Miscarriage

spontaneous fetal loss before 24 weeks gestation ND </= 500G

causes

  • 1st trimester
    • chromosomal abnormalities
    • PCOS
    • APS (antiphospholipid syndrome)
    • endocrine disorder (untreated DM or thyroid disease)
    • uterine abnormalities (submucosal fibroid, subseptate uterine, endometrial polyp)
    • infection: TORCHES
  • 2nd trimester
    • Cervical incompetence
    • Asherman syndrome
    • bacterial vaginosis
    • uterine abnormalities (higher in 2nd trimester)
    • thrombophilias
    • infection: TORCHES
    • bactrerial vaginosis

1. threatened miscarriage

  • PV bleed
  • viable fetus
  • os close
  • symptoms of pregnancy
  • uterus correspond to date

mx:

  • ABC
  • remove POC at os
  • put prostin for priming for cervical os 3hours prior to arrange for ERPOC

2. inevitable miscarriage

  • PV bleed (a lot)
  • abdominal pain
  • os open but no POC seen
  • viable fetus
  • uterus correspond to date

3. incomplete miscarriage

  • PV bleed (a lot)
  • abdominal pain
  • os open with POC seen
  • non viable fetus, thick ET, retained POC in uterus
  • uterus smaller than date

4. complete miscarriage

  • PV bleed (gush of blood) with POC
  • abdominal pain
  • os close
  • uterus empty, normal endometrial lining
  • uterus smaller than date

5. missed miscarriage

  • asymptomatic
  • os close
  • non viable fetus
  • uterus smaller than date
  • BhCG may still be produce by placenta

mx:

  1. repeat US after 7-14 days if in doubt.
  2. then arrange for ERPOC.
  3. TCA stat if passed out POC, PV bleeding, fever.
  4. psychological support and counselling.

6. septic miscarriage

  • PV bleeding and discharge
  • abdominal pain
  • history of amniocentesis
  • os open with POC
  • cervical motion tenderness
  • adnexal tenderness
  • uterus smaller than date
  • fetus non viable, thick ET, retained POC in uterus

mx: psychological support and counselling

7. recurrent miscarriage

more or equal to 3 consecutive miscarriage

  • risk factor
    • woman is ≥35 years of age and the man ≥40 years of age
    • smoking and alcohol
    • antiphospholipid syndrome

mx:

  • investigate the cause; DM, thyroid ds, renal ds, SLE
  • rule out uterine/cervical abnormalities
  • cervical cerclage for cervical incompetence
  • Pregnant women with antiphospholipid syndrome should be considered for treatment with low-dose aspirin plus heparin to prevent further miscarriage

resources

RCOG guidelines

Contraceptions

postpartum family planning aims to prevent unintended pregnancy and closely spaced pregnancies after childbirth

Method

  • Long acting reversible contraceptions (fit and forget) – most effective
    • IUD
    • Implant
  • hormonal contraception
    • COCP – combined oral contraceptive pill
    • POCP- progestogen- only contraceptive pill
    • Depo provera injection
  • barrier method
    • condoms – also protect against STI
    • internal condom –
  • emergency contraception
    • emergency contraceptive pill
    • copper IUD – (recommended if weight >70kg)
  • fertility awareness
    • calendar method
  • permanent contraception – most effective
    • vasectomy
    • tubal ligation

Long acting reversible contraceptions

IUD – Intrauterine Device

  • can start within 48 hours/ delayed after 4 weeks postpartum
  • prevent pregnancy for 5-10 years
  • eg; levonorgestrel – releasing IUD (Mirena) – up to 7 years
  • failure rates ; 1 in 1000 (0.001)
  • copper IUD does not interfere breastfeeding
  • return of fertility: immediate
  • side effect;
    • IUD may came out of uterus
    • infection
    • injury
    • hormonal IUD (mirena) cause spotting and irregular bleeding in first 3-6 months of use, headache, nausea, depression, breast tenderness
    • copper IUD increase menstrual pain and bleeding, intermenstrual bleeding. decrease within 1 year of use

Implants

  • release progestin
  • can start anytime
  • prevent pregnancy for 3-5 years
  • failure rates ; 1 in 1000 (0.001)
  • return of fertility: immediate
  • does not interfere breastfeeding
  • side effect;
    • irregular menses, intermenstural bleeding
    • mood changes
    • headache
    • acne
    • depression

Permanent Contraception

Female Sterilisation

  • can start within 7 days / after 6 weeks postpartum
  • failure rates ; 2 in 1000 (0.002)

Vasectomy

  • can start anytime
  • failure rates ; 1 in 1000 (0.001)
  • takes about 2 to 4 months for the semen to become totally free of sperm after a vasectomy. A couple must use another method of birth control or avoid sexual intercourse until a sperm count confirms that no sperm are present.

pros;

  • permanent birth control
  • no daily attention require
  • does not affect sexual pleasure

cons;

  • may regret
  • require surgery
  • may not be reversible

Hormonal contraception-

Progestogen – only injectable contraceptives (Depoprovera)

  • prevent pregnancy for 8-12 weeks ( 3 months )
  • can start anytime
  • failure rates ; 3 in 100 (0.03)
  • side effects: amenorrhea
  • return of fertility: months
  • does not interfere breastfeeding
  • side effect;
    • bone loss
    • irregular menses
    • headache
    • slight weight gain

Progestogen – only pills (POP)

  • contained progestin
  • taken continuously every day without a break
  • can start anytime
  • failure rates; 9 in 100 (0.09)
  • does not interfere breastfeeding
  • must be taken at the exact same time each day. If you miss a pill by more than 3 hours, you will need to use a back-up method for the next 48 hours.
  • benefit; reduce menstrual bleeding or stop period altogether
  • side effect
    • headache
    • nausea
    • breast tenderness
    • increase risk of breast ca

Combined oral contraceptive (COC) pills

  • contained progestin and estrogen
  • taken daily for 21 days followed by 7 days break when withdrawal bleeding ( menstruation) occurs
  • failure rates; 9 in 100 (0.09)
  • other form of COC – patch, vaginal ring
  • benefit;
    • regular, lighter, shorter menses
    • reduce cramps
    • improve acne
    • reduce menstrual migraine frequency
    • reduce unwanted hair growth
  • if women not breastfeeding, may start after 3 weeks postpartum unless they have rick of VTE, in which should only start COC after 6 weeks postpartum
  • side effect;
    • postpartum DVT
    • interfere with breastfeeding – should not be used by breastfeeding women until baby is 6 months old
    • risk of stroke and heart attacks ( not recommended in >35 years old, smoker, HPT, DM, stroke, breast ca)
    • breakthrough bleeding, headache, breast tenderness, nausea

Barrier method

spermicide

  • prevent transmission of gonorrhea and chlamydia.
  • It can be stored for long periods of time.
  • It may be messy, cause mild discomfort or minor allergic reaction, and can lead to yeast infections.
  • may cause vaginal irritation with frequent use

diaphragm

cervical cap

condoms

  • can use anytime
  • failure rates; 12 in 100 (0.12)
  • protect against STD
  • does not interfere breatsfeeding
  • cons
    • not suitable for pt with allergy to latex
    • interrupt sexual activity and may reduce sensation

withdrawal

  • can use anytime
  • failure rates; 18 in 100 (0.18)
  • does not interfere breatsfeeding

fertility awareness based methods (FAB)

  • can use anytime
  • failure rates; 24 in 100 (0.24)
  • not recommended post partum until women have regular menses for 3-4 cycles

Lactational amenorrhea method (LAM)

temporary method of birth control based on the natural way the body prevents ovulation when a woman is breastfeeding. It requires exclusive, frequent breastfeeding. The time between feedings should not be longer than 4 hours during the day or 6 hours at night. LAM may not be practical for many women.

emergency contraception

  • levonorgestrel (LNG) emergency contraception can be used anytime postpartum regardless of whether or not a woman is breastfeeding
  • high dose ethinyl estradiol either alone or in combination with progestogen (COCP) should not be used post partum due to risk of VTE
  • emergency IUD is most effective method

Gestational Trophoblastic Disease

GESTATIONAL TROPHOBLASTIC NEOPLASIA | Radiology Key

Gestational trophoblastic disease (GTD) is a group of rare tumors that involve abnormal growth of cells inside a woman’s uterus. GTD does not develop from cells of the uterus like cervical cancer or endometrial (uterine lining) cancer do. Instead, these tumors start in the cells that would normally develop into the placenta during pregnancy. (The term gestationalrefers to pregnancy.)

Types of gestational trophoblastic disease

  • Hydatidiform mole (complete or partial)
  • Invasive mole
  • Choriocarcinoma
  • Placental-site trophoblastic tumor
  • Epithelioid trophoblastic tumor

Normally, at fertilization, a single egg with 23 chromosomes fuses with a single sperm with 23 chromosomes, resulting in a new organism with 46 chromosomes. This can go wrong in two ways, so we have two kinds of moles – complete, or classic, and incomplete, or partial mole. Both lead to an abnormal proliferation of placental cells, and an abnormal placenta.

Complete mole appears when a chromosomally empty egg fuses with a normal sperm, and the sperm genetic material duplicates to form a 46 chromosome organism. However, this organism doesn’t have both maternal and paternal chromosomes, so the mole develops into a mass rather than developing into a fetus.

With a complete mole, the placenta secretes a huge amount of HCG. So affected females present with signs of pregnancy, like missed periods, and a positive urine pregnancy test.

Incomplete mole, on the other hand, appears when a normal egg is fertilized by two sperm – which forms an organism with 69 chromosomes, that usually develops into non-viable fetal parts.

image

Invasive mole (formerly known as chorioadenoma destruens) is a hydatidiform mole that has grown into the muscle layer of the uterus. Invasive moles can develop from either complete or partial moles, but complete moles become invasive much more often than do partial moles. Invasive moles develop in less than 1 out of 5 women who have had a complete mole removed. The risk of developing an invasive mole in these women increases if:

  • There is a long time (more than 4 months) between their last menstrual period and treatment.
  • The uterus has become very large.
  • The woman is older than 40 years.
  • The woman has had gestational trophoblastic disease in the past.

Choriocarcinoma is a malignant form of gestational trophoblastic disease (GTD). It is much more likely than other types of GTD to grow quickly and spread to organs away from the uterus.

Placental-site trophoblastic tumor (PSTT) is a very rare form of GTDthat develops where the placenta attaches to the lining of the uterus. This tumor most often develops after a normal pregnancy or abortion, but it may also develop after a complete or partial mole is removed.

Most PSTTs do not spread to other sites in the body. But these tumors have a tendency to grow into (invade) the muscle layer of the uterus.

Most forms of GTD are very sensitive to chemotherapy drugs, but PSTTs are not. Instead, they are treated with surgery, to completely remove disease.

Signs and symptoms

  • irregular vaginal bleeding range from light spotting to heavy bleeding, and parts of the mole may even be eliminated, and they look like grapes, or cherry-like clusters.
  • hyperemesis (due to huge amount of HCG)
  • excessive uterine enlargement
  • early failed pregnancy.
  • urine pregnancy test in women presenting with such symptoms.
  • physical examination shows a uterus that’s too big for gestational age since the mole grows much faster than a normal pregnancy would.

Rarer presentations in complete hydatidiform (high HCG level) include hyperthyroidism, early onset pre-eclampsia or abdominal distension due to theca lutein cysts.  HCG has a subunit that’s similar to TSH, FSH, and LH. This causes symptoms of hyperthyroidism – like insomnia, anxiety, tachycardia, and palpitations, as well as the formation of theca lutein cysts on the ovaries, which can cause adnexal mass symptoms like pain or pressure on the affected side.

Very rarely, women can present with acute respiratory failure or
neurological symptoms such as seizures; these are likely to be due to metastatic disease.

Diagnosis

  • ultrasound diagnosis of a partial molar pregnancy is more complex; the finding of multiple soft markers, including both cystic spaces in the placenta and a ratio of transverse to anterioposterior dimension of the gestation sac of greater than 1.5, is required for the reliable diagnosis of a partial molar pregnancy.
  • Estimation of hCG levels may be of value in diagnosing molar pregnancies: hCG levels greater than two multiples of the median may help.

Nephrotic Syndrome

  • definition: clinical syndrome of massive proteinuria defined by
    • oedema
    • hypoalbuminaemia
    • proteinuria
    • hypercholesterolaemia

signs and symptoms

  • Hypoalbuminaemia <25 g/l
  • Protienuria > 40 mg/m2/hour
  • Oedema
  • Hypercholeterolaemia
  • Pitting edema (95%) : Lower extremities, face, periorbital region, scrotum / labia, ascites , sudden weight gain -> Anasarca
  • hypovolaemia:
    • abdominal pain
    • cold periphery
    • poor capillary refilling
    • poor pulse volume
    • low blood pressure
  • tx: Infuse Human Albumin 0.5 – 1 g/kg/dose fast. do not give frusemide.
  • Hypervolemia
    • basal lung crepitations
    • rhonchi
    • hepatomegaly
    • hypertension

Etiology

  • Primary : idiopathic – common
  • Secondary: Post strep, SLE

Investigation

  • weight monitoring
  • strict i/o chart
  • FBC – TWC raised
  • Renal profile : Urea, Electrolyte, Creatinine
  • Serum cholesterol
  • Liver Function – albumin
  • Urine protein: creatinine ratio / 24 hour urine protein
  • Antinuclear factor / anti-dsDNA
  • Serum complement (C3, C4) – exclude SLE, post infectious
  • ASOT titre – to exclude post strep
  • renal biopsy – steroid resistant nephrotic syndrome

Treatment

  • start oral prednisolone
    • initially give 60mg/m2/day for 4 weeks (max 60mg)
    • then, alternate day 4o mg/m2/day for 4 weeks (max 40 mg/day)
    • then, taper over 4 weeks and stop

remission: urine dipstix trace/nil for 3 consecutive days

  • relapse: urine albumin excreation >40 mg/m2/hour or urine dipstix of =/> 2+ for 3 consecutive days.

SCN Clerking

AM REVIEW

*AM REVIEW must be complete and up to date with the progress*

B/O NORA / 32 HOURS OF LIFE (if more than 72 hours, just put how many days of life)

  • DOB: 1/8/2019 @ 3.30AM
  • SVD @ 39 weeks 2 days (if EMLSCS or ELLSCS, also state the reason – for suspicious CTG)
  • BW: 3.2 kg
  • CW: 3.0 kg (reduce 6.25%) – its normal for the baby to reduce in weight by 10-15% for the first 7-10 days then they will gain weight again. so if the weight reduce from 3.2 to 2.9 then up again to 3.0, dont state reduce. instead state increase using the difference between 2.9 and 3.0.
  • Apgar Score: 9/9
  • Liquor: clear/MMSL/LMSL
  • G6PD: normal or deficient – (only discharge baby if result of G6PD came out normal. if deficient, admit baby for 5 days for observation)
  • CTSH: normal is less than 21mIU/L
  1. mother / 25 years old/ Para 2
  2. Mother Blood Group – (if O+ve – think of ABO incompatibility in baby with jaundice onset less than 24 hours)
  3. HIV/VDRL: Nonreactive
  4. ANC:
    1. GBS Carrier (find out more about the risk)
      • low risk – mother received IV C-penicillin 2 doses more than 4 hours prior to delivery
      • moderate risk – mother received only 1 doses of IV C-penicillin less than 4 hours prior to delivery
      • high risk – no antibiotic given
      • any maternal risk- maternal pyrexia-maternal UTI
      • ARM for how many hours prior to delivery. PROM more than 18 hours is a risk factor for sepsis
    2. GDM on insulin
      • total insulin : 74 unit
      • latest HbA1c: 5.4% ( important to find out the glucose control. if uncontrol, baby had more risk of having hypoglycemia)
    3. Single Parent
      • was referred to JKSP
      • if underage- referred to Pelindung, but still under JKSP
    4. any other social issue

Issue:

  1. Neonatal Jaundice
    • noted at how many hours of life.
    • noted by whom. JM visiting?
    • any TSB taken, Reticulocyte count
    • TSB @ 23 HOL : 234 (PL, ET)
    • TSB trend. take note of any respecification of the risk
    • feeding history:
      • exclusive breastfeeding / mixed feeding if breastfeeding – how long each session, whats the frequency (sustained 30mins – 45 mins each session, every 2-3 hours)
      • good latching, good letdown, good suckling
      • if mixed feeding – type of formula, dilution- how many scoop for how many ounces, frequency and amount
      • no traditional medicine or goats milk consumption
  2. Infant of GDM mother on insulin
    • any jittery. any hypoglycemic symptom
    • reflo stable or not. less than 3 not stable
  3. Failure to thrive
  4. Infant of GBS carrier mother
    • on IV C-penicillin Day 2 and IV gentamicin Day 3 – to complete for 72 hours (must state abx on what day)
    • any sign of sepsis
    • TWC, Plt
    • Blood C+S

Progress/Currently:

  • tolerating feeding well
  • saturating well under room air
  • HR BP stable
  • Temp stable
  • PU BO normal
  • under single/double phototherapy

o/e: active, anterior fontanelle normotensive (AFNT), not tachypneic, CRT<2s, warm peripheries, good pulse volume,

  • lungs: clear
  • CVS: S1S2
  • PA: soft, not distended

Investigation

  • if on double photo, take TSB 4 hourly. if single photo, only take coming morning
  • if NNJ < 4 hours, suspect ABO. take ABO workup. BBG, FBC, Retics, Coombs
  • if presumed sepsis, take blood C+S
  • if on gentamicin, take renal profile post genta

Plan

  • Feeding – if on single photo – topup 10%. if double photo- topup 20%
  • For single/double photo
  • encourage breastfeeding on demand
  • IV C-penicillin 100, 000 unit/kg/doses
  • IV Gentamicin 5mg/kg/doses

Metabolic

Hypokalemia (K+ <2.5)

  1. ECG stat to look for hypokalemic changes
  2. 1g KCLin 100cc NS over 2hour (according to K+ level0 with continous cardiac monitoring
  3. add KCL in drip if any, mist KCL 15mls TDS/t slow K 600mg/1.2g OD
  4. off K supplements once K>4
  5. repeat 1 hour post correction
  6. Repeat cm?

ECG changes in Hypokalemia

  • Increased amplitude and width of the P wave
  • Prolongation of the PR interval
  • T wave flattening and inversion
  • ST depression
  • Prominent U waves (best seen in the precordial leads)
  • Apparent long QT interval due to fusion of the T and U waves (= long QU interval)

With worsening hypokalaemia…

  • Frequent supraventricular and ventricular ectopics
  • Supraventricular tachyarrhythmias: AF, atrial flutter, atrial tachycardia
  • Potential to develop life-threatening ventricular arrhythmias, e.g. VT, VF and Torsades de Pointes

Handy tips

  • Hypokalaemia is often associated with hypomagnesaemia, which increases the risk of malignant ventricular arrhythmias
  • Check potassium and magnesium in any patient with an arrhythmia
  • Top up the potassium to 4.0-4.5 mmol/l and the magnesium to > 1.0 mmol/l to stabilise the myocardium and protect against arrhythmias – this is standard practice in most CCUs and ICUs

Hyperkalemia (K+ >5.5)

  1. ECG stat to look for hyperkalemic changes
  2. off K supplements
  3. 10cc of 10% calcium gluconate in 10 minutes with cardiac monitoring + 50cc d50% glucose + 10 unit actrapid
  4. t kalimate 5-10g TDS
  5. off kalimate once K <5
  6. repeat 1 hour post chase
  7. repeat cm?

ECG manifestations in hyperkalaemia

  • Peaked T waves
  • Prolonged PR segment
  • Loss of P waves
  • Bizarre QRS complexes
  • Sine wave

Effects of hyperkalaemia on the ECG

Serum potassium > 5.5 mEq/L is associated with repolarization abnormalities:

  • Peaked T waves (usually the earliest sign of hyperkalaemia)

Serum potassium > 6.5 mEq/L is associated with progressive paralysis of the atria:

  • P wave widens and flattens
  • PR segment lengthens
  • P waves eventually disappear

Serum potassium > 7.0 mEq/L is associated with conduction abnormalities and bradycardia:

  • Prolonged QRS interval with bizarre QRS morphology
  • High-grade AV block with slow junctional and ventricular escape rhythms
  • Any kind of conduction block (bundle branch blocks, fascicular blocks)
  • Sinus bradycardia or slow AF
  • Development of a sine wave appearance (a pre-terminal rhythm)

Serum potassium level of > 9.0 mEq/L causes cardiac arrest due to:

  • Asystole
  • Ventricular fibrillation
  • PEA with bizarre, wide complex rhythm

Handy Tips

Suspect hyperkalaemia in any patient with a new bradyarrhythmia or AV block, especially patients with renal failure, on haemodialysis or taking any combination of ACE inhibitors, potassium-sparing diuretics and potassium supplements.

credit: Life in the fast lane ECG and sources from study crew

Vaginal Examination

  1. Vulva-vagina (check for abnormalities- varicosity, vesicles etc)
  2. Os (determine this by measuring one’s fingers)
  3. Cervix dilation, consistency, , thickness, length, position (anterior, axial, posterior) – both lips felt ~8cm , single lip felt ~ 9cm, no lips felt = fully
  4. Station – largest diameter of presenting part in relation to pelvic ischial spines
  5. Vertex (head felt)
  6. Membrane intact/absent- (slippery, balloon-like, bulging)
  7. no cord/placenta felt (tubal structure, pulsatile, rough, soft)

Lower Segment Caesarean Section

PROCEDURE

  1. PATIENT PUT IN SUPINE POSITION.
  2. ABDOMEN CLEANED AND DRAPED.
  3. PFANNESTIAL INCISION MADE AND ABDOMEN OPENED IN LAYERS
  4. UV FOLD IDENTIFIED AND SEPARATED
  5. BLADDER PUSHED AWAY CAUDALLY AND RETRACTED INFERIORLY WITH DOYAN’S RETRACTOR.
  6. TRANSVERSE INCISION MADE AT LOWER SEGMENT OF UTERUS.
  7. INCISION EXTENDED WITH BLUNT DISSECTION
  8. AMNIOTOMY DONE AND BABY DELIVERED
  9. PLACENTA AND MEMBRANES DELIVERED VIA CCT.
  10. UTERUS CLOSED IN 2 LAYERS WITH VICRYL 1-0
  11. FALLOPIAN TUBES AND OVARIES NORMAL
  12. HAEMOSTASIS SECURED.
  13. SWAB AND INSTRUMENT COUNTS WERE CORRECT.
  14. RECTUS SHEATH WAS CLOSED WITH VICRYL 1.
  15. SKIN WAS CLOSED VICRYL 2-0.
  16. VAGINAL TOILET DONE AND BLOOD CLOTS EVACUATED.

POST OPERATIVE MANAGEMENT

  1. TRANSFER OUT TO WARD ONCE PATIENT STABLE.
  2. ALLOW ORALLY
  3. LIE IN SUPINE POSITION FOR 6 HOURS (SPINAL)
  4. BP/ PR MONITORING 1/4HOURLY UNTIL STABLE
  5. CBD FOR ONE DAY
  6. STRICT PAD CHARTING.
  7. IVD 5 PINTS OF NSD5% / 24 H UNTIL PATIENT TAKING ORALLY WELL
  8. CONTINUE ANALGESIA AS ORDERED BY ANESTHETIST. EG: SERVE SUP VOLTAREN 75MG BD. START FIRST DOSE 6 HOURS POST OP
  9. SC HEPARIN 5000U BD TILL AMBULATING WELL
  10. IV CEFOBID 1G BD + IV METRONIDAZSOLE 500MG TDS X 24 HOURS
  11. WI DAY 2.
  12. STO NOT REQUIRED
  13. MODE OF DELIVERY NEXT PREGNANCY: TOS/LSCS
  14. FBC DAY 2
  15. IV PITOCIN 40U FOR 6H

Post Caesarian-section REVIEW

Age/race Para 1, Post ELLSCS 2 hours for breech presentation 

ANC: Breech presentation with oligohydromnios

Intra operative findings: from op notes

Progress:
Patient complains of minimal pain at the op site
Otherwise: No dizziness/headache, No SOB/chest pain No palpitations, No calf tenderness

Unable to move legs, sensations intact
Urine output: 400cc from the OT
Pad: 3/4 soaked since from the OT

Clinical:
alert and conscious, pink, hydration fair
not tachypneic, not tachycardic, vitals stable and afebrile

Lungs: clear with equal air entry bilaterally
CVS: DRNM
PA: soft with minimal tenderness at the op site uterus well contracted at 20 weeks dressing minimally soaked

Plan: To continue post op plan

credit to : Ampang HO guide

Click to access ogobook1.pdf

MgSo4 Preparation

Slow Bolus

(4gm in 10-15min)

  • 1 ampule= 5ml MgSo4 = 2.5gm so
  • 1 1/2 ampule= 8ml MgSo4 = 4gm
  • [use 20cc syringe, take 8ml MgSo4 + 12ml Normal Saline]

* use 3 way branula, give infusion while we also run Normal Saline for 15 min

Maintenance

10 ampule = 50ml MgSo4 = 25gm

  • [use 50cc syringe]
  • infusion 2cc/hr/24hr = 1g/hr

*1 ampule contain 2.47gm Mgso4

MgSo4 MOA

The mechanism of action of Magnesium sulfate in eclampsia is not clear. The postulated mechanisms are:

a. Central action: Voltage dependent blockade of NMDA (N-methyl D-aspartate) subtype of glutamate (excitatory) channel receptors

b. Peripheral action: At Neuromuscular Junction (NMJ), it causes –

  1. Blockage of calcium entering the cell and blocking calcium at intracellular sites/membranes
  2. Reduction of presynaptic acetylcholine (ACh) release at the endplate
  3. Reduction of motor endplate sensitivity to acetylcholine (ACh)

Role in Severe pre-eclampsia and Eclampsia:

Magnesium sulfate is an anticonvulsant rather than an anti-hypertensive. It prevents seizures in pre-eclampsia and doesn’t treat hypertension. In eclampsia, it is given as soon as the convulsion has ended.

It causes vasodilation, increases cerebral, uterine and renal blood flow. It decreased cerebral edema.

Monitoring Hourly for Magnesium Sulfate toxicity:

Suspend or postpone use of Magnesium sulfate, if any of the following is present:

  1. Respiratory rate < 16/min (Respiratory depression)
  2. Absent patellar reflex (Muscle paresis)
  3. Urine output < 30 ml/hour in preceding 4 hours (Impaired renal function)

Magnesium sulfate is preferred over Diazepam and Phenytoin because:

  1. Relatively less depression effect to mother or fetus
  2. Reduced risk of convulsions

Create a free website or blog at WordPress.com.

Up ↑

Design a site like this with WordPress.com
Get started