Surgical Presentation of Newborn Flashcards

1
Q

what are the most common surgical problems in a neonate?

A
meconium ileus 
malrotation 
jejunal atresia 
inguinal hernia 
necrotising enterocolitis
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2
Q

why do newborn babies get sick?

A

premature babies or babies born with congenital problem

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3
Q

how can prematurity cause problems in the bowel?

A

bowel wall not sturdy enough to be used at preterm age - often perforates and releases gas

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4
Q

how can a bowel perforation due to prematurity be identified on a neonatal abdominal xray?

A

outlined liver (due to gas around it)

bubbles of gas in pelvis (bowel herniation)

portal gas in biliary tree

tree track bowel wall = gas on both sides

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5
Q

what condition in neonates is characterised by perforation on xray?

A

necrotising enterocolitis

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6
Q

how are babies with necrotising enterocolitis fed?

A
special feeds (mother's milk is best)
can use NG or IV feeds
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7
Q

how does an obstruction in newborns occur and how is it identified?

A

due to congenital abnormality

problem with feeding normally identified

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8
Q

where can a blockage occur in neonates?

A

in the lumen
in wall of bowel
outside of bowel

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9
Q

a baby is keen to feed, yet by 48 hours shows signs of bilious vomiting and is bringing their feed back up
they have yet to pass their first bowel movement and their bowel is distended
what is most likely diagnosis?

A

meconium ileus (intralumenal cause)

*if not yet passed first bowel movement, then it may be stuck in ileum

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10
Q

what investigations should be considered if there is suspicion of meconium ileus?

A

fluoroscopy (contrast used with xray)

lower GI contrast given - inserted upwards via rectum

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11
Q

what can be seen on fluoroscopy in meconium ileus?

A

large bowel (colon) may appear small as it has never been filled

large dilated bowel loops

some small contracted bowel

patchy appearance of ileum

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12
Q

how is a baby’s tummy described on examination if they have meconium ileus?

A

“doughy” on palpation due to distension

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13
Q

what condition is meconium ileus commonly associated with?

A

cystic fibrosis (due to increased secretions)

*1/3 of babies will present with this and not respiratory problems

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14
Q

how can a fluoroscopy be useful in meconium ileus?

A

contrast fluid can be useful in lubricating bowel to allow meconium to move

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15
Q

what treatment is used for meconium ileus if fluoroscopy is NOT successful at moving the meconium?

A

surgery

temporary stoma

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16
Q

name another intralumenal cause of obstruction?

A

constipation

17
Q

what causes of obstruction are found in the bowel wall?

A

atresia (usually in small bowel) - a congenital dead end

18
Q

how does bowel atresia present after birth?

A

6 hours after birth a baby starts vomiting green

full abdomen and no bowel movements passed

19
Q

how does bowel atresia usually appear on x-ray?

A

distended bowel

not many loops of bowel as obstruction is normally high (hence why vomiting starts after 6 hours or so)

20
Q

why would fluoroscopy be useful in investigating for atresia?

A

checks for meconium in parts of bowel

21
Q

how is bowel atresia treated?

A

2 dead ends joined together

22
Q

give an example of a condition that could cause bowel obstruction from outside of the wall?

A

hernia (compresses bowel as squeezed into tighter space)

malrotation (twisting of bowel on mesentery)

23
Q

how many an inguinal hernia be identified?

A

swelling in inguinal area

asymmetrical groin creases

24
Q

how can a bowel herniation be identified on xray?

A

gas in wrong place (eg in pelvis)

laddering of loops may be seen on top of each other

25
Q

what part of herniation can cause bowel ischaemia?

A

tight pressure in scrotum with testes

- as the have descended in inguinal canal

26
Q

xrays are not required for a diagnosis of a hernia - true or false?

A

true

27
Q

when do children with malrotation usually present?

A

within 1st month (but can be older)

28
Q

how is malrotation usually investigated?

A

upper GI contrast study (fluoroscopy)

29
Q

how does malrotation appear on x-ray?

A

stomach distended

duodenal-jejunal flexure is low and medial (rather than high and lateral behind stomach)

  • usually ileo-caecum -> DJ flexure is largest diameter in abdomen
  • decreasing this diameter allows the mesentery to twist upon itself and cut off blood supply
30
Q

what blood vessel is compromised if the mesentery twists on itself during a case of malrotation?

A

super mesenteric artery (SMA)

31
Q

how is malrotation surgically treated?

A

division of Ladd’s bands (fibrous stalks of peritoneal tissue that attach caecum to the retroperitoneum)

32
Q

what diagnosis should be excluded first in sick newborn?

A

malrotation (as bowel may become ischaemic and baby wont survive)