Management of Obstetrics and Gynaecology Flashcards
Obstetrics
The branch of medicine concerned with pregnancy, child birth and the post partum period
Terminology
EDD/ EDB – Estimated Date Delivery/ Estimated Date Birth
LMP – Last Menstrual Period
SB – Still Birth
Primigravida – 1st Pregnancy
G/Gravida – pregnancy
P/Para/Parity – number of live births
Gestation – Length of pregnancy in weeks
37 - 42 weeks: Term
24 – 37 weeks: Pre-term
24 weeks or less: Miscarriage
VBAC: Vaginal Birth After C-Section
Meconium – First stool passed by baby
Using the diagram, list and describe the anatomical and physiological changes that occur in the pregnant person
Lady diagram in folder on MT. Some points to include may be:
CVS:
- Increase in cardiac output by 20-30% in first 10 weeks
- Increase in maternal heart rate by 10-15bpm
- Decrease in systolic and diastolic BP of 10-15mmHg due to reduced peripheral resistance caused by increased progesterone levels
- Decrease in cardiac output of up to 40% when patient lying supine due to the weight of the uterus compressing the inferior vena cava
- Increase in blood volume due to haemodilution by around 45% occurs with a small increase in red blood cells. The disproportionate increase in blood plasma compared to red blood cell mass can lead to a ‘physiological anaemia’ from around 27 weeks gestation
- Due to increased blood volume, the pregnant female is more tolerant of severe blood loss at the expense of diverting blood away from the uterus and foetus
Resp:
Increase in rate and effort
Diaphragm flattens and becomes splinted
Increase in oxygen consumption/ requirements
Laryngeal oedema – consider securing airway quickly in pregnant female
GI:
Increased gastric acid (due to delayed emptying of the stomach caused by hormones)
Cardiac sphincter relaxes increasing likelihood of regurgitation/ vomiting
Nausea and vomiting can occur from 4-8 weeks gestation and continue to around 16 weeks. Some severe cases can last for longer and cause severe dehydration resulting in hospital admission (hyperemesis gravidum)
Urinary:
Increased frequency of urination
Other:
Increase in Relaxin hormone which leads to more lax joints – increased risk of strains/ sprains/ dislocations
Increased risk of falls due to changes in centre of gravity
Swelling to joints
Engorged breasts
Hair appears thicker due to decrease in hair loss during pregnancy
Nails appear stronger and less brittle
Possible appearance of stretch marks to skin
Cardiovascular
Increase in cardiac output by 20-30% in first 10 weeks
- Increase in maternal heart rate by 10-15bpm
- Decrease in systolic and diastolic BP of 10-15mmHg due to reduced peripheral resistance caused by increased progesterone levels
- Decrease in cardiac output of up to 40% when patient lying supine due to the weight of the uterus compressing the inferior vena cava
- Increase in blood volume due to haemodilution by around 45% occurs with a small increase in red blood cells. The disproportionate increase in blood plasma compared to red blood cell mass can lead to a ‘physiological anaemia’ from around 27 weeks gestation
- Due to increased blood volume, the pregnant female is more tolerant of severe blood loss at the expense of diverting blood away from the uterus and foetus
Respiratory
Increase in rate and effort
Diaphragm flattens and becomes splinted
Increase in oxygen consumption/ requirements
Laryngeal oedema – consider securing airway quickly in pregnant female
1st Trimester
Starts: 1st day of last period
Ends: 12 weeks 6 days
Most crucial stages of development occur in this time frame
Foetal cells undergo differentiation
Female may not be aware she is pregnant until 4+ weeks
Most abortions occur within the first trimester.
Heart begins to beat around 6-8 weeks gestation and can be seen on ultrasound
Pregnant female may be unaware of pregnancy until missed period
Pregnant female may experience fatigue, nausea, vomiting during this time.
2nd trimester
Starts: 13 weeks
Ends: 25 weeks 6 days
The uterus begins to expand and can be palpated above the pelvic rim
The fundus can be palpated at the umbilicus around 20- 22 weeks gestation
Amniocentesis is usually performed where required between 14-16 weeks
Any nausea and vomiting may be starting to ease
The fetus starts to develop bone structure
Fundal height is a way of measuring babys growth and development.
Amniocentesis is a medical procedure used primarily in prenatal diagnosis of chromosomal abnormalities and fetal infections, as well as for sex determination
Stage 1 Labour
LASTS AROUND 8 - 10 HOURS, BUT IS LONGER IN PRIMIGRAVIDAE
SHOW
REGULAR CONTRACTIONS BECOMING MORE FREQUENT
RUPTURE OF THE MEMBRANES (BREAKING OF THE WATERS )
LONGEST PART OF THE LABOUR
Stage 1 Labour
ABCDE primary survey
Ascertain gestation and review the notes
Assess for ‘bloody show’, ruptured membranes, contractions and/or bleeding
Visual inspection of vaginal entrance if contractions are at 1-2 minute intervals OR there is an urge to push
If contractions within 1-2 mins or urge to push/ crowning/ breech presentation then remain on scene and request midwife. Prepare for birth of baby
Stage 2 Labour – Full dilation of the cervix until birt
RUPTURE OF THE MEMBRANES UNLESS THEY WERE RUPTURED IN FIRST STAGE CHANGES IN CONTRACTIONS MOTHER BEARS DOWN CROWNING POSSIBLE BOWEL MOVEMENT DELIVERY OF BABY
Stage 3 Labour – Birth of the placenta and membranes
LENGTHENING OF CORD
RETURN OF PAINS
URGE TO BEAR DOWN
A SMALL GUSH OF BLOOD ( 200 - 300 mls )
EXPULSION OF THE PLACENTA
THIS SHOULD BE WITHIN 15 MINUTES OF BIRTH OF THE BABY
APH - Miscarriage
Bleeding resulting in the loss of a pregnancy at 24 weeks gestation or less
Most common within the first 12 weeks (commonly 6-14 weeks)
Miscarriage
Risk Factors:
Previous Hx miscarriage
Previously identified potential miscarriage at scan
Smoking
Obesity
Miscarriage
Risk Symptoms
Bleeding: light or heavy, often with clots or tissue
Pain: central, crampy, suprapubic, backache
Pregnancy symptoms subsiding
Signs of cervical shock due to retained tissue in the cervix (hypotension, bradycardia)
Management of Fetal Tissue
Fetal tissue may resemble blood stained tissue or may present as a discernible baby with placenta attached
Discuss the preferences about management of the fetal tissue or ‘her baby’ with the woman
If the tissue is difficult to identify, transport to hospital
Where the baby is noticeably developed and small, wrap the baby within a towel and ask the mother if she wishes to hold the baby during transport
Where the mother does not wish to see or hold the tissue or baby, wrap sensitively and convey to hospital
Document how the fetal tissue/ baby was conveyed and hand over to the midwife or nurse at transfer of care