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Central European Journal of Urology 2020Desmopressin is an effective and safe therapy for nocturia caused by nocturnal polyuria. However, many physicians are unsure about the proper diagnosis of nocturnal... (Review)
Review
INTRODUCTION
Desmopressin is an effective and safe therapy for nocturia caused by nocturnal polyuria. However, many physicians are unsure about the proper diagnosis of nocturnal polyuria and the identification of patients who may benefit from desmopressin treatment. Therefore, to support urologists in their routine clinical practice, the aim of this study was to provide a comprehensive paradigm for diagnosing nocturnal polyuria with recommendations for the use of desmopressin.
MATERIAL AND METHODS
A multidisciplinary group of experts reviewed the available literature. Findings were compiled into a practice-based approach for workup and treatment.
RESULTS
We designed the nocturia diagnostic pathway to confirm nocturnal polyuria, identify possible causes of nocturnal polyuria, and classify patients with indications and contraindications for desmopressin therapy. A bladder diary remains a basic diagnostic tool. Underlying conditions that may lead to nocturnal polyuria include mainly cardiac insufficiency, arterial hypertension, chronic kidney failure, obstructive sleep apnea, peripheral edema, and excessive fluid intake at night. Treatment for nocturia caused by nocturnal polyuria is based on conservative management and pharmacotherapy, but pharmacological treatment should not precede a prior attempt at conservative treatment. Before administration of desmopressin, patients should be assessed for serum sodium concentration and carefully educated about the symptoms of hyponatremia. Older individuals or persons with risk factors for the development of hyponatremia should be checked regularly for hyponatremia during desmopressin therapy.
CONCLUSIONS
People with nocturia due to nocturnal polyuria should be evaluated carefully before initiating desmopressin treatment. Patients treated with desmopressin should be followed for both clinical efficacy and treatment-related adverse effects.
PubMed: 33552576
DOI: 10.5173/ceju.2020.0283 -
Journal of the American Society of... Nov 2022Ureteral obstruction is marked by disappearance of the vasopressin-dependent water channel aquaporin-2 (AQP2) in the renal collecting duct and polyuria upon reversal....
BACKGROUND
Ureteral obstruction is marked by disappearance of the vasopressin-dependent water channel aquaporin-2 (AQP2) in the renal collecting duct and polyuria upon reversal. Most studies of unilateral ureteral obstruction (UUO) models have examined late time points, obscuring the early signals that trigger loss of AQP2.
METHODS
We performed RNA-Seq on microdissected rat cortical collecting ducts (CCDs) to identify early signaling pathways after establishment of UUO.
RESULTS
Vasopressin V2 receptor (AVPR2) mRNA was decreased 3 hours after UUO, identifying one cause of AQP2 loss. Collecting duct principal cell differentiation markers were lost, including many not regulated by vasopressin. Immediate early genes in CCDs were widely induced 3 hours after UUO, including , , and (confirmed at the protein level). Simultaneously, expression of NF-κB signaling response genes known to repress increased. RNA-Seq for CCDs at an even earlier time point (30 minutes) showed widespread mRNA loss, indicating a "stunned" profile. Immunocytochemical labeling of markers of mRNA-degrading P-bodies DDX6 and 4E-T indicated an increase in P-body formation within 30 minutes.
CONCLUSIONS
Immediately after establishment of UUO, collecting ducts manifest a stunned state with broad disappearance of mRNAs. Within 3 hours, there is upregulation of immediate early and inflammatory genes and disappearance of the V2 vasopressin receptor, resulting in loss of AQP2 (confirmed by lipopolysaccharide administration). The inflammatory response seen rapidly after UUO establishment may be relevant to both UUO-induced polyuria and long-term development of fibrosis in UUO kidneys.
Topics: Rats; Animals; Aquaporin 2; Ureteral Obstruction; Polyuria; Kidney; Vasopressins; RNA, Messenger; Kidney Tubules, Collecting
PubMed: 35918145
DOI: 10.1681/ASN.2022050601 -
BMC Veterinary Research Jul 2023Corticosteroids are widely used with low rates of reported side effects and a broad level of comfort in the hands of most veterinarians. With a low side effect reporting...
BACKGROUND
Corticosteroids are widely used with low rates of reported side effects and a broad level of comfort in the hands of most veterinarians. With a low side effect reporting level of < 5% and high level of comfort there may be complacency and underestimation of the impact side effects of corticosteroids may have on a pet and pet owner.
OBJECTIVE
The objective of this clinical study was to describe the experience and perception of an owner who administered anti-inflammatory doses of oral prednisolone and prednisone to their dog for up to 14 days. We hypothesized dogs receiving anti-inflammatory doses of prednisone and prednisolone would experience much greater rates of side effects by day 14 then reported in current literature.
ANIMALS
There were 45 dogs initially enrolled in the study.
RESULTS
At each study point, 31 owners provided results. On day 5, 74% (23/31) reported at least 1 change in their dog's behavior including polyuria, polydipsia, polyphagia, polypnea and/or increased vocalization, with 11 individuals (35%) reporting these changes greatly increased. On day 14, 90% of owners (28/31) reported at least 1 change in their dog's behavior including polyuria, polydipsia, polyphagia, and/or polypnea as the most common changes noted. Overall, 61% (19/31) of owners reported an increase in filling of the water bowl over baseline and one-third (11/31) of pet owners reported cleaning up urinary accidents for pets who had been continent prior to the start of the study. Pet owner steroid satisfaction remained high through day 14 at 4.5/5 (1 = very unsatisfied, 5 = very satisfied).
CONCLUSION
This study highlights the impact short term anti-inflammatory doses of prednisone or prednisolone have on dog behaviour and confirms our hypothesis that by day 14, 90% of dogs experienced one or more behaviour changes, with polyuria and polydipsia most commonly reported. Adverse events were noted regardless of starting dosage or regimen. Although most pet owners expressed satisfaction with steroid treatment due to its high efficacy, 70% would select a more costly treatment if that treatment had fewer side effects.
Topics: Dogs; Animals; Prednisolone; Prednisone; Polyuria; Drug-Related Side Effects and Adverse Reactions; Hyperphagia; Polydipsia; Perception; Dog Diseases
PubMed: 37488543
DOI: 10.1186/s12917-023-03644-x -
Journal of Pediatric Urology Feb 2023Nocturnal enuresis (NE) is common in children, but its pathophysiology is still not fully understood. Despite the recognition of three major pathways, nocturnal... (Review)
Review
INTRODUCTION
Nocturnal enuresis (NE) is common in children, but its pathophysiology is still not fully understood. Despite the recognition of three major pathways, nocturnal polyuria, nocturnal bladder dysfunction and sleep disorders, their inter-relations remain elusive. The autonomic nervous system (ANS) which is greatly involved in both diuresis and sleep might have an important role in NE.
METHODS
A comprehensive electronic search of Medline database was performed, to identify articles reporting on the role of the autonomic nervous system (ANS) in enuretic children regarding sleep regulation, cardiovascular function and diuresis-related hormones and neurotransmitters.
RESULTS
Of an initial total of 646 articles, 45 studies were finally selected for data extraction according to inclusion criteria, published between 1960 and 2022. Of these studies 26 reported on sleep regulation, 10 on cardiovascular functions and 12 on ANS-associated hormones and neurotransmitters. Evidence on parasympathetic or sympathetic overstimulation in enuretic individuals is suggesting that NE could be attributed to a dysregulation of ANS. Sleep studies have shown increased rapid eye movement sleep time in polyuric enuretic children pointing to sympathetic overactivity, whereas patients with overactive bladder have non-rapid eye movement related enuretic episodes, potentially associated with parasympathetic stimulation. Twenty-four-hour blood pressure monitoring demonstrated "non-dipping" phenomenon, suggesting sympathetic involvement, whereas heart-rate analysis showed parasympathetic hyperfunction. Nocturnal lower levels of arginine-vasopressin, angiotensin II and aldosterone in polyuric children with NE as compared to non-polyuric and controls and potential involvement of dopamine and serotonin in sleep and micturition suggest that ANS-associated hormones and neurotransmitters have a role in the pathogenesis of NE.
CONCLUSION
Summarizing the existing data we suggest that ANS dysregulation related either with sympathetic or parasympathetic overactivity may provide a unifying model in understanding the pathogenesis of NE in different enuretic subpopulations. This observation provides new insights in future research and new potential treatment options.
Topics: Child; Humans; Nocturnal Enuresis; Autonomic Nervous System; Primary Dysautonomias; Polyuria; Sleep
PubMed: 37310191
DOI: 10.1016/j.jpurol.2022.10.015 -
Nature Reviews. Endocrinology May 2024Polyuria-polydipsia syndrome can be caused by central diabetes insipidus, nephrogenic diabetes insipidus or primary polydipsia. To avoid confusion with diabetes... (Review)
Review
Polyuria-polydipsia syndrome can be caused by central diabetes insipidus, nephrogenic diabetes insipidus or primary polydipsia. To avoid confusion with diabetes mellitus, the name 'central diabetes insipidus' was changed in 2022 to arginine vasopressin (AVP) deficiency and 'nephrogenic diabetes insipidus' was renamed as AVP resistance. To differentiate the three entities, various osmotic and non-osmotic copeptin-based stimulation tests have been introduced in the past decade. The hypertonic saline test plus plasma copeptin measurement emerged as the test with highest diagnostic accuracy, replacing the water deprivation test as the gold standard in differential diagnosis of the polyuria-polydipsia syndrome. The mainstay of treatment for AVP deficiency is AVP replacement with desmopressin, a synthetic analogue of AVP specific for AVP receptor 2 (AVPR2), which usually leads to rapid improvements in polyuria and polydipsia. The main adverse effect of desmopressin is dilutional hyponatraemia, which can be reduced by regularly performing the so-called desmopressin escape method. Evidence from the past few years suggests an additional oxytocin deficiency in patients with AVP deficiency. This potential deficiency should be further evaluated in future studies, including feasible provocation tests for clinical practice and interventional trials with oxytocin substitution.
PubMed: 38693275
DOI: 10.1038/s41574-024-00985-x -
La Revue de Medecine Interne May 2023Post-Obstructive Diuresis (POD) is a polyuria that occurs following the release of an obstruction from the urinary tract that prevents the flow of urine. POD requires... (Review)
Review
Post-Obstructive Diuresis (POD) is a polyuria that occurs following the release of an obstruction from the urinary tract that prevents the flow of urine. POD requires prompt diagnosis to avoid complications. Although its pathophysiology is better understood, there is little scientific evidence for its treatment. Restoration of renal homeostasis requires correction of blood volume and electrolyte disturbances to prevent complications, which can be serious. In this article, we propose a synthesis of knowledge on the subject, as well as a management strategy.
Topics: Humans; Diuresis; Kidney; Polyuria; Physicians
PubMed: 36764894
DOI: 10.1016/j.revmed.2023.01.011 -
Neurourology and Urodynamics Apr 2023The aim of this study was to compare the clinical characteristics of men with lower urinary tract symptoms (LUTS) grouped by 24-h urine output determined from a...
AIMS
The aim of this study was to compare the clinical characteristics of men with lower urinary tract symptoms (LUTS) grouped by 24-h urine output determined from a bladder voiding diary.
METHODS
An online database was queried to identify men who completed a 24-hour bladder diary (24HBD), and the Lower Urinary Tract Symptom Score (LUTSS) questionnaire from 2015 to 2019 using a mobile app. Data from the bladder diary and questionnaire were contemporaneously matched within a 2-week period. Additional data, including maximum uroflow (Q ) and postvoid residual urine (PVR), were obtained from the electronic medical record (EMR). The cohort was divided into three groups: normal, oliguria, and polyuria based on their 24-hour voided volume (24HVV). The LUTSS, 24HVV, maximum voided volume (MVV), maximum flow rate (Q ), and PVR were compared between those with oliguria and polyuria.
RESULTS
A total of 327 men (mean age 62, SD: 19) completed the LUTSS questionnaire and contemporaneous 24HBD. Of these, 61% had a normal 24HVV, 13% had oliguria, and 26% had polyuria. A total of 147 patients from the study cohort had contemporaneous Q and PVR abstracted from the EMR. There was no difference in symptom severity, bother, or PVR among the three patient groups. However, several objective metrics were significantly correlated with urine output. Men with oliguria, as compared to men with polyuria were older (65 vs. 55 years) and had lower MVV (260 vs. 470 mL), fewer voids/24 h (8 vs. 13), and lower Q (8.5 vs. 18.3 mL/s).
CONCLUSIONS
These observations suggest that men with oliguria or polyuria and LUTS constitute easily distinguished phenotypes that might require different diagnostic and therapeutic algorithms. Those with oliguria were older, and had lower MVVs and much lower uroflows, suggesting that they are more likely to have underlying disorders such as bladder outlet obstruction and detrusor underactivity or may be patients with overactive bladder who reduced fluid intake to improve symptoms.
Topics: Humans; Urinary Bladder; Polyuria; Oliguria; Urodynamics; Lower Urinary Tract Symptoms; Urinary Retention
PubMed: 36825401
DOI: 10.1002/nau.25164 -
Pediatrics International : Official... Nov 2021
Topics: Antidiuretic Agents; Deamino Arginine Vasopressin; Humans; Nocturnal Enuresis; Polyuria
PubMed: 34792829
DOI: 10.1111/ped.14876 -
International Urogynecology Journal May 2021Nocturia, defined as the act of waking to pass urine during sleeping, is a common problem in older women and is associated with significant morbidity and impairments in... (Review)
Review
INTRODUCTION AND HYPOTHESIS
Nocturia, defined as the act of waking to pass urine during sleeping, is a common problem in older women and is associated with significant morbidity and impairments in health-related quality of life. The aim of this review was to synthesize the current evidence regarding the incidence, impact, pathophysiology, and specific diagnostic approach of nocturia in the postmenopausal population.
METHODS
We searched PubMed and Web of Science databases to identify relevant studies published through June 2020. Reference lists of the reviews obtained were screened for other articles deemed pertinent by the authors.
RESULTS
Genitourinary symptoms attributed to the menopause have been reported to occur in nearly 90% of postmenopausal women, and nocturia is one of the most common. The relative deficiency in endogenous estrogen production after the menopause is thought to exacerbate all major pathophysiological mechanisms that may underlie nocturia, including reduced bladder capacity, nocturnal polyuria, global polyuria, and sleep disorders. Diminished estrogen may induce anatomical and physiological bladder changes, contributing to a reduction in functional bladder capacity. Excess nocturnal urine production can also be provoked by estrogen depletion, either via free water-predominant diuresis by an impaired secretion of antidiuretic hormone, or a salt-predominant diuresis owing to diminished activation of the renin-angiotensin-aldosterone axis. Additionally, a relationship between the transition to menopause and impaired sleep has been described, mediated by increased incidence in vasomotor symptoms and obstructive sleep apnea signs during the menopause.
CONCLUSION
Further research is necessary to better characterize and manage nocturia in postmenopausal women.
Topics: Aged; Diuresis; Female; Humans; Menopause; Nocturia; Polyuria; Quality of Life
PubMed: 33439278
DOI: 10.1007/s00192-020-04640-7 -
Frontiers in Endocrinology 2022Water and electrolyte disturbances are common after pituitary surgery and can generally be classified into transient hypotonic polyuria and transient or permanent... (Observational Study)
Observational Study
INTRODUCTION
Water and electrolyte disturbances are common after pituitary surgery and can generally be classified into transient hypotonic polyuria and transient or permanent diabetes insipidus (DI). The prevalence varies in the literature between 31-51% for transient hypotonic polyuria, 5.1-25.2% for transient DI, and 1-8.8% for permanent DI.
OBJECTIVE
The aim of this study was to identify the prevalence of water and electrolyte disturbances with polyuria and the preoperative and postoperative predictive factors in patients undergoing surgery with an extended endoscopic endonasal approach.
MATERIAL AND METHODS
This retrospective observational descriptive study included 203 patients with a diagnosis of pituitary adenoma who underwent their first transsphenoidal surgery the extended endoscopic endonasal approach between April 2013 and February 2020. The diagnosis of water and electrolyte disturbances was based on the criterion for polyuria (>4 ml/kg/h). Postoperative polyuria was defined as those cases diagnosed during the immediate postsurgical period that resolved prior to discharge. Transient DI included all cases with a duration of less than 6 months but still present at hospital discharge, and permanent DI included cases lasting more than 6 months.
RESULTS
The overall prevalence of water and electrolyte disorders was 30.5% (62), and the prevalence of postoperative polyuria was 23.6% (48). The median number of desmopressin doses administered to patients with postoperative polyuria was one dose (interquartile range [IQR] 1-2), and thus the median duration of treatment was 0 days. The median initiation of desmopressin was the second day after surgery (IQR 1-2). The overall prevalence of DI was 6.89%. Among the patients with transient DI, the duration was less than 3 months in three patients (1.47%), and between 3 and 6 months in two (0.98%). Nine patients had permanent DI (4.43%). (4.43%).
CONCLUSIONS
The prevalence of electrolyte disturbances in our study was high, although similar to that found in the literature. Most of the cases were transient hypotonic polyuria that resolved within one day. The prevalence of transient DI in our cohort was lower than that described in the literature, while permanent DI was similar.
Topics: Deamino Arginine Vasopressin; Diabetes Insipidus; Humans; Pituitary Neoplasms; Polyuria; Postoperative Complications; Retrospective Studies; Water-Electrolyte Imbalance
PubMed: 36082073
DOI: 10.3389/fendo.2022.963707