Chapter 28: Hemorrhagic Disorders

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You know, usually when you're driving your car and a warning light pops up on the dashboard, you have a little bit of time to figure it out.

You can pull over, grab the manual out of the control troubleshooting process.

You've got a buffer.

Right, a buffer.

But when you step into the world of obstetrics and that warning light is vaginal bleeding during pregnancy,

there is no pulling over to read the manual.

That light is like a flashing red siren.

Absolutely.

You need to know exactly what is happening under the hood right in that exact moment.

Because it's a, well, it's a massive deal.

Today on The Deep Dive, we are your personal to the chaos of obstetric hemorrhage.

Consider this like a one -on -one tutoring session to help you completely master Chapter 28 hemorrhagic disorders.

We're going to track the timeline of bleeding complications chronologically right through a pregnancy.

So we'll link the foundational physiology to your clinical reasoning and then connect that directly into prioritized nursing care.

Yeah.

And before we map out that timeline, we really need to establish the golden rule here, the foundational clinical context for this whole deep dive.

Right, the golden rule.

Bleeding in pregnancy is always a medical emergency.

Every single time, it directly jeopardizes two lives at once.

Right, because it decreases the maternal oxygen carrying capacity, right?

Exactly.

Placing the mother at severe risk for hypovolemia and shock.

And at the exact same time, it directly threatens oxygen delivery to the fetus, which risks fetal hypoxia and preterm birth.

Wow.

Okay.

And before you even reach for a blood pressure cuff or, you know, the spike a bag of IV fluids, there's this really crucial psychosocial anchor we have to talk about.

Oh, absolutely.

The emotional side of this is huge.

Yeah.

A bleeding pregnant patient is terrified.

I mean, she's sitting there actively bleeding, completely scared for her own life and her fetus' life.

So before you jump into clinical tasks, nursing care has to begin with emotional support.

Which means explaining every single procedure clearly so she isn't in the dark.

Exactly.

Making sure her support person is present and offering pastoral care if she wants it like a hospital chaplain.

You really have to treat the panic while you treat the physical patient.

Because the physical interventions, they really only work if we've established that trust.

We can't treat her like a broken machine, you know?

Totally.

So let's look at the roadmap for today.

We'll start early in the timeline with first trimester bleeding, like miscarriage and cervical issues.

Then we'll look at atopic and molar pregnancies.

Right.

When things implant in the wrong place or the genetics are wrong.

Yep.

Then we move past the 20 -week mark to tackle the major placental emergencies.

And finally, we'll break down this terrifying physiological paradox, DIC.

The clotting crisis.

Yeah, that's a big one.

Let's start with the first 20 weeks.

We're talking about pregnancies that fail within the uterus.

Miscarriage or spontaneous abortion?

Clinically, a miscarriage is defined as a pregnancy loss before 20 weeks of gestation, or if the fetal weight is less than 500 grams.

The timing is a huge clue for you here.

Right, because don't most of them happen pretty early?

Yeah, over 80 % happen before 12 weeks.

And the most common cause is chromosomal abnormalities.

It's really nature's way of ending a pregnancy that just wasn't genetically viable.

Got it.

To really visualize the clinical assessment of a miscarriage, I like to think of the uterus as a room, the cervix as the door, and the pregnancy tissue, the products of conception, as the cargo inside.

Oh, I love that analogy.

It perfectly maps to how a nurse assesses the physical symptoms based on that chart.

So let's walk through the stages.

First, you have a threatened miscarriage.

The door, the cervix is closed, the cargo is still inside the room.

The patient is just experiencing like mild cramping and slight spotting.

And it's super common to see bed rest ordered for a threatened miscarriage.

But it's important to know that bed rest hasn't actually been proven to be effective in preventing the loss at this stage.

Wait, really?

So it's just kind of what for peace of mind?

Exactly.

It's often prescribed more for peace of mind than actual physiological prevention.

Wow, good to know.

Okay, then things progress to an inevitable miscarriage.

Now the door is open, the cervix is dilated, the patient has moderate bleeding, stronger cramping.

The cargo hasn't left the room yet, but it's coming.

Right, which leads directly to an incomplete miscarriage.

The door is still open, but now the bleeding is heavy, like profuse, with severe cramping.

And the cargo is stuck right in the doorway, wedged in the cervix.

And this specific stage is super critical.

The uterus is trying to clamp down to stop the bleeding, but it physically can't contract fully while that tissue is wedged in the opening.

That is exactly why the bleeding is so profuse.

Ah, that makes total sense.

Which brings us to a complete miscarriage.

The cargo has fully passed out of the room, the uterus can finally clamp down, the door closes again, and there's only slight bleeding.

Yep.

And finally, there's the missed miscarriage.

The door is closed, no bleeding, no cramping, but the fetus has died inside the room and just hasn't been expelled.

So your assessment of the cervix is the door open or closed, plus the bleeding volume tells you exactly what stage you're in.

Exactly.

And for management, if the tissue doesn't pass on its own, we use medical management.

Usually a prostaglandin, like mesoprostol or cytotech, which forcefully causes contractions to expel the tissue.

Or surgical management, right?

Like a DNC.

Yes.

Dilation and curatage.

The cervix is manually open and the contents are removed by suction.

Okay, so as a nurse doing post -procedure care, you are on super high alert for postpartum hemorrhage.

You have to know your uterotonic meds.

You've got oxytocin or pitotin to stimulate rhythmic contractions in the upper muscle.

Right.

And you might use methylurganavine or methyrgine for a sustained titanic contraction to really squeeze off those bleeding vessels.

Or you bring in the heavy hitter, carboprost, also known as hamabate.

They all work from different angles.

Yeah.

And oh, if the patient is RH negative, they absolutely must get roguem, right?

Absolutely.

You have to prevent her immune system from building antibodies against RH positive blood, which protects any of her future pregnancies.

And the discharge education is just as critical.

You're teaching self -care for healing and infection prevention.

So, pelvic rest for two weeks.

Right.

No tampons, no douching, no intercourse.

And they need to take showers instead of baths, right?

Yeah.

Because sitting in bath water introduces bacteria to a cervix that might still be slightly open.

Plus, a diet rich in iron and protein to replace the lost blood.

Yeah.

Spot on.

Now, spaying in this early pregnancy window, let's look at the cervix itself.

What happens when the door, from your analogy, is just structurally weak?

Cervical insufficiency.

Exactly.

It's a passive, painless dilation of the cervix, usually happening in the second trimester.

And painless is the really terrifying word there.

I mean, she might not feel a single cramp completely unaware that she's dilating.

Right.

Diagnosis requires a transvaginal ultrasound.

We look for a short cervix, less than 25 millimeters,

and we look for funneling or beaking.

Wait, funneling?

What does that look like?

It's where the internal opening of the cervix starts to efface and open up from the inside out.

So, on the scan, it literally looks like a funnel leading down into the vaginal canal.

Okay, but hold on.

If the cervix is opening and gravity is actively pushing the baby down, why wouldn't we just put the patient on strict bed rest, like lay them flat?

That seems like a most obvious mechanical fix.

I know, it seems entirely logical, but this is a major shift in evidence -based practice.

The clinical evidence shows that strict bed rest simply does not improve outcomes for cervical insufficiency.

Seriously, no bed rest at all?

None.

In fact, prolonged bed rest causes active harm by drastically increasing her risk for a venous thromboembolism.

Blood pools, and she gets dangerous blood clots.

Wow.

Okay, so if we can't use bed rest to fight gravity, what are the actual interventions?

We use targeted mechanical or hormonal support.

The classic surgical fix is a cervical circlage.

It's like a heavy purse string stitch sewn completely around the cervix to cinch it shut.

Like the McDonald technique, right?

Placed vaginally.

Exactly.

Though it can be abdominal if vaginal circlages have failed before.

For non -surgical support, we use vaginal pessaries, which are silicone devices that lift the weight of the uterus,

and we give supplemental progesterone to relax the uterus.

Okay, so that's the cervix failing or a normal pregnancy miscarrying.

But let's shift gears.

What about when a pregnancy implants in the completely wrong location,

or the genetics are just totally unviable?

We're talking ectopic and molar pregnancies.

Let's start with ectopic.

This is any implantation outside the uterine cavity.

About 70 % of the time, it's in the ampulla, the outer portion of the fallopian tube.

And the symptoms are this classic triad, right?

Yeah.

Abdominal pain, delayed menses, and vaginal spotting.

Yes.

But if that tube stretches as the embryo grows and ruptures, it becomes a massive hemorrhage event.

Blood violently spills into the peritoneal cavity.

Which causes referred shoulder pain.

Because all that internal bleeding irritates the phrenic nerve in the diaphragm, and the brain misinterprets it as shoulder pain.

You also look for Cullen's sign, the blue bruising around the umbilicus.

Exactly.

To catch it before it ruptures, we rely on the discriminatory zone for beta HCG levels.

It's a vital threshold.

When beta HCG is between 1500 and 2000, there's enough hormone that we should absolutely see a normal pregnancy on an ultrasound.

So if levels are that high, but the uterus is totally empty on the scan?

It's highly likely that pregnancy is hiding somewhere else, like the tube.

Also, a very low progesterone level, less than 6, is a major red flag.

Okay, so if we catch it early, tube is unruptured, we use medical management.

The gold standard is methotrexate.

It's a folic acid antagonist.

Right, and since folic acid is essential for cell division, methotrexate selectively destroys those rapidly dividing cells, dissolving the pregnancy.

But as a nurse, handling this drug is serious business.

Yeah, it's a highly hazardous antineoplastic medication.

You have to double glove.

You absolutely do not expel air from the syringe or prime the needle, because you could aerosolize it and inhale it.

The patient education is intense.

You have to teach them that their urine will literally be toxic.

They have to double flush the toilet with the lid down for 72 hours.

Here's a huge clinical alert for the nurse assessing pain patients on methotrexate.

Cannot take anything stronger than acetaminophen.

Right, why is that again?

Because if you give them strong narcotics, you might mask the severe, sharp abdominal pain that screams the fallopian tube is ruptured.

We need them to feel that breakthrough pain, so they rush back to the hospital.

Exactly, spot on.

Okay, so shifting from a wrong location to wrong genetics, the molar pregnancy.

Clinically, a hydatidiform mole.

This is a gestational trophoblastic neoplasia.

Which is essentially a benign tumor caused by totally abnormal fertilization.

And there are two types, right?

A complete mole and a partial mole.

Yes, a complete mole happens when a single sperm fertilizes an empty egg that has no maternal genetic material.

The sperm duplicates, but there's no fetus, no placenta.

It just grows into these rapidly expanding fluid -filled grape -like vesicles.

And a partial mole is when one normal egg is fertilized by two sperms simultaneously.

You get triploidy or quadriploidy.

You might see some highly deformed fetal parts, but the genetic overload means it's never viable.

The clinical manifestations are intense because those vesicles grow so incredibly fast.

The uterus will measure way too large for the gestational date.

And the patient will have

extreme nausea because of the astronomically high HCG levels from all that extra tissue.

Plus, the bleeding is really distinct.

It's dark brown, often described as prune juice.

Yeah, prune juice is the classic textbook description.

But the most glaring red flag here is early onset preeclampsia.

Right, because preeclampsia usually happens late in the third trimester.

Exactly.

If a patient is diagnosed with preeclampsia before 24 weeks, you must suspect a hydatiform mole immediately.

Diagnosis is confirmed by a snowstorm pattern on the ultrasound instead of a fetus.

The treatment is a suction -curatage to remove the tissue.

But the real nursing challenge is the strict one -year follow -up.

They need their beta HCG levels monitored weekly, then monthly, for an entire year.

Because if those levels start rising again, it means residual tissue has mutated into choreocarcinoma, an aggressive cancer.

So they absolutely cannot get pregnant during that year, or the new pregnancy's HCG would mask the cancer's HCG.

They need highly reliable contraception, like oral pills,

but absolutely NOIUDs, right?

Correct.

No IUDs until the HCG is undetectable.

Placing an IUD risks causing trauma or perforation to a uterus that might currently be cancerous and weakened.

Okay, we've covered the structural and genetic issues of early pregnancy.

Let's fast forward.

As the baby grows and we cross the 20 -week mark, the danger shifts heavily to the placenta.

The life support system itself.

Let's look at the two heavy hitters, placenta previa and placental abruption.

Okay, placenta previa.

The placenta implants abnormally low in the uterus.

It establishes itself in the lower uterine segment,

completely or partially blocking the internal cervical opening.

Or it's marginal, just resting right on the edge.

And because it's sitting right over that opening, as the cervix naturally begins to thin and stretch in the third trimester, the placental blood vessels are physically torn.

Which causes the hallmark symptom.

Painless bright red vaginal bleeding.

And if you palpate the abdomen, the uterus feels soft, relaxed and non -tender.

And this presentation dictates the ultimate golden rule of obstetrics.

If a patient presents with painless bright red bleeding, you perform absolutely NO vaginal exams.

Zero.

None.

If you blindly insert your fingers to check for dilation, you will puncture that overlying placenta and trigger immediate catastrophic hemorrhage.

You skip the hands and go straight to the ultrasound probe.

Care depends on stability expectant management.

Like pelvic rest.

If stable.

If the bleeding is severe or they hit 36 weeks, it's an immediate c -section.

But wait.

Previous sets a massive trap for postpartum hemorrhage, right?

It does.

It goes back to anatomy.

The upper part of a normal uterus is packed with thick, interlacing muscle bundles.

The living squeeze shut to clamp off the bleeding vessels.

But a preview is in the lower uterine segment, which is mostly thin connective tissue.

It lacks those heavy muscle bundles.

Exactly.

So even after the baby is out and the top of the uterus is contracting beautifully, that lower segment can just passively bleed out because it can't clamp its own vessel shut.

That is wild.

Contrast that entire picture with placental abruption.

Abruptio placenta.

This is when a normally implanted upper uterine placenta forcefully detaches from the wall prematurely.

And the wrist factors are tied to vascular disruption.

Maternal hypertension is huge because high pressure damages delicate vessels.

Cocaine use causes massive sudden vasoconstriction.

Or blunt trauma like a car crash, which physically shears the placenta off.

And the symptoms are the polar opposite of previa.

Instead of painless, an abruption causes agonizing, unremitting abdominal pain.

The uterus is hypertonic.

It feels rigid like a wooden board.

It completely fails to relax between contractions.

But wait, I need to visualize this.

If the placenta is tearing away from the wall, why is the bleeding dark red?

In a previa, you said it was bright red.

Isn't all fresh bleeding bright red?

Ah, it's about anatomy and time.

In a previa, the bleeding is happening right at the circle opening.

It escapes the body immediately, so it's bright red.

But in an abruption, the placenta detaches high up in the uterus.

The blood gets trapped behind the placenta.

It sits there, it ages, it deoxygenates, and it turns dark red before the pressure finally forces it out of the cervix.

That makes perfect sense.

And if enough blood gets trapped in that uterine muscle under high pressure, it damages the tissue.

The uterus turns bruised and purple, which is known as a cuvular uterus.

And you also have to track how much fetal blood is mixing with the mother's blood.

We use the Klyhauer -Betka test for that.

That's the test that detects fetal red cells in the maternal bloodstream, right?

To calculate the massive dose of Rogum needed for an Rh - mother.

Exactly.

Now, before we move to DIC, we have to touch on umbilical cord variations.

Normally, the delicate vessels are encased in Wharton's jelly, a thick shock absorber.

Right.

But in vasoprevia, the vessels lie completely unprotected over the cervical opening.

You've got filamentous insertion, where vessels branch wildly through thin membranes.

It's a conciliate placenta with extra lobes and protected vessel bridges.

And battledoor, where the cord plugs into the fragile edge.

The common thread is the lack of Wharton's jelly.

Without that protective airbag, if the membranes rupture, those fetal vessels can snap.

The fetus can literally bleed to death inside the womb in minutes.

Terrifying.

Okay, let's talk about the biggest physiological paradox in this entire chapter.

How does a patient experiencing massive hemorrhage, like a severe abruption, suddenly develop a clotting disorder?

It's incredibly counterintuitive.

We're talking about DIC,

disseminated intravascular coagulation.

It's a consumptive coagulopathy.

And it's never a primary disease, right?

Never.

It's always a secondary catastrophic reaction triggered by a massive release of tissue factor, like from an abruption or severe pre -eclampsia.

The body panics.

It senses the extreme trauma and overreacts wildly.

It starts forming microscopic blood clots everywhere throughout the entire vascular system.

Right, instead of localizing the clot to the bleeding site.

And because it's frantically making millions of these tiny, useless microclots all over the body, it completely consumes or uses up all the circulating clotting factors, fibrinogen and platelets.

So the supply's just exhausted.

There's nothing left to stop the actual bleeding at the placental site, resulting in uncontrollable hemorrhage from everywhere.

Your assessment is looking for signs that the blood has entirely lost its ability to coagulate.

You'll see spontaneous nosebleeds.

You'll take their blood pressure.

And when you remove the cuff, there will be petechiae, tiny pinpoint hemorrhages left behind.

You'll literally see blood oozing out of their IV insertion sites.

The lab profile will show drastically decreased platelets and fibrinogen.

The PT and PTT clotting times are significantly prolonged.

And the fibrin demubation products and D -dimer are wildly elevated because the body's trying to break down all those microclots it just mistakenly made.

So the nursing interventions here are a massive effort.

First, cure the underlying cause, usually delivering the baby and placenta immediately to cut off the tissue factor.

While preparing for delivery, you're aggressively providing volume expansion, pushing 5E fluids, transfusing packed red blood cells, giving fresh frozen plasma or cryoprecipitin.

And you physically place the patient in a side -lying tilt, right, to keep the heavy uterus off the vena cava.

Plus oxygen via a non -rebreather mask at 10 liters per minute.

Yes.

And there is a critical clinical alert here regarding the kidneys.

They are exceptionally vulnerable.

All those millions of microclots get physically jammed in the tiny capillary beds of the kidneys causing acute renal failure.

So you must insert a Foley catheter.

It is an absolute priority to monitor urine output and ensure it remains above 30 milliliters per hour.

If it drops below that, the kidneys are Exactly.

Well, we have covered a massive amount of clinical ground today.

Let's quickly synthesize this journey.

We started early, looking at miscarriages and the structural failure of cervical insufficiency.

We explored ectopic tubal ruptures and the genetic anomalies of molar pregnancies.

Then we moved into the third trimester, contrasting the painless bright red bleeding of an improperly placed placenta previa against the agonizing dark red bleeding of a placental abruption.

And finally, we decoded the systemic cascade of DIC where massive trauma triggers a fatal clotting and bleeding crisis.

It's a profound amount of physiology.

But understanding the sequence from anatomy to symptom to intervention really helps ground your clinical reasoning when seconds matter.

Before we go, we want to leave you with a provocative clinical thought to ponder on your own.

During a normal pregnancy, a woman's blood volume naturally increases by up to 40 % to support the fetus.

This hypervolemia acts as an incredible protective shield.

It means she can lose a massive amount of blood before her vital signs even begin to show the classic drops in blood pressure and spikes in heart rate that indicate hypovolemic shock.

Knowing this, how does that hidden physiological reserve change the way you observe and assess a bleeding pregnant patient?

If you rely on blood pressure drops alone, you might be catching the emergency far too late.

Right.

The warning light is the bleeding itself, not just the vital signs.

You can't pull over and read the manual.

You have to recognize the siren immediately and trust your clinical instincts.

Thank you for joining us for this deep dive.

From all of us at the Last Minute Lecture Team, we wish you the absolute best of luck on your studies and your upcoming exams.

You've got this.