{"id":12349,"date":"2017-01-03T20:08:48","date_gmt":"2017-01-03T20:08:48","guid":{"rendered":"http:\/\/phosdev.com\/todaysveterinarypractice\/?p=12349"},"modified":"2022-04-13T18:16:42","modified_gmt":"2022-04-13T18:16:42","slug":"treatment-chronic-kidney-disease-dogs-cats","status":"publish","type":"post","link":"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/urology-renal-medicine\/treatment-chronic-kidney-disease-dogs-cats\/","title":{"rendered":"Treatment Guidelines for Chronic Kidney Disease in Dogs and Cats"},"content":{"rendered":"<p>Chronic kidney disease (CKD) affects an estimated 1% to 3% of all cats and 0.5% to 1.5% of all dogs.<sup>1<\/sup> Nephron damage associated with CKD is usually irreversible and can be progressive (<strong>Figure 1<\/strong>). CKD is a major cause of morbidity and mortality, especially in older dogs and cats.<\/p>\n<div id=\"attachment_12360\" style=\"width: 461px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F02Fig01.jpg\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-12360\" class=\"wp-image-12360 \" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F02Fig01.jpg\" alt=\"t1701f02fig01\" width=\"451\" height=\"283\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F02Fig01.jpg 957w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F02Fig01-300x188.jpg 300w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F02Fig01-768x482.jpg 768w\" sizes=\"(max-width: 451px) 100vw, 451px\" \/><\/a><p id=\"caption-attachment-12360\" class=\"wp-caption-text\">Figure 1. Potential mechanisms of progressive loss of nephrons in chronic kidney disease.<\/p><\/div>\n<p>Because renal replacement therapy (dialysis and transplantation) is not widely available in veterinary medicine, management of CKD in dogs and cats focuses on:<\/p>\n<ul>\n<li>Early detection<\/li>\n<li>Renoprotective treatments designed to slow the progressive loss of nephrons.<\/li>\n<\/ul>\n<div class=\"mceTemp\"><\/div>\n<div class=\"orange-box\">\n<h2>View the IRIS Guidelines<\/h2>\n<ul>\n<li>Staging of CKD <a href=\"http:\/\/iris-kidney.com\/guidelines\/staging.html\">iris-kidney.com\/guidelines\/staging.html<\/a><\/li>\n<li>Treatment Recommendations for CKD <a href=\"http:\/\/iris-kidney.com\/guidelines\/recommendations.html\">iris-kidney.com\/guidelines\/recommendations.html<\/a><\/li>\n<li>Grading of AKI <a href=\"http:\/\/iris-kidney.com\/guidelines\/grading.html\">iris-kidney.com\/guidelines\/grading.html<\/a><\/li>\n<\/ul>\n<\/div>\n<h2><strong>International Renal Interest Society<\/strong><\/h2>\n<p>Many different terms have been used to describe renal disease and decreased renal function. Unfortunately, these terms can be confusing due to a lack of standard definition and application (eg, renal insufficiency and end-stage renal disease\/failure).<\/p>\n<p>The International Renal Interest Society (IRIS, iris-kidney.com) was created to advance the scientific understanding of kidney disease in small animals and, specifically, to help practitioners better diagnose, understand, and treat canine and feline renal disease.<\/p>\n<p>IRIS has created an internationally recognized set of guidelines for the classification and treatment of kidney disease; these guidelines are available on the IRIS website and address:<\/p>\n<ul>\n<li>Staging of CKD<\/li>\n<li>Treatment recommendations for CKD<\/li>\n<li>Grading of AKI (acute kidney injury).<\/li>\n<\/ul>\n<div class=\"orange-box\">\n<h2>Learn More<\/h2>\n<p>Read Early Diagnosis of Chronic Kidney Disease in Dogs &amp; Cats: Use of Serum Creatinine &amp; Symmetric Dimethylarginine in the March\/April 2016 issue of Today\u2019s Veterinary Practice, available at tvpjournal.com.<\/p>\n<\/div>\n<h2>Staging Canine and Feline CKD<\/h2>\n<p>The IRIS Staging of CKD guidelines were developed as a guide to classifying stable canine and feline CKD in order to both improve communications surrounding CKD and link appropriate diagnostic and therapeutic efforts to patients with varying degrees of CKD.<\/p>\n<p>These guidelines have been published in well-known textbooks, such as Current Veterinary Therapy and Textbook of Veterinary Internal Medicine, and have been adopted by the American and European Societies of Veterinary Nephrology and Urology (asvnu.org and esvnu.eu, respectively).<sup>2,3<\/sup><\/p>\n<p>This staging system is not used to make a diagnosis of CKD but is employed following a diagnosis of CKD in order to facilitate appropriate treatment, monitoring, and further diagnostics.<\/p>\n<h3><strong>Serum Creatinine Concentration<\/strong><\/h3>\n<p>The IRIS staging system is based primarily on serum creatinine concentrations (<strong>Table 1<\/strong>) and applies only to dogs and cats that are well hydrated and have stable CKD\u2014stability is documented by &lt; 20% variation in serum creatinine concentrations over at least a 2-week interval.<\/p>\n<p><a href=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table01-1.jpg\"><img decoding=\"async\" class=\"wp-image-12351  aligncenter\" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table01-1.jpg\" alt=\"t1701f01table01\" width=\"352\" height=\"279\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table01-1.jpg 650w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table01-1-300x238.jpg 300w\" sizes=\"(max-width: 352px) 100vw, 352px\" \/><\/a><\/p>\n<p>Note that the lower end of serum creatinine concentrations in Stage 2 lies within the reference interval for many laboratories. Serum creatinine concentration is a relatively insensitive marker of renal function and, therefore, dogs and cats with serum creatinine concentrations near the upper end of the laboratory reference interval may have reduced glomerular filtration rates.<\/p>\n<p>Serum creatinine concentrations must always be interpreted in light of the patient\u2019s muscle mass, urine specific gravity, and physical examination findings in order to rule out pre- and postrenal causes of azotemia.<\/p>\n<p>The IRIS CKD staging system cannot be applied to patients with:<\/p>\n<ul>\n<li>Pre- or postrenal azotemia<\/li>\n<li>Acute or decompensated (sometimes termed acute on chronic) kidney disease.<\/li>\n<\/ul>\n<div class=\"orange-box\">\n<p>The IRIS stages of CKD are primarily defined by serum creatinine concentration (<strong>Table 1<\/strong>) and then further classified by:<\/p>\n<ul>\n<li>Presence or absence of proteinuria (<strong>Table 2<\/strong>)<\/li>\n<li>Systemic hypertension (<strong>Table 3<\/strong>).<\/li>\n<\/ul>\n<p><a href=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2017\/01\/TVP-2017-0102_IRIS-CKD_Corrected-Table-2.jpg\"><img decoding=\"async\" class=\"wp-image-12510  aligncenter\" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2017\/01\/TVP-2017-0102_IRIS-CKD_Corrected-Table-2.jpg\" alt=\"\" width=\"351\" height=\"197\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2017\/01\/TVP-2017-0102_IRIS-CKD_Corrected-Table-2.jpg 702w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2017\/01\/TVP-2017-0102_IRIS-CKD_Corrected-Table-2-300x168.jpg 300w\" sizes=\"(max-width: 351px) 100vw, 351px\" \/><\/a><br \/>\n<a href=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table03-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12353  aligncenter\" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table03-1.jpg\" alt=\"t1701f01table03\" width=\"350\" height=\"239\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table03-1.jpg 650w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table03-1-300x205.jpg 300w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/a><\/p>\n<\/div>\n<h3><strong>SDMA Concentrations<\/strong><\/h3>\n<p>Interpretation of serum symmetric dimethylarginine (SDMA) concentrations, along with serum creatinine concentrations, may increase the sensitivity for early diagnosis of CKD.<sup>4,5<\/sup><\/p>\n<h3><strong>Renal Proteinuria<\/strong><\/h3>\n<p>Proteinuria is an important risk factor for the development of azotemia in cats and the progression of azotemia and decreased survival in both dogs and cats.<sup>6-8<\/sup> Presence or absence of proteinuria is used to substage CKD (<strong>Table 2<\/strong>) in the IRIS staging system.<\/p>\n<p>Renal proteinuria can be glomerular and\/or tubular in origin (ie, excessive filtration, decreased tubular reabsorption, or both). Renal proteinuria is persistent\u2014with at least 2 positive tests separated by 10 to 14 days\u2014and associated with inactive urine sediments.<\/p>\n<p>Urine protein\/creatinine ratios (UPCs) &gt; 2 suggest glomerular-range proteinuria, which is rare in cats compared with dogs.<\/p>\n<p>It is important to recognize that the UPC does not differentiate renal proteinuria from proteinuria associated with lower urinary tract inflammation; the clinician needs to make this determination by assessing the patient and urine sediment.<\/p>\n<h3><strong>Systolic Blood Pressure<\/strong><\/h3>\n<p>IRIS blood pressure substaging is based, in part, on risk of target organ\u2014eye, brain, heart, and kidney\u2014damage (<strong>Table 3<\/strong>). In the absence of target organ damage, persistence of hypertension should be documented.<\/p>\n<p>Systolic blood pressure is typically measured by the Doppler methodology in dogs and cats.<\/p>\n<p>Although it is preferable to measure blood pressure on different days, it is acceptable to perform 2 measurements at least 2 hours apart. Most clinicians consider systolic hypertension to be &gt; 160 mm Hg and initiate treatment at that point.<\/p>\n<h2>Diagnostic Approach After Staging<\/h2>\n<p>In general, the diagnostic approach to a patient once CKD has been identified and staged focuses on 3 areas (<strong>Table 4<\/strong>).<\/p>\n<p><a href=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table04-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12354  aligncenter\" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table04-1.jpg\" alt=\"t1701f01table04\" width=\"450\" height=\"353\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table04-1.jpg 650w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table04-1-300x235.jpg 300w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<ol>\n<li><strong>Characterization of primary renal disease and\/or complicating disease processes.<\/strong><br \/>\nFurther definition of the renal disease\u2014beyond a standard minimum database\u2014should include diagnostics to rule out potentially treatable conditions\/complications; for example, urine culture for urinary tract infection and kidney imaging for renal lymphosarcoma.<\/li>\n<\/ol>\n<ol start=\"2\">\n<li><strong>Characterization of the stability of renal disease and function.<\/strong><br \/>\nStability of renal function should be assessed by serial monitoring of abnormalities identified during initial characterization of the renal disease (<strong>Table 5<\/strong>). If the same laboratory and methodology are used, increases in serum creatinine &gt; 0.3 mg\/dL are suggestive of changes in renal function rather than assay variability. It is important to rule out dehydration as a cause of increasing serum creatinine concentrations.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12355  aligncenter\" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table05-1.jpg\" alt=\"t1701f01table05\" width=\"350\" height=\"279\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table05-1.jpg 617w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table05-1-300x240.jpg 300w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/p>\n<ol start=\"3\">\n<li><strong>Characterization of patient problems associated with decreased renal function.<\/strong><br \/>\nPatient problems associated with decreased renal function (<strong>Table 4<\/strong>) may include anorexia, nausea, vomiting, weight loss, dehydration, acidosis, potassium depletion, and anemia.<\/li>\n<\/ol>\n<h3><strong>Timing of Diagnostics<\/strong><\/h3>\n<p>In the early stages of CKD, characterization of primary renal disease and\/or complicating disease processes, as well as determining disease stability, are most important\u2014when appropriate treatment has the greatest potential to improve or stabilize renal function.<\/p>\n<p>In the later stages of CKD, characterization of patient problems becomes more important\u2014when clinical signs tend to be more severe. In these later stages, diagnostic and subsequent therapeutic efforts should be directed at patient problems.<\/p>\n<h2>Therapeutic Approach to CKD<\/h2>\n<h3><strong>Therapy Tailored to CKD Stage<\/strong><\/h3>\n<p>Similar to the diagnostic approach, the therapeutic approach to CKD should be tailored to each individual patient and that patient\u2019s stage of disease (<strong>Tables 4 and 6<\/strong>). Serial monitoring of the patient\u2014after treatment has been initiated\u2014allows the clinician to modify treatment based on patient response (<strong>Table 5<\/strong>).<\/p>\n<p>For example, disease specific treatments for ureteroliths and bacterial pyelonephritis, as well as treatments designed to slow the progression of renal disease (renoprotective treatments), are of most value in the earlier stages of CKD. In the later stages of CKD, treatment tends to be focused on quality of life and managing clinical signs associated with decreased renal function.<\/p>\n<p><a href=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table06.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12356  aligncenter\" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table06.jpg\" alt=\"t1701f01table06\" width=\"450\" height=\"358\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table06.jpg 650w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table06-300x239.jpg 300w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/a><strong>Renoprotective Treatments<\/strong><\/p>\n<div class=\"orange-box\"><\/div>\n<p>Renoprotective treatments include:<\/p>\n<ul>\n<li>Dietary change designed to reduce serum phosphorus concentrations and decrease soft tissue mineralization<sup>9,10<\/sup><\/li>\n<li>Potentially angiotensin-converting enzyme (ACE) inhibitors, calcium channel antagonists (CCA), and angiotensin receptor blockers (ARB) to normalize systemic and intraglomerular blood pressures and reduce proteinuria (<strong>Table 7<\/strong>)<sup>11-14<\/sup><\/li>\n<li>Potentially, calcitriol supplementation.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table07.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12357  aligncenter\" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table07.jpg\" alt=\"t1701f01table07\" width=\"453\" height=\"200\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table07.jpg 650w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table07-300x132.jpg 300w\" sizes=\"(max-width: 453px) 100vw, 453px\" \/><\/a><\/p>\n<p>CCAs are typically the first line of defense for moderate to severe hypertension in cats, while ACE inhibtors are typically the first line of defense for hypertension in dogs as well as proteinuria in dogs and cats.<\/p>\n<p>There is some evidence in dogs and cats that CCAs upregulate the renin\u2013angiotensin\u2013aldosterone system and, therefore, combined treatment with an ACE inhibitor is often recommended.<sup>15,16<\/sup> Vasoactive drugs (ACE inhibitors, CCAs, and ARBs) should not be administered to dehydrated patients.<\/p>\n<p>In patients in which hypertension and\/or proteinuria are refractory to initial ACE inhibitor treatment, the standard dose can be doubled at least once, combined with a CCA, or the ACE inhibitor may be replaced with an ARB (eg, telmisartan).<\/p>\n<p>For patients with Stage 2 CKD, calcitriol supplementation (0.5\u20131 ng\/kg PO, separate from feeding) is a potentially renoprotective treatment in dogs<sup>17<\/sup> but unproven in cats. Patients should be normocalcemic, with serum phosphorus concentrations within the target range (see Treatment Goals), prior to calcitriol supplementation.<\/p>\n<h3><strong>Phosphorus Reduction<\/strong><\/h3>\n<p>Reduction of phosphorus intake is a major treatment goal for dogs and cats with Stage 2 and beyond CKD. The first line of defense against higher serum phosphorus concentrations is a gradual transition to a renal diet. A gradual transition over several weeks from a maintenance diet to a renal diet helps avoid any aversion to the renal diet.<\/p>\n<p>Most renal diets are not only phosphorus restricted but:<\/p>\n<ul>\n<li>Contain reduced amounts of protein and salt<\/li>\n<li>Are supplemented with omega-3 fatty acids<\/li>\n<li>Are alkalinized to help offset the metabolic acidosis associated with CKD.<\/li>\n<\/ul>\n<p>Feline renal diets are also often supplemented with potassium.<\/p>\n<p>Enteric phosphate binders are the second line of defense if serum phosphorus is &gt; 4.6 mg\/dL after dietary phosphorus restriction (see Treatment Goals). Many different enteric phosphate binders exist but all need to be well mixed with the diet or administered at the time of feeding.<\/p>\n<p>To increase efficacy, the binder should be in the gut when phosphorus from the diet is also there. The dose of the binder required to meet the target serum phosphorus goal will vary with the amount of phosphorus being fed and the stage of CKD.<\/p>\n<p>Use of calcium containing enteric phosphate binders in dogs and cats receiving calcitriol should be avoided or monitored closely for hypercalcemia (total and ionized calcium concentrations). CKD dogs with a product of serum calcium \u00d7 phosphorus concentrations &gt; 70 mg\/dL have reduced survival times.<sup>18<\/sup><\/p>\n<h3><strong>Treatment Goals<\/strong><\/h3>\n<p>Goals for antihypertensive treatment and antiproteinuric treatment are a systolic blood pressure &lt; 160 mm Hg and a UPC &lt; 0.4 in cats and 0.5 in dogs. Alternatively, a reduction of &gt; 50% of the baseline UPC is an acceptable response.<\/p>\n<p>Target serum phosphorus concentrations are:<\/p>\n<ul>\n<li>Stage 2 CKD: &gt; 2.7 but &lt; 4.6 mg\/dL<\/li>\n<li>Stage 3 CKD: &gt; 2.7 but &lt; 5 mg\/dL<\/li>\n<li>Stage 4 CKD: &gt; 2.7 but &lt; 6 mg\/dL<\/li>\n<\/ul>\n<p>Note that most laboratory reference intervals for serum phosphorus include concentrations much higher than 4.6 mg\/dL.<\/p>\n<h2><strong>IRIS Treatment Recommendations<\/strong><\/h2>\n<h2><strong style=\"font-size: 16px\">Stage 1 CKD Patients<\/strong><\/h2>\n<ol>\n<li>Identify and correct any prerenal or postrenal disorders. Dehydration is the most common prerenal abnormality encountered, especially if urine-concentrating ability is compromised. Any clinical or suspected subclinical dehydration should be corrected with isotonic, polyionic replacement fluid solutions, such as lactated Ringer\u2019s solution either IV or SC.<\/li>\n<\/ol>\n<ol start=\"2\">\n<li>Identify and treat any treatable primary disease processes (eg, renal lymphoma and hypercalcemia) or complicating disorders (eg, urinary tract infections and ureteroliths).<\/li>\n<\/ol>\n<ol start=\"3\">\n<li>Pursue additional diagnostics recommended for Stage 1 CKD patients, including:<\/li>\n<\/ol>\n<ul>\n<li>Urine culture and sensitivity: Many urinary tract infections are subclinical in CKD patients<\/li>\n<li>Urinary tract radiography: Ideal for localization of radiopaque uroliths (<strong>Figure 2<\/strong>)<\/li>\n<li>Urinary tract ultrasound: Ideal for assessing kidney tissue architecture and renal pelvic dilation.\n<div id=\"attachment_12361\" style=\"width: 361px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F02Fig02.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-12361\" class=\"wp-image-12361 \" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F02Fig02.jpg\" alt=\"t1701f02fig02\" width=\"351\" height=\"291\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F02Fig02.jpg 722w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F02Fig02-300x249.jpg 300w\" sizes=\"(max-width: 351px) 100vw, 351px\" \/><\/a><p id=\"caption-attachment-12361\" class=\"wp-caption-text\">Figure 2. Lateral abdominal radiograph of a cat with uroliths.<\/p><\/div>\n<p>4. Identify and treat hypertension and renal proteinuria. In Stage 1 CKD patients, a systolic blood pressure &gt; 160 mm Hg is indicative of hypertension, while a UPC &gt; 0.4 in cats and &gt; 0.5 in dogs indicates renal proteinuria. Dietary sodium and protein reduction (eg, a renal diet) combined with ACE inhibitors, CCAs, and ARBs are used to reduce hypertension and proteinuria.<\/li>\n<\/ul>\n<ol start=\"5\">\n<li>Discontinue all potentially nephrotoxic drugs.<\/li>\n<\/ol>\n<ol start=\"6\">\n<li>Assess CKD stability or progression by monitoring patients at least twice a year. Dogs and cats with Stage 1 CKD (<strong>Table 8<\/strong>) are at risk for kidney disease progression; however, not all Stage 1 CKD patients progress to become azotemic. Those with borderline hypertension and proteinuria should be monitored closely.<a href=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table08.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-12358 size-full\" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table08.jpg\" alt=\"t1701f01table08\" width=\"650\" height=\"330\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table08.jpg 650w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table08-300x152.jpg 300w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><\/a><\/li>\n<\/ol>\n<h3><strong>Stage 2 CKD Patients<\/strong><\/h3>\n<ol>\n<li>In both dogs and cats, pursue all treatments for Stage 1.<\/li>\n<\/ol>\n<ol start=\"2\">\n<li>Identify and treat any primary renal disease or complicating condition, which is still an important goal in Stage 2 CKD. Dogs and cats with mid to late Stage 2 CKD often have progressive loss of renal function, although the rate of renal disease progression can be variable.<\/li>\n<\/ol>\n<ol start=\"3\">\n<li>Reduce phosphorus intake with renal diets and enteric phosphate binders (if needed to meet goals).\u2014This is a major treatment goal for dogs and cats with Stage 2 and beyond CKD.<\/li>\n<\/ol>\n<ol start=\"4\">\n<li>Consider calcitriol supplementation\u2014a potentially renoprotective treatment in dogs and cats. In dogs and cats receiving calcitriol, avoid use of calcium containing enteric phosphate binders or monitor patients closely for hypercalcemia.<\/li>\n<\/ol>\n<ol start=\"5\">\n<li>Monitor patients for metabolic acidosis.<br \/>\nStage 2 CKD patients should be monitored for metabolic acidosis by measuring serum bicarbonate or total CO<sub>2<\/sub> If necessary, renal dietary therapy may be supplemented with oral sodium bicarbonate or potassium bicarbonate in order to maintain serum bicarbonate concentrations in the 18 to 24 mmol\/L range.<\/li>\n<\/ol>\n<ol start=\"6\">\n<li>Assess CKD stability or progression by monitoring patients Q 3 to 6 months.<\/li>\n<\/ol>\n<h3><strong>Stage 3 CKD Patients<\/strong><\/h3>\n<ol>\n<li>In both dogs and cats, pursue all treatments for Stage 1 and 2 CKD.<\/li>\n<\/ol>\n<ol start=\"2\">\n<li>Continue renoprotective treatments (eg, renal diets, antihypertensive and antiproteinuric treatments) as Stage 3 CKD patients have progressive renal disease and it is important\u2014as in State 2 CKD patients\u2014to slow disease progression.<\/li>\n<\/ol>\n<ol start=\"3\">\n<li>Initiate symptomatic treatment to improve quality of life (Table 4) because many dogs and cats with Stage 3 CKD, especially late Stage 3 CKD, begin showing clinical signs.<\/li>\n<\/ol>\n<ol start=\"4\">\n<li>Assess CKD stability or progression by monitoring patients Q 3 months; those with early Stage 3 CKD can be monitored Q 6 months, while those with late Stage 3 CKD should be monitored Q 1 to 2 months.<\/li>\n<\/ol>\n<h3>Stage 4 CKD Patients<\/h3>\n<ol>\n<li>In both dogs and cats, pursue all treatments for Stage 1, 2, and 3 CKD.<\/li>\n<\/ol>\n<ol start=\"2\">\n<li>Continue renoprotective treatments (eg, renal diets, antihypertensive and antiproteinuric treatments) as these treatments are still important in early Stage 4 CKD patients but invariably the management focus shifts to making the patient as comfortable as possible given its renal failure.<\/li>\n<\/ol>\n<ol start=\"3\">\n<li>Continue symptomatic treatment to improve quality of life (<strong>Table 4<\/strong>). Owners frequently\u2014 and rightfully\u2014equate nausea, decreased appetite, vomiting, and weight loss with poor quality of life.<\/li>\n<\/ol>\n<ol start=\"4\">\n<li>Stop the catabolic spiral of calorie malnutrition\u2014one of the primary management goals in Stage 4 CKD (<strong>Table 4<\/strong>). Appetite stimulants, antiemetics, and gastric acid blocking drugs become important in these patients (<strong>Table 7<\/strong>), but correction of metabolic deficits (eg, dehydration) and excesses (eg, hyperphosphatemia) is a higher priority.<sup>19,20<\/sup><\/li>\n<\/ol>\n<ol start=\"5\">\n<li>Monitor serum creatinine concentrations closely in Stage 4 CKD dogs and cats that are being treated with vasoactive drugs for hypertension and\/or proteinuria.<\/li>\n<\/ol>\n<ol start=\"6\">\n<li>Reevaluate patients Q 1 to 2 months.<\/li>\n<\/ol>\n<h2><strong>Summary<\/strong><\/h2>\n<p>Understanding the diagnostic and therapeutic priorities based on the stage of CKD facilitates appropriate management of dogs and cats with CKD. Identification and correction of any primary or complicating diseases are most important in Stage 1 and 2 patients. Renoprotective treatments are most important in Stage 2 and 3 patients. Symptomatic patient therapy to improve quality of life is most important in Stage 4 patients.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12359  aligncenter\" src=\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table09.jpg\" alt=\"t1701f01table09\" width=\"521\" height=\"359\" srcset=\"https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table09.jpg 915w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table09-300x207.jpg 300w, https:\/\/navc.sitepreview.app\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2016\/12\/T1701F01Table09-768x530.jpg 768w\" sizes=\"(max-width: 521px) 100vw, 521px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>International Renal Interest Society Recommendations for treating Chronic kidney disease in dogs and cats.<\/p>\n","protected":false},"author":16,"featured_media":12362,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"iawp_total_views":29638,"footnotes":""},"categories":[348],"tags":[13],"class_list":["post-12349","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-january-february-2017","tag-peer-reviewed","column-features","clinical_topics-urology-renal-medicine"],"acf":{"hide_sidebar":false,"hide_sidebar_ad":false,"hide_all_ads":false},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.7 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Treatment Guidelines for Chronic Kidney Disease in Dogs &amp; Cats<\/title>\n<meta name=\"description\" content=\"Here are the International Renal Interest Society Recommendations for treating chronic kidney disease in dogs and cats.\" \/>\n<meta name=\"robots\" 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