Newborn infants need intramuscular injections of Vitamin K in order to produce critical clotting factors. If they don’t get it they can have potentially life threatening bleeding.






PEMBlog ([ Ссылка ])






@PEMTweets on… sigh “X” (Twitter) ([ Ссылка ])






My Instagram ([ Ссылка ])






My Mastodon account @bradsobo ([ Ссылка ])




References







• American Academy of Pediatrics, Committee on Fetus and Newborn.  Controversies Concerning Vitamin K and the Newborn.  Pediatrics 2003 July; 112(1):191-2. ([ Ссылка ])





• Ross, JA, Davies SM. Vitamin K prophylaxis and childhood cancer. Med Pediatr Oncol. 2000 Jun;34(6):434-7.





• Cornelissen, M., et al.  Prevention of vitamin K deficiency bleeding: efficacy of different multiple oral dose schedules of vitamin K.  Eur J Pediatr.  1997 Feb; 156(2):126-30.





• Greer, FR, et al. Improving the vitamin K status of breastfeeding infants with maternal vitamin K supplements. Pediatr. 1997 Jan;99(1).





• Kher P, Verma RP. Hemorrhagic Disease of Newborn. [Updated 2023 Jun 26]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: [ Ссылка ]#





Transcript






Note: This transcript was partially completed with the use of the Descript AI






Welcome to PEM Currents, the pediatric emergency medicine podcast. As always, I’m your host, Brad Sobolewski. Today, we’re gonna talk about vitamin k deficient bleeding, also known as hemorrhagic disease of the newborn. This is a bleeding disorder that manifests in the first few days to weeks of life after delivery. Under the umbrella are a whole range of hemorrhagic diseases, but the most important is vitamin k deficient bleeding.






I’ll get into why in a moment. Vitamin k itself is a fat soluble vitamin mainly synthesized by gut bacteria. Newborns have minimal vitamin k reserves in a sterile gut. And there’s insufficient placental transfer and breast milk is deficient in vitamin K, so that’s why infants need vitamin K at birth. Without it, they can’t produce clotting factors 2, 7, 9, and 10.






You need all those. In brand newborns, the levels are about 20 percent or less of adult values, but within a month after birth, they arise to within normal limits. Other causes of hemorrhagic disease of the newborn include hereditary clotting factor deficiencies such as hemophilia A or B. And the most common item on the differential, especially for late onset, which we’ll talk about in a moment, is trauma, non accidental or accidental trauma. So why am I covering this topic?






Well, a lot of people out there are actually refusing vitamin k for their newborns. Why? Well, families state that they have concerns about the preservative in the injection, maybe that it could cause autism. It doesn’t. The pain from the injection could be harmful to the infant.






They perceive that the intramuscular vitamin k is a vaccine. It’s not. The dose of intramuscular vitamin K is too high. It isn’t. A potential for adverse reactions to an injection like anaphylaxis.






Anaphylaxis can happen after IV infusion and it’s been rarely reported after I’m injection, like winning the Powerball odds. The injection is perhaps a potential entry for germs, that the intramuscular vitamin K causes cancer. So there was 1 study published in the British Medical Journal in 1990. It raised that concern, suggesting that the risk of cancer was doubled in babies that receive vitamin K after birth. Many studies since then in Europe and the United States have refuted this claim and there is absolutely no association between vitamin k and cancer.






Other concerns about vitamin K include that vitamin K may overwhelm the newborn’s immune system. There’s just a general desire to be natural and perhaps a belief that oral vitamin k prenatally to the mother is more effective, but it isn’t. Furthermore, parents who refuse IM vitamin k tend to refuse other preventative measures, including the Hep B vaccine at birth, prophylaxis against gonococcal ophthalmia, which is really bad, and subsequent routine vaccination. Approximately 1 half of the severe cases of vitamin k deficient bleeding are associated with parental refusal vitamin k during the birth and hospitalization. So hemorrhagic disease of the newborn vitamin k deficient bleeding can be categorized into 3 groups based on the age of onset.






Early occurs within the first 24 hours after birth and it’s generally due to maternal medicines that block vitamin k action. Uh, most commonly, these are anti epileptics like phenytoin, phenobarbital, carbamazepine or primidone. They could also be anticoagulants, coumadin, aspirin or...

свернуть