General Gynecology Flashcards
(313 cards)
Virchow’s Triad
Causes of DVT
- Hypercoagulable state
- Stasis or non-lamilar flow
- Irregular vessel wall (endothelial damage)
Risk factors for DVT?
- Age >40yo
- Surgery for malignancy
- Prolonged surgery >30 mins
- Obesity
- Delayed post-operative ambulation
- Medical Dz (DM, heart failure, COPD, prior DVT)
- Varicose veins
- Thrombophilias (50% of cases)
Mutations as etiology of DVT?
- MTHFR (Low risk of thrombosis)
- Leiden V (5% throm risk)
- Prothrombin G20210A (2-5% throm risk)
- Protein C (5-10% throm risk)
- Protein S (5% throm risk)
- Antitrhombin III (30-50% throm risk)
- Lupus anticoagulant (>5% risk)
Test for Anti-phospholipid Syndrome
(Acquired condition)
- Lupus anticoagulant
- Anti-Cardiolipin Ab
- Anti-b2-glycoprotein I
Work/up for DVT?
- Doppler u/s
- Test of choice for major (fem/pop) veins
- Sens/spec: 91/99%
- Not sensitive for tibial v or at/below ankle - Venography
- Gold standard
- invasive (use when other tests are equivocal) - Impedance Plethysmography
- highly sensitive but not specific
Clinical Features of PE
- dyspnea
- chest pain
- tachypnea
- hemoptysis
- tachycardia
Work-up for PE
- Spiral CT (sens/spec 94% for central PE)
- Arterial blood gas (PaO2 <90 mmHg)
- VQ scan- not very specific or sens
- ECG-nonspecific but recommended as adjunct (tachycardia & R-axis deviation)
Treatment of PE
Heparin with conversion to Warfarin
MOA of Heparin
Cofactor for Antithrombin II
Increases inhibition of thrombin and Factor Xa
Loading dose of Heparin for DVT vs PE?
DVT: 100u/kg (min 5000u)
PE: 150u/kg
Maintenance Dose of Heparin for DVT & PE?
15-25 u/kg/hr and convert to Warfarin once patient is stable (or sub Q heparin if patient is pregnant)
Prevention dose of Heparin?
5000 u BID (no effect on PTT)
5000 u every 8 hrs in pts with gyn cancers
Complications of Heparin
- Osteoporosis
- Alopecia
- Thrombocytopenia (long term tx)
Treatment protocol for DVT/PE with Heparin.
- 5000u bolus, then 1000-1200 u/hr x5d
- then sub Q 8000-10000 u BID
- establish PTT at 1.5-2.5 times normal
- Initiate Coumadin tx same day or after (not before)
Treatment protocol for DVT/PE with Lovenox.
- 1 mg/kg (generally 40-60 mg) BID or
- 1.5 mg/kg once daily
- Initiate Coumadin tx same day or after (not before)
- PT/PTT are normal w/ Lovenox
HIT- Which meds?
Can occur with Heparin or Lovenox
Repair of Bladder Injury
- Assess location of injury w/ respect to trigone
- Close in 3 layers if possible
a. Non-locking continuous 3-0 vicryl through mucosa & submucosa
b. Interrupted 3-0 vicryl to muscular layer
c. Interrupted 2-0 vicryl to para-vesical fascia layer - Instill sterile milk to assess integrity of closure
- Consider cystoscopy w/ or w/o indigo carmine
- Abx
- Indwelling catheter for 7 days
Repair of Ureteral Injury (End-to-End)
End-to-end anastamosis
-spatulate ends
-4-6 interrupted sutures of 4-0 chromic through full thickness of cut edge
-performed regardless of location provided no tension
-ureteric stents and bladder catheter in situ for 10 days
If end-to-end cannot be performed w/o tension consider other options
Ureteroneocystotomy
Implanting ureter into bladder
-typically if breach <5cm from bladder
If ureteral injury is >5cm from bladder what procedures can you try?
Psoas hitch
Boari flap
Ureteroureterotomy (implanting ureter into contralateral ureter)
Repair of Bowel Injury
Small bowel laceration parallel to long axis of bowel
(end-to-end closure), avoid narrowing of lumen
-mucosa/muscularis in single layer w/ interrupted vicryl 3-0
-muscularis/serosa w/ 3-0 non-absorbable suture
Small bowel laceration at right angles to long axis of bowel (side to side narrowing)
Bowel Prep
Option 1 Day -1: Golytely 1.5 L/hr till clear
Day -0:Cefoxitin 2gm iv 30 mins pre-op
Option 2 Day -1 Neomycin 1gm + Erythromycin 1gm at 2, 4, +10pm
Cherney
Excise rectus muscle off pubis, can damage inferior epigastric vessels- good exposure of lower abdomen
Maylard
Muscle cutting: must ligate inferior epigastric vessels behind lateral rectus sheath edge. Do not separate sheath off rectus muscle-good exposure of abdomen