Management of the kidney patient during Pregnancy Jeffrey J Kaufhold, MD FACP 2013.

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Presentation transcript:

Management of the kidney patient during Pregnancy Jeffrey J Kaufhold, MD FACP 2013

Summary Fertility in renal disease Complications related to pre-existing renal disease, including Dialysis and transplant. Pathophysiology (brief, see the kidney in pregnancy lecture for more detail Hypertension in pregnancy Diabetes and other renal disease cases

Summary Fertility in renal diseases Renal disease Transplant ESRD on dialysis Pregnancy in renal diseases Pre-existing renal disease Hypertension Transplant ESRD on dialysis

Impact of pregnancy on renal disease Hemodynamic changes– Hyperfiltration Reduced uric acid, hypercalciuria Increase in proteinuria Pregnancy related illness – Pre-eclampsia Possibility of permanent loss of renal function

Impact of renal disease on Pregnancy Increased risk of pre-eclampsia Increased incidence of prematurity, intrauterine growth retardation Increased risk of fetal loss.

Renal Pathophysiology in Pregnancy Hypertension Proteinuria Pre-ecclampsia HELLP syndrome Pre-existing renal disease Pre-existing Hypertension

Pathophysiology Hypertension Proteinuria Return of Responsiveness to Angiotensin

Pathophysiology Pre-ecclampsia Severe HTN with risk for seizures Vacuole formation in endothelial cells Circulating Inhibitors of NOS HELLP syndrome Hepatic dysfunction due to underperfusion Low platelets due to fibrin deposition and scything of cells in capillaries Increased Endothelin

Normal Glomerulus

Ecclampsia Hyaline thrombus vacuoles

Pre-existing disease in pregnancy Pre-existing renal disease General rule is 1/3 worsen 1/3 stable 1/3 improve Pre-existing Hypertension Tends to improve Which drugs to use?

Hypertension treatment in pregnancy Hypertension Which drugs? First Line: Aldomet, Labetolol Second Line: Hydralazine, Pindolol, Acebutolol, Nifedipine. Third Line: Atenolol, Inderal, clonidine, diltiazem, verapamil, HCTZ Contraindicated: ACE inhibitors, ARBs, Tekturna Try to avoid use: Diuretics

Fetal consequences of maternal hypertension 3-6 fold increase in stillbirths 5-15 fold increase in IUGR Increased Prematurity Increase in Long term developmental and neurologic problems

Classification of Hypertensive disorders in pregnancy Transient hypertension Chronic Hypertension Chronic hypertension with superimposed preeclampsia Pre-eclampsia Eclampsia

Clinical features of chronic HTN in Pregnancy Women tend to be older, multiparous HTN is present before 20 weeks, or known to be present in prior pregnancy BP may improve or normalize in mid pregnancy Risk of superimposed pre-eclampsia is %

Antihypertensive therapy considerations Lower the BP for Maternal safety Lowering BP does not prevent or cure preeclampsia nor benefits the fetus, but may allow delivery to be postponed safely. Maintain ureteroplacental blood flow Timely delivery Seizure prophylaxis with Mag Sulfate.

Antihypertensive therapy considerations If delivery is imminent: Hydralazine IV Labetolol IV Calcium Channel blockers Diazoximide IV If delivery must be postponed Aldomet Labetolol CCBs, Alpha Blockers Hydralazine Clonidine

Pregnancy in patients with Diabetic nephropathy Increased proteinuria70 % Decreased GFR40 % Increased BP70 % Pre-eclampsia35 % Fetal development problems 20 % Fetal Demise8 %

PCKD in Pregnancy Increased risk of UTI Maternal HTN associated with poor outcome Associated with increased size and number of liver cysts due to estrogen stimulation May be increased risk of subarachnoid hemorrhage in women with intracranial aneurysm

Pregnancy and SLE Poor outcome associated with: Active disease at time of conception First appearance of SLE during pregnancy HTN, Azotemia in first trimester High titer of APL or lupus anticoagulant

Pregnancy and Antiphospholipid antibody syndrome (APL) Increased risk of fetal loss Aterial and venous thrombosis Renal vasculitis Thrombotic microangiopathy Pre-eclampsia Treatment : heparin, Lovenox, Aspirin

Differentiate lupus flare up vs Pre-eclampsia Lupus will have RBC casts, low complement, Leukopenia Pre-eclampsia may have Elevated LFTs

Dialysis and Pregnancy Successful term delivery % High incidence of Prematurity Outcome related to maternal residual renal function Management issues: Increase clearance/ Daily dialysis/consider CAPD? ESA therapy Control BP Lower heparin dose

Renal Transplant and pregnancy Well functioning transplant restores fertility in a percentage but not all women Women are advised to wait 2 yrs after transplant before considering pregnancy Successful term delivery depends on BP and baseline renal function (best under ) Controversial if pregnancy accelerates graft loss.

Renal Transplant and pregnancy Immunosuppression issues: Cellcept is contra-indicated in pregnancy Switch to Imuran Calcineurin inhibitors are acceptable, but there is increased risk of fetal loss Prednisone does not cross placental barrier, try to use lowest dose (5-10 mg /day) Does carry some increased risk of cleft palate when used in first trimester.

Pregnancy after Kidney Donation Likelihood of full term delivery reduced from 84 % in general population to 74 % post-donation Higher likelihood of fetal loss 19 % compared to 11 % Higher risk of Gestational diabetes 2.7 % vs 0.7 % Gestational HTN 5.7 % vs 0.6 % Proteinuria 4.3 % vs 1.1 % Preeclampsia 5.5 % vs 0.8 % Pregnancy outcomes after kidney donation, Am J Transplant Apr 9, vol 4: Ibrahim, Akina et al.

Case 1 26 yo female with Living related Renal transplant 10 years ago, on Cellcept and Neoral. Having irregular menses (is this typical or atypical?) Complains of nausea and cramps during some but not all menses. Management would include: Tylenol? NSAIDs? Hormone replacement therapy? Skelaxin (metaxalone) ? Midol?

Case 2 26 yo female with Living related Renal transplant 10 years ago, on Cellcept and Neoral. On Altace for HTN with good BP control. Comes in for routine appt with questions regarding pregnancy. Before she gets pregnant, (or as soon as possible after it is known) which med changes do you make?

Case 2 26 yo female with Living related Renal transplant 10 years ago, on Cellcept and Neoral. On Altace for HTN with good BP control. Comes in for routine appt with questions regarding pregnancy. Before she gets pregnant, (or as soon as possible after it is known) which med changes do you make? Convert Cellcept to Imuran Convert Altace to Labetolol, or aldomet, or hydralazine.

Case 3 28 yo female with Steroid dependent Minimal Change Disease is well controlled on Cellcept and able to wean off Prednisone. She stops Cellcept after a year in remission in order to get pregnant. 8 weeks into her pregnancy she notes explosive onset of edema and frothy urine. 24 hour urine protein is 8.8 gm/day. Options for management: A. Resume cellcept since it worked before B. Start prednisone 60 mg / day (1 mg/Kg) for 3 months C. Start Prednisone 30 mg every other day for 3 weeks, and cyclosporine 5 mg/kg / day in divided dose. D. Start prednisone 30 mg every other day for 3 weeks then taper to 10 mg daily until delivery. E. No treatment until after delivery.

Case 3 Comments: Either C or D is reasonable. Increased risk of fetal loss, DVT and infection if nephrotic syndrome left untreated. Remember to use stress dose steroids at time of delivery if mother received any steroids at any point during pregnancy.

References Medical Care of the Pregnant Patient RV Lee, K Rosene-Montella et al. Published by the American College of Physicians (acponline.org), 2000 Kidney Disease and Pregnancy Dr Phyllis August Pregnancy Outcomes after kidney Donation after-kidney-donation after-kidney-donation Ibrahim et al. Am J Transplant Apr;9(4): Maynard SE, Thadani R. Pregnancy and the Kidney. JASN Vol 20, 2009, p