Exhaustive Nursing Study Guide: Obstetrics, Pediatrics, and Endocrine Specialties

Magnesium Sulfate Drug Guide

  • Classification: Electrolyte.

  • Action:     * Decreases acetylcholine released by motor nerve impulses, blocking neuromuscular transmission.     * Depresses the Central Nervous System (CNS) to act as an anticonvulsant.     * Decreases frequency and intensity of uterine contractions.     * Produces flushing and sweating by decreasing peripheral blood pressure.

  • Indications:     * Prevention and control of seizures in severe preeclampsia.     * Prevention of uterine contractions in preterm labor.

  • Dosage and Route:     * Loading Dose: 4−6 g4-6\,g of magnesium sulfate in 100 mL100\,mL IV fluid administered over 15−20 minutes15-20\,minutes.     * Continuous Infusion: Commonly 2 g/h2\,g/h for maintenance.     * Alternative: Deep intramuscular (IM) injection is acceptable but painful.

  • Absorption and Excretion:     * Immediate onset via IV.     * Excreted by the kidneys.

  • Contraindications: Myocardial damage, heart block, myasthenia gravis, or impaired renal function.

  • Magnesium Toxicity Signs: Thirst, mental confusion, decreased reflexes, flushing, sweating, hypotension, Respiratory Rate (RR < 12\,breaths/min), and Deep Tendon Reflex (DTR) depression.

  • Nursing Implications:     * Monitor BP closely.     * Assess for RR≥12 breaths/minRR \geq 12\,breaths/min, O2O_{2} saturation ≥95%\geq 95\%, presence of DTRs, and urinary output > 30\,mL/h.     * Keep Calcium Gluconate (antidote) and resuscitation equipment (suction, oxygen) in the room.     * Administer via secondary ("piggyback") line.

Preeclampsia Management

  • Home Care for Mild Preeclampsia:     * Requires stable maternal/fetal condition and visits every 33 or 44 days.     * Patient must report worsening signs: visual disturbances, severe headache, epigastric pain, or diminished fetal movement.     * Activity: Side-lying position for 1.5 hours/day1.5\,hours/day to maximize placental blood flow.     * Monitoring: Kick counts (report decrease/absence in 4−hour4-hour period), BP checks 2−4×/day2-4\times/day, and daily morning weights.     * Urinalysis: Daily protein dipstick test using first voided midstream specimen.

  • Inpatient Severe Preeclampsia:     * Criteria: Systolic BP ≥160 mm Hg\geq 160\,mm\,Hg or Diastolic BP ≥110 mm Hg\geq 110\,mm\,Hg.     * Requires corticosteroids for fetal lung maturity if gestation is < 34\,weeks.

  • HELLP Syndrome:     * Stands for Hemolysis, Elevated Liver enzymes, Low Platelets.     * Symptoms: Bleeding, Right Upper Quadrant (RUQ) pain, dyspnea, nausea, vomiting, and neuro changes.     * Treatment: Delivery, blood products, antihypertensives (Labetalol is #1 IV medication, Hydralazine, Nifedipine, Methyldopa), and Magnesium Sulfate.

Stages of Labor and Nursing Interventions

  • First Stage (Onset to 10 cm10\,cm Dilation):     * Latent Phase: 1−3 cm1-3\,cm dilation. Contractions every 15−30 min15-30\,min, lasting 20−45 sec20-45\,sec. Mother is excited/talkative.     * Active Phase: 4−7 cm4-7\,cm dilation. Contractions every 3−5 min3-5\,min, lasting 40−60 sec40-60\,sec. Mother is apprehensive. Encourage urination to prevent bladder hindering contractions.     * Transition Phase: 8−10 cm8-10\,cm dilation. Contractions every 2−3 min2-3\,min, lasting 60−90 sec60-90\,sec. Mother is restless/agitated. Monitor for perineal bulging and rectal pressure.

  • Second Stage (Pushing Phase):     * Starts with full dilation and ends with delivery of the baby.     * Duration: 2−3 hours2-3\,hours for first-time moms; 30 min30\,min for multipara.

  • Third Stage (Placental Delivery):     * Occurs 5−30 min5-30\,min after birth.     * Signs: Lengthening umbilical cord, gush of blood, uterus changes to globular shape.     * Delivery Sides: "Dirty Duncan" (maternal side, red/rough) or "Shiny Schultz" (fetal side, shiny).

  • Fourth Stage (Recovery Phase):     * First 4 hours4\,hours after birth. Monitor fundus (should be midline, firm, at umbilicus).

Fetal Heart Monitoring (VEAL CHOP MINE)

  • Variable Decelerations: Cause: Cord compression. Intervention: Move mother (left side-lying), O2O_{2}, stop Pitocin.

  • Early Decelerations: Cause: Head compression. Intervention: Intervention not needed (mirror contractions).

  • Accelerations: Cause: Okay! (Sign of fetal well-being). Intervention: No intervention needed (15 sec15\,sec increase above baseline).

  • Late Decelerations: Cause: Placental insufficiency. Intervention: Emergent actions (Position change, O2O_{2}, IV fluids, stop Pitocin, contact PCP).

  • Normal Fetal Heart Rate: 110−160 BPM110-160\,BPM.

Postpartum Complications Case Study: Amy

  • Patient Profile: 35 y/o35\,y/o, G4 P4G4\,P4, delivered 9 lb9\,lb baby via forceps, history of preeclampsia.

  • PPH (Postpartum Hemorrhage) Risk Factors: High parity (P4P4), large baby (9 lb9\,lb), forceps delivery (lacerations), and Magnesium Sulfate use (relaxes uterus).

  • Uterine Atony: Most common cause of PPH. Fundus is boggy; bleeding in spurts/dark blood. Treatment: Fundal massage until firm, empty bladder.

  • Perineal Trauma/Lacerations: Second most common cause. Bright red continuous trickle with a firm fundus.

  • Medications for PPH:     * Pitocin (Oxytocin): First-line treatment.     * Methergine: Do not give if history of Hypertension (HTN).     * Hemabate (Carboprost): Stimulates contractions. Contraindicated in asthma; can cause diarrhea.     * Cytotec (Misoprostol): Helps with bleeding.

  • Hematoma: Signs include intense rectal pressure and pain. Collection of blood may bulge in the vagina. Treatment: Ice packs for first 12−24 hours12-24\,hours.

Labor Procedures and Methods

  • Amniotomy (AROM): Artificial rupture of the amniotic sac.     * Risks: Prolapsed cord (highest risk if station is high), infection (chorioamnionitis), and abruptio placentae.     * Nursing: Monitor FHR for 1 full minute1\,full\,minute after rupture; check temp every 2 hours2\,hours (> 100.4^{\circ}F is abnormal).

  • Induction vs. Augmentation:     * Induction: Starting labor using medical methods (Bishop score ≥8\geq 8 preferred).     * Augmentation: Making existing labor stronger/faster.     * Cervical Ripening: Uses Prostaglandins (Misoprostol/Cytotec, Cervidil).

  • Breathing Techniques:     * Slow Paced: 6−9 breaths/min6-9\,breaths/min (1/21/2 normal rate).     * Modified Paced: No faster than 2×2\times normal rate.     * Patterned (Hee-Hoo): 2−62-6 breaths followed by a blow.

Gestational Diabetes Mellitus (GDM)

  • Risk Factors: BMI > 25, maternal age > 25, previous GDM, high-risk ethnicity.

  • Screening:     * Glucose Challenge Test (GCT): 24−28 weeks24-28\,weeks. Drink 50 g50\,g glucola; if 1\,hr > 140, proceed to 3−hr3-hr test.     * Oral Glucose Tolerance Test (OGTT): Fasting required. Drink 100 g100\,g glucola. Diagnostic if 22 or more values elevated:         * Fasting: > 95         * 1\,hr: > 180         * 2\,hr: > 155         * 3\,hr: > 140

  • Maternal Hypoglycemia S/S: Shakiness, sweating, pallor, disorientation, headache.

  • Maternal Hyperglycemia S/S: Fatigue, flushed skin, dry mouth, excessive thirst, acetone breath.

Pediatric GI and Surgical Disorders

  • Cleft Lip/Palate:     * Signs: Milk coming out of nose, poor suction.     * Nursing: Use special compressible bottles/long nipples (Obturator); clean suture lines post-op; use elbow restraints ("No-nos").

  • Esophageal Atresia and TEF:     * Signs: Three C's (Coughing, Choking, Cyanosis), excess salivation.     * Intervention: NPO, elevated HOB to 30∘30^{\circ}, suction pouch.

  • Abdominal Wall Defects:     * Omphalocele: Herniation into umbilical cord, covered by translucent sac.     * Gastroschisis: Herniation (usually right of umbilicus), no protective sac.

  • Pyloric Stenosis: Projectile vomiting after every feed, olive-shaped mass in RUQ. Treatment: Pyloromyotomy.

  • Intussusception: Sausage-shaped mass, "currant jelly" stools (blood/mucus). Treated with air/hydrostatic enema.

  • Hirschsprung Disease: Missing ganglion cells. Delayed meconium passage, ribbon-like stools. Do not take rectal temperatures.

Pediatric Renal and Cardiac Conditions

  • Hypospadias: Urethral opening on ventral (bottom) side of penis. Epispadias is on dorsal (top).

  • Testicular Torsion: Surgical emergency. Sudden severe pain, absent cremasteric reflex. Must be salvaged within 6 hours6\,hours.

  • Nephrotic Syndrome: Severe proteinuria (frothy urine), generalized edema. Treated with Prednisone (avoid live vaccines).

  • Digoxin: Increases cardiac output and contractility; lowers HR.     * Range: 0.8−2.0 ng/mL0.8-2.0\,ng/mL.     * Nursing: Hold if HR < 100 in infants; monitor Potassium (hypokalemia increases toxicity risk).

  • Tetralogy of Fallot: Components include VSD, Right Ventricular Hypertrophy, Pulmonary Stenosis, and Overriding Aorta. "Tet spells" treated with knee-to-chest position.

  • Kawasaki Disease: Red "strawberry" tongue, bilateral conjunctivitis, rash. Treated with high-dose IVIG and aspirin.