Vacuum extraction injuries

How does this happen?

A cup is placed on the baby's head, ideally over a specific point that encourages the head to flex and pass through the pelvis most easily. Suction is applied, and the doctor pulls during contractions while the mother pushes.

Two mechanisms produce injury.

Suction on the scalp. The cup pulls the scalp away from the skull. Small vessels running between the scalp layers can tear. If they bleed into the layer just under the scalp, which is not bounded by bone, the blood can spread across the entire head. That is subgaleal hemorrhage bleeding. ²

Traction on the head. Pulling transmits force to the skull, to the brain inside it, and to the neck. That can cause cephalohematoma, skull fracture, bleeding inside the skull, and, rarely, injury to the neck or spinal cord.

The reason the subgaleal space matters is simple arithmetic. It has no bony boundary and it can hold a large volume relative to a newborn's total blood volume. A baby can bleed into their own scalp until they go into shock, and it can happen over a few hours. ²

Guidance addresses the number of attempts, the duration of application, cup detachments, and when to abandon the procedure, precisely because these variables relate to risk. ¹

What causes it?

Two different questions get mixed together here. The first is what leads to this injury in the body. The second is whether anyone could have prevented it. They are not the same question, and the answer to the first does not settle the second.

Happens even with perfect care

• A vacuum delivery that was genuinely indicated, where the baby needed to be born quickly and the alternative carried greater risk. ¹
• A difficult delivery where the head was in a difficult position.
• A large baby, whose weight could not be accurately predicted. ⁴
• A prolonged second stage. ⁵
• caput succedaneum and cephalohematoma, which occur after ordinary births as well.
• Clotting differences in the baby, which increase bleeding risk regardless of technique.

Associated with gaps in care

These are situations where published standards say what the care team should watch for and do. A gap here does not prove anyone caused your child's injury. It points to where the medical records will have an answer.

• Prerequisites not met, including position of the head, adequate anesthesia, an empty bladder, and consent, all of which guidance sets out. ¹
• Prolonged application or repeated attempts, or continuing after the cup has detached repeatedly. Guidance addresses duration, number of pulls and detachments. ¹
• Continuing when there is no descent with pulls, rather than abandoning the procedure. ¹
• Sequential use of vacuum and forceps, which is associated with higher risk. ¹
• Cup placed incorrectly, away from the recommended point.
• The baby not observed afterward. Close observation of the head, heart rate, color and blood count in the hours after a vacuum birth is what catches subgaleal bleeding in time. ²
• Head circumference not measured serially.
• A boggy or growing scalp swelling not recognized as an emergency. ²
• bilirubin not followed where there was significant bruising or a collection. ⁶

Whether any of this amounts to a departure from the standard of care takes a physician expert reading the whole record. Vacuum is used because it prevents harm, and injuries occur after correctly performed deliveries.

What are the signs, by age?

Signs change as a child grows. A newborn cannot show you a walking problem. Some children look fine at first and show differences months later.

At birth and the first hours

• A swelling shaped like the cup, called a chignon. Expected, not dangerous, resolves over days.
• Bruising, abrasion or a blister where the cup sat.
• Emergency signs: a boggy swelling that crosses the suture lines and moves when the head is turned, a rising heart rate, pallor, poor tone. ²
• Low Apgar score scores if the delivery was difficult. ⁷

The first week

• cephalohematoma appearing over hours as a firm swelling bounded by suture lines.
• jaundice as collected blood breaks down. ⁶
• Seizures if there was bleeding inside the skull or a period of low oxygen. ⁸
• Feeding difficulty in a baby who is unwell.
• Scalp wound infection, which is uncommon.

Around 3 months

• Most swellings resolved.
• A firm rim from a resolving cephalohematoma.
• Developmental follow-up where there was bleeding or a period of low oxygen. ⁹

Around 6 months

• Usually nothing.
• Where there was brain injury, delay may appear. ¹⁰

Around 12 months

• No expected effects from an uncomplicated vacuum birth.
• Where there was brain injury, the picture follows that injury.

Toddler years

• No expected effects in the great majority.

School age

• No expected effects in the great majority.

How is it diagnosed?

The immediate question after a vacuum birth is whether any scalp swelling is dangerous.

Serial head circumference measurement, which is the simplest and most useful monitoring. A head that is growing is a head that is filling with blood. ²

Examination of the swelling. Does it cross suture lines? Is it boggy or firm? Does it shift when the head is moved? Is it growing?

Heart rate, color and blood count. A rising heart rate and a falling blood count in a baby with head swelling is the picture of concealed blood loss.

Imaging where there is concern about skull fracture or bleeding inside the skull. CT scan is fast and shows both. cranial ultrasound is poor at the brain surface. ²

bilirubin monitoring where there is significant bruising or a collection. ⁶

What the operative note should record

Ask for it and read it. It should say the indication, the position and station of the head, the type of cup, the time of application, the number of pulls, the number of detachments, the total duration, and whether any other instrument was used. ¹

What is the treatment?

For a chignon or caput succedaneum: nothing. Resolves over days. ²

For a cephalohematoma: no drainage. Monitor bilirubin. ⁶

For subgaleal hemorrhage bleeding: treat as blood loss. Volume replacement, transfusion, correcting clotting problems, intensive monitoring. The key variable is how quickly it is recognized. ²

For a skull fracture: usually observation. Surgical elevation for some depressed fractures.

For bleeding inside the skull: observation for small bleeds, surgical drainage for large ones, seizure treatment as needed. ⁸

For scalp wounds: wound care, and antibiotics where there is infection.

Where there was a period of low oxygen: assessment for hypoxic-ischemic encephalopathy, including whether cooling criteria are met within six hours. ¹¹

What is the long-term outlook?

The great majority of babies born by vacuum extraction have no lasting effects. A chignon and some bruising are the usual findings and both resolve. ²

Where subgaleal hemorrhage bleeding occurs and is recognized and treated promptly, the outcome can be excellent. The harm comes from the shock and the period of poor blood flow, not from the blood in the scalp itself.

Where there was bleeding inside the skull or a period of low oxygen, the outlook follows that injury.

The variable that matters most in this whole condition is time to recognition, which is why the observation period after a vacuum birth exists.

What does daily life look like?

For most families, nothing changes. The chignon flattens and the bruise fades.

For families whose baby had subgaleal bleeding, the first hours are often traumatic and the memory persists. That is worth taking seriously. ¹² See the parent's own health guide.

Where there was brain injury, daily life follows that injury.

What does care cost over a lifetime?

For an uncomplicated vacuum birth, no additional cost.

For subgaleal hemorrhage bleeding treated successfully, the cost of intensive care.

Where there is lasting brain injury, the published anchor for cerebral palsy is CDC's estimate of about $921,000 in 2003 dollars. ¹³ See the cost of care estimator.

What can you do this week?

1. In the first 24 hours, ask whether head circumference is being measured serially and what the numbers are.
2. Ask whether any swelling crosses the suture lines.
3. Ask for the operative note, with the number of pulls, detachments and total duration.
4. Ask whether both vacuum and forceps were used.
5. Ask whether bilirubin is being followed.
6. Ask what the indication for the assisted delivery was.
7. Request the complete records with the records request builder.

What should you ask each specialist?

Take these with you. Write the answers down in the moment, because you will not remember them later.

For the neonatologist

• Does the swelling cross the suture lines, and is it growing?
• What are the serial head circumference measurements?
• What has the blood count done?
• Is bilirubin being followed?
• Has imaging been done, and what did it show?

For the obstetric team

• What was the indication for the vacuum?
• How many pulls, and did the cup detach? How many times?
• How long was the total application time?
• Was any other instrument used before or after?
• Is all of that in the operative note?

You can also build a printable list with the question generator.