guide for health workers. WHO.
https://apps.who.int/iris/bitstream/handle/10665/193412/9789241549097_eng.pdf?sequence=1&isAllowed=y
Source