This is going to be a long post, so please bear with me. You are about to get a lesson in health and science. This first part is a direct quote from http://www.stanfordchildrens.org/en/topic/default?id=patent-ductus-arteriosus-pda-90-P01811.
“What is PDA?
PDA is a heart problem that is frequently noted in the first few weeks or months after birth. It is characterized by the persistence of a normal fetal connection between the aorta and the pulmonary artery which allows oxygen-rich (red) blood that should go to the body to recirculate through the lungs.
All babies are born with this connection between the aorta and the pulmonary artery. While your baby was developing in the uterus, it was not necessary for blood to circulate through the lungs because oxygen was provided through the placenta. During pregnancy, a connection was necessary to allow oxygen-rich (red) blood to bypass your baby's lungs and proceed into the body. This normal connection that all babies have is called a ductus arteriosus.
At birth, the placenta is removed when the umbilical cord is cut. Your baby's lungs must now provide oxygen to his or her body. As your baby takes the first breath, the blood vessels in the lungs open up, and blood begins to flow through them to pick up oxygen. At this point, the ductus arteriosus is not needed to bypass the lungs. Under normal circumstances, within the first few days after birth, the ductus arteriosus closes and blood no longer passes through it.
What causes PDA?
A PDA is almost always present at birth. In some children, the PDA does not close. Although exact reasons why this happens in some patients and not in others are not known, the most common association for a PDA is prematurity.
PDA can also occur in combination with other heart defects.
Why is PDA a concern?
When the ductus arteriosus stays open, oxygen-rich (red) blood passes from the aorta to the pulmonary artery, mixing with the oxygen-poor (blue) blood already flowing to the lungs. The blood vessels in the lungs have to handle a larger amount of blood than normal. How well the lung vessels are able to adapt to the extra blood flow depends on how big the PDA is and how much blood is able to pass through it from the aorta.
Extra blood causes higher pressure in the blood vessels in the lungs. The larger the volume of blood that goes to the lungs at high pressure, the more the lungs have to cope with this extra blood at high pressure.
Children may have difficulty breathing because of this extra blood flow to the lungs at high pressure. They may remain on the ventilator for a longer period of time if they are premature. The support from the ventilator also may be high, due to this extra blood flow to the lungs.
Rarely, untreated PDA may lead to long-term lung damage. This is uncommon, however, since most children will have been treated for their PDA before the lungs get damaged.
Often, the PDA may be "silent," that is, causing no symptoms. This is especially true in older patients (beyond the first few months of life) with small PDAs.”
End of health lesson.
Molly has so far been seen by an endocrinologist (thyroid), pulmonologist (lungs), and a cardiologist (heart). The most interesting visits of these has been from the cardiologist. They did an EKG and an echo of heart. Now, you may or may not remember that during Molly’s stay at Hunt Regional in Greenville, she had a PDA. It naturally closed on its own after awhile. The cardiologist at Children’s discovered that the PDA reopened. Reopening can be caused by stress or infection. Molly has of course experienced both of these. The neonatologist seemed to express that the PDA is not small, so its size must be significant. This could potentially be the reason that Molly has had so much trouble getting off the ventilator. So, before they jump into giving Molly a trach, they want to close the PDA. Monday, she is slated for a procedure called a cardiac catheterization. They will go through an artery in her groin, thread a catheter up into her heart, and simply plug up the PDA. They are going to see how this affects her respiratory situation. They will gauge this based on blood gases and chest x-rays. This could potentially be all she needs to successfully be extubated. I am not sure what time the procedure will be done tomorrow. I have a sinus infection and have not been able to see my baby girl in 3 days. I am starting on antibiotics today, but I don’t know if they will let me in to see her. Not even while wearing a mask. Their philosophy is this....if you need to wear a mask, then you must be sick, so you need to stay away from the NICU. I get that, but I want to see my baby before this happens! Tim will ask today during rounds. We are back to attending rounds every day. It takes them about 2.5 hours to get through all the babies in Molly’s area anyway.
More about Children’s: So far, we have liked everyone taking care of her. There is a team of people for everything. Even a “picc team” that comes to change the dressing on her broviac. The feeling of the NICU is much more clinical and Molly is more of a patient than a little baby. The physical therapist was surprised that we held Molly at Plano and that she sat up in a bumbo seat. I guess they think that she has laid in a bed for the last 5.5 months. My hope is that we won’t be there that long. Whatever Molly needs can hopefully be done quickly and we can move forward on our path to going home.
I have some special prayer requests. Please pray that I get over my sinus infection quickly. Please pray that Molly stays infection-free. Please pray that the heart cath tomorrow is a success and that she is not in any pain and that the PDA can successfully be closed. Please pray that this is the answer to her being successfully extubated and that she won’t need the trach after all. What a blessing this will be! I will try to keep everyone more updated. I have felt like pooh since our transfer.
By the way, Molly is still weighing 10.5 pounds. She is off her fentanyl. Still on breast milk, continuous feeds of 19mL/hr, fortified to 24 cals with neocate. They had to give her some ativan yesterday (sedative). I am sure she could have been soothed by being given some love and being held. But, that was not the case. The nurses and RTs are so very afraid that Molly will pull that breathing tube out, that they keep her arms wrapped up tight. And, they are transitioning to neobars (the bar that holds the tube in place by being glued/taped to her face) from the medical tape. However, they haven’t made the transition just yet. So, Molly has tape on half of her face to hold the ET tube in place. I. Hate. That. Tape! I am sure Molly does too. Like I said, hopefully we won’t be here that long!!!