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Nocturia: Causes, Consequences and Clinical Approaches

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1 Nocturia: Causes, Consequences and Clinical Approaches
Jeffrey P. Weiss, MD, FACS Professor and Chair Department of Urology SUNY Downstate College of Medicine Brooklyn, NY

2 Nocturia Definition: voiding during (nocturnal) sleep time
Preceded and followed by sleep (ICS guidelines) Normal: nocturia < 1x* Scientific problems: How to define sleep time Is patient awakened by the need to void, or, Do patients void because they’re awake *van Kerrebroeck et al Neurourol and Urodyn 21: , 2002

3 What triggers nocturia*?
50 men and women mean # nocturia=2.6 Nocturia awakenings attrib’d to urge vs not 78% nocturic voids prec’d by urge to void In the remainder the pt awakened for some other reason, then voids out of habit or convenience before going back to sleep The etiology and treatment of these two groups is likely different *Blaivas JG, Amirian M, Weiss JP et al: Why do people void at night?. SUFU abstract 2010

4 Nocturia Medical/Renal? Urological/Lower tract dysfunction?
Nocturnal polyuria Polyuria Urological/Lower tract dysfunction? Diminished global/nocturnal bladder capacity

5 Nocturia – at least 1 void/night

6 Nocturia: Consequences
Mediated by Sleep Deprivation

7 Nocturia is associated with increased mortality
% 100 95 ≤1 2 Percent survival 90 3 85 ≥4 80 Copyright for abstract book if key slide Days Hazard Ratio of all-cause mortality: Night time frequency ≤1 (n=425) 2 (n=219) 3 (n=99) ≥4 (n=41) p for trend 1.00 1.59 (0.80, 3.17) 2.34 (1.09, 5.00) 3.60 (1.38, 9.35) <0.01 Adjusted for age, sex, BMI, diabetes, smoking status, history of coronary heart disease renal diseases and stroke, use of tranquilizers, hypnotics, and diuretics. Nakagawa et al. J Urol 2010;183(Suppl):4 7 7

8 Nocturia is associated with increased mortality
Summary of 3 major new studies Nakagawa et al.1 (788 men and women, yrs): significantly increased mortality risk in elderly patients with 2, 3, and 4 vs. 1 voids/night Kupelian et al.2 (15,988 men and women, ≥20yrs): significantly increased mortality risk with 2+ vs. <2 voids/night Magnitude of the nocturia and mortality association was greater in those younger than 65 years and in those without baseline comorbidities Lightner et al.3 (2,447 men, yrs): significantly increased mortality risk and CHD risk in younger patients (40 to 59 yrs) with ≥3 voids/night The impact is greater in younger patients The impact increases with number of voids Details from references 3 MORTALITY IN THE ELDERLY CORRELATES WITH THE FREQUENCY OF NIGHTTIME VOIDING: RESULTS OF A 5-YEAR PROSPECTIVE COHORT STUDY IN JAPAN Haruo Nakagawa*, Sendai, Japan; Kaijun Niu, Aendai, Japan; Yasuhiro Kaiho, Yoshihiro Ikeda, Yoichi Arai, Sendai, Japan INTRODUCTION AND OBJECTIVES: Nocturia is a common problem that increases with age. It is often the result of an overproduction of urine at night (nocturnal polyuria), but may also be associated with several pathophysiological conditions, such as cardiovascular disease, diabetes mellitus, sleep apnea syndrome, renal dysfunction, lower urinary tract dysfunction and sleep disorders. An increased mortality rate has been reported with nocturia, and may be related to these associated conditions, or independently to nocturia. This study aimed to evaluate the association between night time frequency and mortality in a community-based elderly population. METHODS: We conducted a Comprehensive Geriatric Assessment of all residents aged 70 years in 2003 in an urban district of north Japan. The population-based cross-sectional survey was conducted using an extensive health interview for each participant. Mortality was investigated using data from the national health insurance system over 5 years. Differences in survival stratified by the night time frequency of urination were assessed with Kaplan-Meier curves. Hazard ratios (HRs) were estimated from multivariate Cox proportional hazard models. RESULTS: Seven hundred and eighty-eight subjects were included in the study (28.9% participation rate; 429 females, 359 males; mean age 76.0 years: range: years). Kaplan-Meier curves representing mortality are shown in Figure 1. After multivariable adjustment, the HRs (95% confidence intervals) for mortality were 1.59 ( ), 2.34 ( ) and 3.60 ( ) for people who voided 2, 3 and 4 times/night compared with 1 per night (p-value for trend 0.01: Table 1). The number of nighttime voiding episodes was associated with a significantly increased mortality. CONCLUSIONS: We conclude that there is a significantly increased mortality associated with the nighttime frequency of urination, even after adjustment for several factors that could contribute to mortality. 56 NOCTURIA IS A MARKER OF INCREASED MORTALITY RISK: RESULTS FROM THE THIRD NATIONAL HEALTH AND NUTRITION EXAMINATION SURVEY Varant Kupelian*, Watertown, MA; Mary Fitzgerald, Maywood, IL; Steven Kaplan, New York, NY; Jens Peter Norgaard, Copenhagen, Denmark; Gretchen Chiu, Raymond Rosen, Watertown, MA INTRODUCTION AND OBJECTIVES: Nocturia, a common symptom in both men and women, has been shown to be associated with chronic illnesses such as heart disease and hypertension. Using data from the Third National Health and Nutrition Examination Survey (NHANES III), the objective of this study is to investigate the association of nocturia with subsequent mortality risk. METHODS: NHANES III is a national probability survey of the U.S. conducted between 1988 and Nocturia was assessed by the question “how many times a night do you usually get up to urinate (pass water)?”. Mortality data was obtained by linkage of the NHANES III to death certificate data found in the National Death Index with follow-up through December 31, Cox proportional hazards regression models were used to assess the association between nocturia and mortality and to control for the effect of potential confounders and effect modifiers. Analyses were conducted on a sample of 15,988 men and women age 20 and older. RESULTS: Overall prevalence of nocturia, defined as two or more episodes of urination per night, was 15.5% among men and 20.9% among women, and increased rapidly with age. Multivariate analyses show a statistically significant trend towards increased mortality risk with increased number of voiding episodes among both men and women. Analyses stratified by age groups (50, 50-64, and 65 and older), show associations of larger magnitudes in the younger age groups with attenuated but statistically significant associations in the oldest age group. Adjustment for heart disease, diabetes, and obesity suggests that the association between nocturia and mortality is only partially explained by those chronic conditions. CONCLUSIONS: Nocturia is a predictor of mortality, more so in relatively younger men and women, rather than in the elderly. Comorbid conditions that are already recognized as being related to nocturia, only partially explain the increased risk of mortality. This suggests that other, unmeasured factors are contributory. Possible candidates include effects of sleep disruption and of other unrecognized comorbid medical conditions. Association of nocturia and mortality by gender and age. Unadjusted and adjusted hazard ratios (HR) and 95% confidence intervals (95%CI) comparing respondents with nocturia >2 to those with nocturia <2 per night. Age Men Women Unadjusted HR (95% CI) Adjusted HR* (95%CI) (2.20, 7.63) 2.56 (1.32, 4.94) 2.70 (1.53, 4.76) 1.10 (0.66, 1.86) (1.40, 3.02) 1.60 (1.06, 2.41) 2.25 (1.56, 3.25) 1.94 (1.27, 2.96) (1.36, 2.00) 1.35 (1.11, 1.63) 1.54 (1.31, 1.82) 1.19 (1.04, 1.37) Overall 4.75 (3.95, 5.72) 1.49 (1.25, 1.78) 3.58 (3.05, 4.20) 1.32 (1.14, 1.51) *Adjusted for age, BMI, marital status, education, smoking, CVD, diabetes, hypertension, medications use (diuretics, antihypertensive, lipid lowering, antidepressants) 1527 SIGNIFICANT NOCTURIA IS ASSOCIATED WITH AN INCREASED RISK OF CORONARY HEART DISEASE AND DEATH Deborah Lightner*, Amy Krambeck, Debra Jacobson, Michaela McGree, Rochester, MN; Steven Jacobsen, Pasadena, CA; Michael Lieber, Veronique Roger, Rochester, MN; Cynthia Girman, Chapel Hill, NC; Jennifer St. Sauver, Rochester, MN INTRODUCTION AND OBJECTIVES: Nocturia is increasingly seen as a marker of overall health, and specifically of cardiac risk. We examined the associations between nocturia and development of diabetes, hypertension, coronary heart disease (CHD) and death in a population-based cohort of men. METHODS: A randomly selected cohort of 2,447 Caucasian men, aged years in 1990, from Olmsted County, MN was enrolled in the study (55% baseline participation). Participants completed a questionnaire that assessed lower urinary tract symptoms (LUTS) with questions similar to the AUA Symptom Index (AUASI). Nocturia was defined as awakening to urinate 0, 1, 2, or 3 or more times a night. Diabetes was determined by self-report or use of anti-hyperglycemic medication. Hypertension was determined by self-report or use of anti-hypertensive medication. CHD was ascertained through ongoing surveillance of heart disease in Olmsted County (RO1 HL 59205; Principal Investigator: VL Roger). Proportional hazard models were used to determine associations between baseline nocturia and time to development of diabetes, hypertension, CHD or death. RESULTS: At baseline, 934 (39%), 1055 (43%), 247 (10%) and 193 (8%) men reported awakening to urinate 0, 1, 2 and 3 or more times per night, respectively. Baseline nocturia was not associated with the development of diabetes or hypertension. However, baseline nocturia of 3 or more times per night was associated with development of CHD among younger men (40 to 59 years old at baseline; hazard ratio (HR): 2.06, 95% confidence interval (CI): 1.11, 3.82). This association was not observed in men greater than 60 years old (HR: 0.90, 95% CI: 0.54, 1.48). Baseline nocturia of 3 or more times per night was also associated with an increased risk of death (age-adjusted HR: 1.59, 95% CI: 1.20, 2.11). This association remained after further adjustment for CHD (age and CHD-adjusted HR: 1.49, 95% CI: 1.12, 1.99). CONCLUSIONS: Significant nocturia in young men appears to be associated with CHD and mortality, but not with other markers of vascular status, such as diabetes and hypertension. As the etiology of nocturia was not determined, attribution is not possible, but men under 60 years of age with significant nocturia may be candidates for further evaluation. Nakagawa et al. J Urol 2010;184: Kupelian et al. J Urol Vol. 185, , February 2011 Lightner et al. AUA 2010

9 Nocturia: Evaluation Simple arithmetic analysis of 24 hour voiding diary First AM voided volume included in NUV First AM void diurnal, not nocturnal

10 Diary Assessment NPi (Nocturnal polyuria index = NUV/240 volume):
Ni (Nocturia index = NUV/MVV): Ni >1: Nocturia occurs because functional bladder capacity (maximum voided volume) is exceeded

11 Diary Assessment: NBCi
NBCi (Nocturnal Bladder Capacity index) > 0: Diminished nocturnal bladder capacity Higher NBCi >> Nocturia occurs at voided volumes < MVV

12 Diary Assessment: NBCi
NBCi = Actual minus Predicted # nightly voids (ANV-PNV) PNV = Ni - 1 Example: Patient with Nocturia (ANV) x7 NUV = 750 ml MVV = 250 ml Ni = NUV / MVV = 3 PNV = 3-1 = 2 NBCi = ANV-PNV = 7-2 = 5

13 Formulas for evaluation of nocturia
Analysis Nocturia index Ni = NUV  MVV Ni >1  nocturia is due to NUV exceeding MVV Nocturnal Polyuria index NPi = NUV  24hV NPi >33%  Dx is nocturnal polyuria Nocturnal bladder capacity index Ni – 1 = PNV NBCi = ANV – PNV NBCi >0  nocturia occurring at volumes < MVV

14 Nocturia Category Causes Congestive heart failure Diabetes mellitus
Nocturnal polyuria Congestive heart failure Diabetes mellitus Obstructive sleep apnea Peripheral edema Excessive nighttime fluid intake

15 Diminished global/NBC
Nocturia Category Causes Diminished global/NBC Prostatic obstruction Nocturnal detrusor overactivity Neurogenic bladder Cancer of bladder, prostate, or urethra Learned voiding dysfunction Anxiety disorders Pharmacologic agents Bladder calculi Ureteral calculi

16 Nocturia Category Causes Polyuria (global) Diabetes mellitus
Diabetes insipidus Primary polydipsia

17 Summary Classification of nocturia through use of the voiding diary “unlocks” up to 17 significant underlying medical conditions which potentially contribute to its genesis Efficacy of nocturia treatment based upon this analysis is unproven summary

18 Nocturia: Classification
Nocturnal polyuria (NP) Diminished global/nocturnal bladder capacity (NBC) Mixed (NP +  NBC) Polyuria

19 Nocturnal polyuria: “medical” cause for nocturia
NUV > 6.4 ml / kg* Nocturnal diuresis  0.9 ml/min (54 ml/hr) Krimpen study (Bosch): Men 50-78: mean NUV=60 ml/hr Suggest NP cutpoint >90 ml/hr** NUV/24h urine ≥ 0.33 (ICS) <25 years: mean NPi=0.14 >65 years: mean NPi=0.34*** *Matthiesen, T.B., et al: J. Urol., 156: 1292, 1996 **Blanker, M. H. et al: J. Urol., 164: 1201, 2000 ***Kirkland J.L. et al: Br Med J., 287: 1665, 1983

20 Sleep Disordered Breathing / Nocturia
Sleep apnea: Sudden cessation of respiration due to airway obstruction during sleep Older adults with severe SDB have a greater number of nocturia episodes Yalkut, D., et al.: J. Lab. Clin. Med., 128: 322, 1996 Endeshaw, YW et al: J Am Geriatrics Soc. 52(6):957-60, 2004

21 Sleep Apnea: Rx with nasal CPAP (continuous positive airway pressure)
*Nocturia in 88 men studied with OSA: avg. x3.8 ± 0.4 Diminished to x 0.7 ± 0.27 after Rx with nasal CPAP* **Nocturia in 196 women: median 3 episodes > 0 episodes per night (p<.001) with CPAP “Nocebo” effect of CPAP machine obviates lack of placebo Greater contribution to nocturia etiology in younger pts*** *Guilleminault C, Lin CM, Goncalves MA and Ramos E: J Psychosomatic Res 56: , 2004 **Fitzgerald MPet al: Am J Obstet Gynecol. 2006;194: ***Moriyama Y, Miwa K, Tanaka H et al. Urology 2008; 71:1096-8

22 Remember: Patients are on many agents which may cause nocturia
Increased urine output Insomnia and CNS effects Direct LUT effects Diuretics CNS stimulants (dextroamphetamine, methylphenidate) Ketamine: Direct toxin SSRIs Antihypertensives (alpha-blockers, beta-blockers, methyldopa) Tiaprofenic acid (Surgam): Toxic cystitis Calcium channel blockers Respiratory (albuterol, theophylline) Cyclophosphamide Tetracycline Decongestants (phenylephrine, pseudoephedrine) Lithium Hormones (corticosteroids, thyroid) Psychotropics (MAOIs, SSRIs, atypical antidepressants) Dopaminergic agonists (carbidopa) Antiepileptics (phenytoin)

23 Pharmacological treatment of nocturnal polyuria
(Timed) Diuretics Prevent water accumulation by forcing water out of the system May be helpful in patients with lower limb venous insufficiency or congestive cardiac failure Level 2 evidence, Grade C recommendation (ICI 2005) Bumetanide 1mg po in afternoon (Pederson PA et al BJU 1988) Furosemide 40mg po in afternoon (Reynard JM et al BJU 1998) (Timed) Antidiuretics Helps retain water until a more appropriate time Reduce nocturnal voids and voided volume Level 1 evidence, Grade A recommendation Desmopressin 0.1mg po titrated to 0.4mg (van Kerrebroeck PE et al: Desmopressin in the treatment of nocturia: a double-blind, placebo-controlled study. Eur Urol 2007; 52: 221.) No direct bladder effect No direct cardiovascular actions Hyponatremia main potentially adverse effect

24 Nocturia: Classification
Nocturnal polyuria (NP) Diminished global/nocturnal bladder capacity (NBC) Mixed (NP +  NBC) Polyuria

25 Causes of Low global/NBC: Urologic
Infravesical obstruction Idiopathic nocturnal detrusor overactivity Neurogenic bladder Cystitis: bacterial, interstitial, tuberculous, radiation Cancer of bladder, prostate, urethra

26 Other causes of low global/NBC
Learned voiding dysfunction Anxiety disorders Pharmacologic xanthines (theophylline, caffeine) beta-blockers Other (see next slide) Bladder calculi Ureteral calculi

27 Drug effects Increased urine output Insomnia and CNS effects
Direct LUT effects Diuretics CNS stimulants (dextroamphetamine, methylphenidate) Ketamine: Direct toxin SSRIs Antihypertensives (alpha-blockers, beta-blockers, methyldopa) Tiaprofenic acid (Surgam): Toxic cystitis Calcium channel blockers Respiratory (albuterol, theophylline) Cyclophosphamide Tetracycline Decongestants (phenylephrine, pseudoephedrine) Lithium Hormones (corticosteroids, thyroid) Psychotropics (MAOIs, SSRIs, atypical antidepressants) Dopaminergic agonists (carbidopa) Antiepileptics (phenytoin)

28 Low global/NBC: Treatment
Dx & Rx of remediable conditions Empiric Rx

29 Nocturia persists despite prostate surgery
Third National Health and Nutrition Examination Survey (NHANES III) in the USA showed Amongst those who undergo TURP, Nocturia (≥2 voids per night) persists for 41% of 60–69 year olds 50% of ≥70 year olds P=0.099 and in paper Platz et al. Urology 2002;59;877–883

30 Patients scoring ≥2 before TURP
TURP and nocturia 118/138 (85.5%) BPO patients had nocturia before TURP After treatment, 91 of these (77.1%) still reported nocturia Mean improvement in nocturia score (1.0) significantly inferior to improvements for all other IPSS symptoms Patients scoring ≥2 before TURP Patients scoring ≥2 after TURP Rate of response (%) Emptying 102 27 54.3 Voiding frequency 116 63 38.4 Intermittency 101 33 49.3 Urgency 103 70 37.0 Weak stream 122 35 63.0 Hesitancy 84 18 47.8 Nocturia 118 91 19.6 Yoshimura et al. Urology 2003;61:786–790

31 Summary* 5 ARI : Little success
α (-) : Occ statistical, not clinically 5 ARI + α (-) : Same as α - blocker Antimuscarinics : Some statistical, minimal clinical AntiM + α (-) : Some statistical, minimal clinical Optimal group: Large # N episodes, most due to severe urgency, no NP Likely that other types of therapy will be necessary to achieve a clinically significant reduction in nocturia * AJ Wein MD

32 Nocturia: Classification
Nocturnal polyuria (NP) Diminished global/nocturnal capacity (NBC) Mixed (NP +  NBC) Polyuria

33 “Mixed” Nocturia etiology
Review of 194 consecutive patients with nocturia 13 (7%) had NP, 111 (57%)  NBC, 70 (36%) had “mixed” etiology Forty-five (23%) also had polyuria NP = a significant component of nocturia in 43% of the patients Conclude: Etiology of nocturia multifactorial and often unrelated to underlying urologic condition Weiss JP, Stember DS and Blaivas JG: Nocturia in adults: Classification and etiology. Neurourol Urodyn 16:401, 1997

34 Nocturia: Classification
Nocturnal polyuria (NP) Diminished global/nocturnal bladder capacity (NBC) Mixed (NP +  NBC) Polyuria

35 Polyuria Polyuria (24 hr urine output > 40 ml/kg)
Once steady state is reached polyuria is associated with excessive oral intake (polydipsia) Results in both day and night urinary frequency due to global urine overproduction in excess of bladder capacity

36 Common Causes of Polyuria
Diabetes mellitus Diabetes insipidus Polydipsia: Primary thirst disorder (dipsogenic, psychogenic)

37 Diabetes Insipidus (DI)
Disorder of water balance Inappropriate excretion of water leads to polydipsia to prevent circulatory collapse Central vs Nephrogenic

38 Central DI Deficient ADH synthesis or secretion
Causes: Loss of neurosecretory neurons in hypothalamus or posterior pituitary gland

39 Nephrogenic DI ADH secretion normal
Kidneys are non-responsive (eg chronic renal failure)

40 Polyuria: Diagnostic algorithm
Overnight water deprivation (OWD) If normal, DDx is polydipsia, either dipsogenic or psychogenic If OWD is abnormal, do renal concentrating capacity test (DDAVP) If RCCT normal, Dx = central DI: Tx with DDAVP If RCCT abnormal, Dx = nephrogenic DI: No specific treatment

41 Water deprivation test
No drinking overnight Normal: first AM urine osmolality > mOsm/kg H2O Normal means that there is normal AVP secretion and normal renal response

42 Renal Concentrating Capacity Test
40 mcg desmopressin intranasally (0.4 mg po) Bladder emptied; urine sample for osmolality obtained 3-5 hours later Water intake restricted for the first 12 hours after drug administration Normal > 800 mOsm/kg H2O

43 Normal water deprivation studies Dipsogenic vs. psychogenic
Primary polydipsia Normal water deprivation studies Dipsogenic vs. psychogenic Dipsogenic polydipsia associated with Hx central neurologic abnormality such as Hx of brain trauma, radiation Psychogenic polydipsia is long-term behavioral or psychiatric disorder

44 Polyuria: Treatment of Remediable Conditions
Reduce water intake in patients without DI Treat diabetes mellitus Vasopressin analogues in patients with central DI Psychotherapy for compulsive water drinkers

45 Antidiuretics: Indications
Antidiuretic hormone vasopressin is important for urinary concentration Antidiuretic therapy (desmopressin*) affects urine production. Proven benefit in treatment of polyuric conditions: Pituitary diabetes insipidus Primary nocturnal enuresis (PNE) Nocturia * vasopressin analogue

46 Desmopressin: mechanism of action
Desmopressin is a selective V2-receptor agonist: Retains antidiuretic properties of vasopressin1 Lacks unwanted pressor activity of vasopressin Desmopressin, when bound to V2-receptors in kidney: Increases tubular water permeability Enhances water reabsorption Extracellular fluid = more dilute Urine = more concentrated2 ICI and EAU recommendations added. Recommendation references: In Abrams et al. (eds) Incontinence; 4th International Consultation on Incontinence. Paris: Health Publication Ltd, 2009 2010 EAU nocturia guideline (part of "Guidelines on Conservative Treatment of Non-neurogenic Male LUTS", desmopressin is featured in section 3.5). Recommendations for desmopressin in nocturia: ICI: Grade A (Level 1 evidence); EAU: Grade A (Level 1b evidence) References 1. Vilhardt H. Drug Investigation 1990; 2(Suppl. 5):2–8. 2. Hammer M and Vilhardt H. J Pharmacol Exp Ther 1985; 234(3):754–760.

47 Desmopressin formulations
Intranasal: 10 mcg/spray; Max 40 mcg/day (CDI indication only) Oral: 0.1 mg tablets; Max 0.6 mg/day for PNE Melt: 60, 120, 240 mcg melt tabs Melt in development: 25 mcg (women) and mcg (men) New doses added

48 Ferring US Nocdurna Study Results – All Subjects
Pbo N=156 10 μg N=155 25 μg N=152 50 μg N=148 100 μg N=146 Change from baseline -0.86 -0.83 -1.00 -1.18 -1.43 33% Responders 47% 50% 53% 71% HN < 130 mmol/L 1 2 5 9 17 HN < 125 mmol/L 4 First sleep (min) 39 51 83 85 107 ΔNoct diurese (ml) -109 -164 -224 -272 -312 48

49 Summary of recommendations for potential desmopressin patients
All patients – use voiding diary Global polyuria – exclude for further evaluation Low volume per void and no nocturnal polyuria – other Rx? ? Dosing differential between genders Baseline sodium a good idea Where does pediatric ”no need” to check Na+ end and adult ”need” begin? Elderly (>65 years) with nocturnal polyuria All need baseline serum sodium Closely monitor serum sodium at 4 and 28 days after starting therapy or increasing dose Monitor fluid intake Use judgment: It’s always OK to check serum Na if you think it’s necessary

50

51 Nocturia: Future Considerations
Outcome studies Behavioral modification Stockings Targeted therapy ? Desmopressin for nocturnal polyuria ? Antimuscarinics for nocturnal urgency Treatment of Nocturia irrespective of bother? Is nocturia itself morbid or just a symptom of a morbid underlying condition? Analagous to HTN Hypercholesterolemia

52 Nocturia: Discussion/Questions


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