April 15
It was an early start today as we made our way to the ward at six o'clock so that we could give William cuddles and a wash before theatre today. He was scheduled to be in theatre at 8am but happily for us did not leave until 8:10am (ten extra minutes of cuddles!).
We followed him around to theatres and were asked at the door if we would like to give him a kiss goodbye before he went off. We felt incredibly emotional but in a strange way, things were so totally out of our control until he came back from theatre.
William's operation is described as a Damus-Kaye-Stansel procedure, a Sano shunt and an atrial septectomy.
The DKS procedure (or Stansel as it seems to be known) involves dividing the main pulmonary artery before it splits into the left and right pulmonary trunks and then connecting it to the aorta so that outflow from the right ventricle through the pulmonary valve goes directly into the systemic circulation. It also flows back down to the towards the aortic valve and perfuses the coronary circulation. The Sano shunt is a 4mm gortex tube which goes directly from the right ventricle into the pulmonary circulation thus creating two outflows from the ventricle. The atrial septum is removed so that the inflow from both the systemic and pulmonary circulation mixes and flows into the right ventricle.
In about four months time the shunt will be removed and the upper body venous circulation will be fed directly into the lungs. At age of about three the lower body venous circulation is connected directly to the pulmonary circulation.
We left the hospital to make our way back to Ronald McDonald House and catch up with the kids. Marea stayed the night and mum and dad came over in the morning. We played with the kids and sat down to lunch just after midday when our page from the paediatric intensive care unit (PICU) started beeping. This was our cue to make our way up to PICU and wait for William. When we got there they told us that he was due out of theatre in half an hour and that Professor Chard would be coming to speak to us soon. We waited for a while and before too long he came out and told us that the operation seemed to go pretty much to plan. William was off bypass and maintaining his own circulation without excessive ventilation or inotrope support. We were told that we could see him shortly. From there we waited almost an hour and a half until the surgeon came out again to let us know about the problems that we had been warned of. William's heart function had dropped. He was not able to maintain his circulation. This was possibly due to the non functioning left ventricle acting as a splint. He was going to have to have his chest reopened, or rather re-explored as they had not completely closed it. Professor Chard explained that he may need ecmo (essentially a pump that takes blood from the venous return or atrium and pumps it into the aorta, adding oxygen on the way) We were able to go in and have a quick look and stroke his head before dragging ourselves back to the PICU waiting room again. The wait was long but the news was worth it. When his chest was reopened a significant pericardial collection was around the heart causing some tamponade (or compression preventing the heart from functioning properly. When this was removed the cardiac function picked up immediately and they really felt that no further operative management was required. This was great news as ecmo adds another significant risk factor to the mix.
We still marvel at the skills required for this surgery. William's heart is smaller than a walnut and such delicate repairs seem the stuff of fantasy. Seeing him was no dream though. He had a peripheral line in each foot, an arterial line in one wrist, a double lumen umbilical catheter, a triple lumen central line, a mediastinal chest drain, a peritoneal drain/dialysis tube and two pleural drains, pacing wires, a urinary catheter an anal temperature probe, a nasogastric tube and of course the endotracheal tube for ventilation. His chest was still open with a a thin covering obscuring the view of the organs but not hiding the pulsation of his little heart. We sat with him for a while and returned again after dinner to wait and watch him – fortunately it was not overly exciting. We have a long way to go though.