Chronic Kidney Disease and Postoperative Morbidity After Elective Orthopedic Surgery.
Summary of "Chronic Kidney Disease and Postoperative Morbidity After Elective Orthopedic Surgery."
Background: Reduced estimated glomerular filtration rate (eGFR) is strongly associated with increased cardiovascular risk and all-cause mortality. Associations with morbidity in elective, moderate-risk noncardiac surgery have not been explored. We hypothesized that chronic kidney disease (CKD) would be associated with excess morbidity after elective, moderate-risk orthopedic surgery. Methods: Patients undergoing elective orthopedic joint replacement procedures were studied, representing a large proportion of global surgical procedures and characterized by highly homogeneous anesthetic and surgical practice. eGFR was calculated from routine creatinine measurements using the Modification of Diet in Renal Disease equation. CKD was defined as eGFR <60 mL/min/1.73 m(2). Cardiac risk (Revised Cardiac Risk Index) and evidence-based, perioperative factors associated with perioperative morbidity (operative time, blood loss, perioperative temperature) were also recorded prospectively. The primary end point was postoperative morbidity, recorded prospectively using the postoperative morbidity survey. Morbidity differences were analyzed between patients with CKD and normal preoperative renal function (chi(2) test for trend) and presented as hazard ratio (HR) or odds ratio (OR) with 95% confidence intervals (95% CIs). The secondary end points were time to hospital discharge and time to become morbidity free (analyzed by log-rank test), both between and within CKD compared with normal renal function patients. Multiple regression analysis was performed to assess the association of CKD, perioperative factors with morbidity, and length of hospital stay. Results: Postoperative morbidity survey was recorded in 526 patients undergoing elective orthopedic surgery. CKD patients (n = 142; 27%) sustained excess morbidity on postoperative day 5 (OR 2.1 [95%
1.2-3.7]; P < 0.0001). CKD patients took longer (HR 1.6 [95%
1.2-1.9]) to become morbidity free (log-rank test, P < 0.0001). Time to hospital discharge was delayed by 4 days in CKD patients (HR 1.4 [95%
1.2-1.7]; P = 0.0001; log-rank test). CKD patients sustained more pulmonary (OR 2.2 [95%
1.3-3.6]; P = 0.002), infectious (OR 1.7 [95%
1.1-2.7]; P = 0.01), cardiovascular (OR 2.4 [95%
1.2-4.8]; P = 0.01), renal (OR 2.3 [95%
1.5-3.5]; P < 0.00,001), neurological (OR 4.3 [95%
1.3-17.7]; P = 0.005), and pain (OR 1.8 [95%
1.03-3.1]; P = 0.04) morbidities. Further stratification of CKD revealed preoperative eGFR =50 mL/min/1.73 m(2) to be associated with more frequent morbidity and longer hospital stay, independent of age. Multiple regression analysis identified CKD (P = 0.006) and congestive cardiac failure (P = 0.002) as preoperative factors associated with prolonged hospital stay. Conclusions: A substantial minority of patients with CKD undergoing elective orthopedic procedures are at increased risk of prolonged morbidity and hospital stay. Preoperative eGFR may enhance perioperative risk stratification beyond traditional risk factors.
From the *Department of Medicine, Wolfson Institute for Biomedical Research, University College London;
This article was published in the following journal.
Name: Anesthesia and analgesia
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20807976
- DOI: http://dx.doi.org/10.1213/ANE.0b013e3181ee8456
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Medical and Biotech [MESH] Definitions
Conditions in which the KIDNEYS perform below the normal level for more than three months. Chronic kidney insufficiency is classified by five stages according to the decline in GLOMERULAR FILTRATION RATE and the degree of kidney damage (as measured by the level of PROTEINURIA). The most severe form is the end-stage renal disease (CHRONIC KIDNEY FAILURE). (Kidney Foundation: Kidney Disease Outcome Quality Initiative, 2002)
The end-stage of CHRONIC RENAL INSUFFICIENCY. It is characterized by the severe irreversible kidney damage (as measured by the level of PROTEINURIA) and the reduction in GLOMERULAR FILTRATION RATE to less than 15 ml per min (Kidney Foundation: Kidney Disease Outcome Quality Initiative, 2002). These patients generally require HEMODIALYSIS or KIDNEY TRANSPLANTATION.
Surgery which could be postponed or not done at all without danger to the patient. Elective surgery includes procedures to correct non-life-threatening medical problems as well as to alleviate conditions causing psychological stress or other potential risk to patients, e.g., cosmetic or contraceptive surgery.
Abnormal enlargement or swelling of a KIDNEY due to dilation of the KIDNEY CALICES and the KIDNEY PELVIS. It is often associated with obstruction of the URETER or chronic kidney diseases that prevents normal drainage of urine into the URINARY BLADDER.
A severe irreversible decline in the ability of kidneys to remove wastes, concentrate URINE, and maintain ELECTROLYTE BALANCE; BLOOD PRESSURE; and CALCIUM metabolism. Renal failure, either acute (KIDNEY FAILURE, ACUTE) or chronic (KIDNEY FAILURE, CHRONIC), requires HEMODIALYSIS.