u/Embarrassed-Voice-24

Image 1 — My son’s 93-day NICU journey, 25+5 weeker with BPD, looking to connect with other parents (eye surgery today)
Image 2 — My son’s 93-day NICU journey, 25+5 weeker with BPD, looking to connect with other parents (eye surgery today)

My son’s 93-day NICU journey, 25+5 weeker with BPD, looking to connect with other parents (eye surgery today)

Our son was born on May 19th at 25 weeks and 5 days, weighing 600 grams, a little over a pound. My wife had preeclampsia that came on fast; two days before he was born we were just out getting a drink together, checked her blood pressure almost on a whim at a pharmacy, and by that night we were being told he might come months early.

He’s 93 days old today, and it’s been… a lot. Today, in fact, he’ll actually be in OR for laser eye surgery shortly, so this post is coming from a waiting room, in a way.

The respiratory journey: He’s been intubated and extubated five times. He developed moderate to severe chronic lung disease (BPD) and has cycled between the ventilator, NAVA, and non-invasive pressure support (NIV) multiple times. He’s had several courses of dexamethasone, plus a hydrocortisone bridge each time to protect his adrenal function, and nebulized budesonide for a while too, though his current hospital doesn’t use inhaled steroids, so that got dropped after transfer. Different centers, different protocols, apparently. As of today, he’s on non-invasive pressure control (NIV PC) at 14/10 pressure, with his FiO2 running mid 20s% (24 to 26%). The team’s been slowly, carefully weaning his pressure, trying to find the minimum support he actually needs without causing bigger swings by pushing too fast.

Other stuff along the way: A couple of weeks ago we transferred him from our original NICU to a hospital closer to where we’re building our life as a family, one of the better parts of this whole thing. He’s had a hernia (with reduction), a hydrocele, and from being intubated so long, some vocal cord movement issues that are being watched. He’s on iron supplementation after five blood transfusions. And this week his ROP (eye disease from prematurity) progressed to Stage 3 with plus disease, so today he’s having laser eye surgery, under light anesthesia, intubated for the procedure, with a real chance he comes back to the unit still on the tube depending on how his airway looks afterward, given his history.

Through all of it, he’s growing. He’s over 2.2kg now, from 600g. He roots around for his soother, recently started tolerating skin-to-skin again after a rough patch, and the nurses keep telling us how much of a fighter he is, which I know every NICU parent probably hears, but it still means something every time.

My wife has been with him almost every single day since birth, she didn’t sleep in her own bed for 90 days. I’ve been going back and forth for work, which has its own kind of hard.

I guess I’m posting because I don’t really know what I’m looking for except, if you’ve been through something like this, especially the extreme prematurity plus BPD plus multiple extubation attempts combo, I’d love to hear how it went for you, what helped, what you wish someone had told you. And if you’re in the middle of it right now like we are, I see you. This community has quietly been a comfort even just lurking, so thought I’d finally share our story.

u/Embarrassed-Voice-24 — 13 hours ago
▲ 3 r/BMET

Critical question about Maxblend2 Low Flow Air/Oxygen Blender — black knob on left side — does it need to be OPEN for accurate FiO2 reading? Conflicting information from Biomed vs RT [NICU parent]

I'm a dad of a 25-week premature baby currently in the NICU on a Bunnell LifePulse JET ventilator with a Maxblend2 Low Flow Air/Oxygen Blender. I work with electronics and machines professionally.

I need expert clarification on this specific observation:
On the Maxblend2 there is a black knob on the far left side of the device.
Here is what I personally observed and what Biomed explained to nurses:

Maxblend2 dial is set to 33%
Screen on the Maxblend2 displays ~42% (significantly higher than dial)
When you OPEN the black knob — pressure comes through and the screen reading drops to ~33% — matching the dial
When the black knob is CLOSED — the screen shows the falsely elevated reading of ~42%

Biomed's explanation to nurses:

The screen only shows the accurate/true FiO2 when the black knob is open. Without opening it the screen shows an inaccurate elevated reading.
Nurses response:

After Biomed explained this they started opening the black knob to verify readings.
Today's RT said:

That is NOT correct. Contradicting what Biomed told the nurses.
My specific questions:

What is the black knob on the far left of the Maxblend2 — what does it specifically control or allow?
Does the Maxblend2 screen show an accurate FiO2 reading when this knob is CLOSED — or does it only show an accurate reading when OPEN?
Is it normal for the screen to show ~42% when the dial is set to 33% with the knob closed?
Should this knob be OPEN or CLOSED during normal patient ventilation?
If nurses/RTs have been making FiO2 adjustments based on the screen reading WITHOUT opening this knob — have they been basing clinical decisions on an inaccurate reading?

Why this is critically important:
During my son's most severe DSAT episodes where his SpO2 dropped to the 40s:

The screen showed high FiO2 values
If those readings were inaccurate (knob closed)
The team may have believed they were delivering more oxygen than they actually were
This could explain why those episodes were so prolonged and severe

There is currently active disagreement between the Biomed team and the RT about correct operation of this device — while it is connected to my son.
I need to understand this correctly before escalating to the medical team today.

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u/Embarrassed-Voice-24 — 2 months ago