Podcast
Questions and Answers
What is the most common cause of ureteric colic?
What is the most common cause of ureteric colic?
A ureteral stone is the most common cause of ureteric colic.
Describe the pain associated with acute urine retention.
Describe the pain associated with acute urine retention.
The pain is severe and bursting, felt in the suprapubic area due to over-distension of the bladder.
How does renal pain typically present and where is it felt?
How does renal pain typically present and where is it felt?
Renal pain is dull, aching, and steady, felt in the posterior renal angle, and may radiate toward the umbilicus.
What differentiates ureteral colic from pain due to intraperitoneal pathology?
What differentiates ureteral colic from pain due to intraperitoneal pathology?
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What symptoms are typically associated with cystitis?
What symptoms are typically associated with cystitis?
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Where is prostate pain generally localized and where can it be referred?
Where is prostate pain generally localized and where can it be referred?
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What is the typical characteristic of pain in cases of acute inflammation of the genitourinary tract?
What is the typical characteristic of pain in cases of acute inflammation of the genitourinary tract?
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What is referred pain, and how is it associated with genitourinary symptoms?
What is referred pain, and how is it associated with genitourinary symptoms?
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What are the primary symptoms associated with acute prostatitis?
What are the primary symptoms associated with acute prostatitis?
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Identify possible causes of penile pain.
Identify possible causes of penile pain.
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Differentiate between uralgia and voiding difficulty.
Differentiate between uralgia and voiding difficulty.
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What conditions can lead to urinary retention?
What conditions can lead to urinary retention?
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List the symptoms that may indicate outflow obstruction.
List the symptoms that may indicate outflow obstruction.
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What is the definition of polyuria and its potential causes?
What is the definition of polyuria and its potential causes?
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What should be considered in patients presenting with testicular pain but normal scrotal examination?
What should be considered in patients presenting with testicular pain but normal scrotal examination?
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What are common causes of dysuria?
What are common causes of dysuria?
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Study Notes
Clinical Chemistry Case Study Notes
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The case study focuses on genitourinary symptoms and diabetes mellitus.
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Genitourinary symptoms can arise from obstruction or inflammation within the genitourinary tract.
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Referred pain is a common symptom.
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Inflammation of the parenchyma (e.g., pyelonephritis, prostatitis, epididymo-orchitis) leads to severe pain and fever.
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Tumors generally do not cause pain unless causing obstruction.
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Renal pain (flank pain) is visceral pain resulting from urine flow obstruction or distension of collecting system/renal capsule.
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Pain due to inflammation is typically dull, aching, and steady.
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Renal pain is felt in the posterior renal (costo-vertebral) angle, below the last rib.
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Pain can radiate anteriorly toward the umbilicus.
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Ureteral colic, a common cause of ureteral stone, is a severe, colicky, intermittent pain occurring in waves.
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Patients with ureteral colic often move around in pain and hold their flank.
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Ureteral colic is often accompanied by renal pain due to distension of the renal pelvis.
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Pain originating at the costo-vertebral angle radiates around the trunk into the lower quadrant of the abdomen or possibly into the anterior aspect of the upper thigh.
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Bladder pain can manifest as acute urine retention (difficulty urinating despite desire), with severe bursting pain in the suprapubic area.
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A full and over-distended bladder is a result of complete obstruction.
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Chronic retention is painless, with dribbling as overflow incontinence.
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Cystitis causes suprapubic burning pain.
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Prostate pain is due to acute inflammation, localized in the perineum and referred to the lower back and rectum.
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Acute prostatitis is associated with fever, frequency, dysuria, or acute retention and tenesmus.
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Urethral pain presents as burning during micturition, often due to inflammation or a stone.
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Testicular pain is primarily due to acute epididymo-orchitis, testicular torsion, or trauma.
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Renal or ureteric colic can cause referred testicular pain.
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Hydrocele, varicocele, and testicular tumors can also cause scrotal discomfort.
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Penile pain may be related to bladder or urethral inflammation or a stone.
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Priapism is painful, persistent, purposeless penile erection, resulting from sickle cell disease, pelvic tumors, infections, genital trauma, spinal cord trauma, or medications (e.g., alprostadil, fluoxetine, prazosin, clozapine, warfarin, heparin).
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Dysuria refers to painful urination, often due to urethral, bladder, or vaginal inflammation (e.g., UTI, prostatitis, STDs/urethritis, vaginitis, vulvitis, stones, urethral lesions).
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Difficulty voiding is a sign of outflow obstruction (e.g., enlarged prostate, urethral stricture).
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Other outflow obstruction features include straining to void, poor stream, urinary retention, incontinence, and hesitancy to start urination.
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Increased urine production (polyuria) should be differentiated from frequent passage of small amounts of urine.
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Polyuria (>3L/24h) can be caused by over-enthusiastic IV fluid therapy, diabetes mellitus, insipidus, hypercalcemia, psychogenic polydipsia, and recovering acute tubular necrosis.
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Oliguria (<400mL/24h or <0.5mL/kg/hour) can indicate shock or acute kidney injury.
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Anuria (<50mL/24h) in a catheterized patient with sudden onset may indicate catheter blockage or renal dysfunction.
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Cloudy urine may indicate pus (UTI), but can also be normal phosphate precipitation in alkaline urine.
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Pneumaturia (bubbles in urine) can occur with gas-forming organisms in a UTI or from fistulas/bowel neoplasms (e.g., diverticulitis, Crohn's disease).
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Nocturia is increased urination at night, often associated with bladder irritability, diabetes mellitus, or a UTI.
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Haematuria (blood in urine) is due to neoplasia or glomerulonephritis unless otherwise specified.
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Normal vaginal discharge varies with the menstrual cycle.
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Bacterial vaginosis is characterized by profuse and fishy-smelling discharge without itch or soreness.
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Vulvovaginal candidiasis results in vulval itch, soreness, and thick white non-offensive discharge.
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Trichomonas vaginalis causes an offensive, yellow, profuse, and frothy vaginal discharge, often associated with vulval itch, soreness, dysuria, and superficial dyspareunia.
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Discharge with any of the above organisms may be asymptomatic.
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Menstrual history (frequency, regularity, heaviness, pain, last period, number of pregnancies and births, menarche, menopause) and any chance of current pregnancy are important factors.
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Past history should include renal colic, urinary tract infection, diabetes, hypertension, gout, analgesic use, and previous operations.
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Drug history should note any anticholinergics.
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Family history should note any prostate carcinoma and renal disease.
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Social history should consider smoking and sexual history.
Diabetes Mellitus (DM) Notes
- Diabetes mellitus is a group of metabolic disorders characterized by hyperglycemia.
- Etiology is a complex interaction of genetics and environmental factors.
- Contributing factors to hyperglycemia vary depending on etiology, including reduced insulin secretion and decreased glucose utilization, as well as increased glucose production.
- Clinical features include hyperglycemia leading to polyuria (increased urine production), glycosuria (glucose in urine), polydipsia (increased thirst), polyphagia (increased hunger), and weight loss.
- Complete medical history is important, with special emphasis on weight, exercise, family history of DM, and risk factors for cardiovascular disease.
- HbA1c, self-monitoring of blood glucose, and patient knowledge of DM, including frequency of hypoglycemia, should be obtained.
- Physical exam should include retinal exam, blood pressure, and urine analysis (including foot exam).
- DM causes complications in multiple organ systems, including end-stage renal disease, non-traumatic lower extremity amputations, and adult blindness.
- DM predisposes to cardiovascular diseases and will likely be a leading cause of morbidity and mortality in the future.
- Acute complications can include diabetic ketoacidosis (DKA) and hyperglycemic hyperosmolar state (HHS).
- Chronic complications include ophthalmologic (retinopathy, macular edema), renal (proteinuria, ESRD, renal tubular acidosis), neurologic (symmetric polyneuropathy, mononeuropathy, autonomic neuropathy), gastrointestinal (gastroparesis, diarrhea, constipation), and genitourinary (cystopathy, erectile dysfunction, female sexual dysfunction).
Type 1 Diabetes Mellitus (DM) Notes
- Type 1 DM is a metabolic condition where autoimmune destruction of pancreatic beta cells results in insulin deficiency.
- Characterized by hyperglycemia, breakdown of fats and proteins, leading to ketosis.
- Accounts for 5-10% of cases, commonly developing before 20 years old.
- Risk factors include genetic predisposition (HLA linkage DR3/DR4 haplotype) and various environmental triggers, like viral infections (mumps, rubella, coxsackievirus B4), chemical toxins (nitrosourea compounds), and bovine milk proteins.
- Autoimmune beta cell destruction triggered by environmental factors. Some individuals may lack immunologic markers indicative of autoimmune and non-immune (idiopathic) mechanisms.
- Individuals with genetic susceptibility may have normal beta cell mass at birth, but subsequent autoimmune destruction occurs over time.
- Beta-cell mass decrease leads to progressive insulin secretion decline, with variable rates amongst individuals. Clinical diabetes becomes apparent after most beta cells are destroyed (70-80%).
- Transition to frank diabetes is often linked to increased insulin requirements during infections or puberty. Alpha cells are spared, continuing glucagon production contributing to hyperglycemia.
- Islet cell autoantibodies (ICAs) are useful in classifying as type 1 and identifying those at risk.
- Diagnosis includes random/non-fasting glucose ≥200 mg/dL or fasting glucose ≥126 mg/dL.
Type 2 Diabetes Mellitus (DM) Notes
- Type 2 DM is characterized by fasting hyperglycemia despite the presence of the body's own insulin.
- It's not solely insulin dependent and can be found in children.
- Pathophysiology is characterized by impaired insulin secretion, insulin resistance, excessive hepatic glucose production, and abnormal fat metabolism.
- Sufficient insulin production prevents DKA, but may be insufficient for normal blood glucose uptake.
- Risk factors include a history of diabetes in parents/siblings, obesity (especially upper body), physical inactivity, ethnicity (African American, Hispanic, Asian, or American Indian origin), women with GDM or PCOS, delivered baby with birth weight >9 pounds, a history of hypertension, high cholesterol (>35mg/dL), and high triglyceride (>250 mg/dL), and a history of cardiovascular disease.
- Testing includes HbA1c ≥6.5% (48 mmol/mol), fasting plasma glucose (FPG) ≥126 mg/dL (7.0 mmol/L), 2-hour plasma glucose (2-h PG) ≥200 mg/dL (11.1 mmol/L) during a 75-g oral glucose tolerance test (OGTT), or a random plasma glucose (RPG) ≥200 mg/dL (11.1 mmol/L) in symptomatic individuals.
Increased Risk Categories for Diabetes (Prediabetes)
- These include impaired fasting glucose (IFG) (FBG 100-125mg/dL), impaired glucose tolerance (IGT) (2h-PG 140-199mg/dL) with associated Hb A1C 5.7-6.4%. These categories put those at increased risk for diabetes and vascular disease in the future.
Screening for Diabetes
- Screening is recommended every three years for those over 45, overweight, or have additional diabetes risk factors. Children and adolescents may also require screening given similar risk factors (overweight and obesity present, or have two or more risk factors).
Diabetic Ketoacidosis (DKA) and Hyperglycemic Hyperosmolar State (HHS)
- DKA and HHS are acute complications of diabetes.
- DKA is primarily associated with type 1 DM, HHS with type 2 DM.
- Both are characterized by relative/absolute insulin deficiency, volume depletion, and altered mental status.
- DKA presents with symptoms like nausea, vomiting, thirst, polyuria, abdominal pain, and shortness of breath. Physical findings may include tachycardia, dehydration/hypotension, Kussmaul respirations, abdominal tenderness, lethargy/obtundation, possible coma, etc.
- HHS presents with polyuria, thirst, altered mental status (ranging from lethargy to coma), absent nausea/vomiting/abdominal pain, and lack of/mild Kussmaul respirations.
- DKA and HHS have distinct laboratory values, which can differentiate these conditions.
Gestational Diabetes Mellitus (GDM)
- Glucose intolerance developing during pregnancy.
- Insulin resistance related to pregnancy and increased insulin requirements.
- Occurs in ~7% of pregnancies in the USA.
- Increased risk of developing type 2 DM.
- Specific screening, diagnostic approach, and blood glucose levels exist for GDM.
Monogenic Diabetes Syndromes
- Monogenic defects causing Beta-cell dysfunction.
- Includes neonatal diabetes and Maturity-Onset Diabetes of the Young (MODY).
- A rare subgroup of diabetes marked by early-onset hyperglycemia (generally <25 years).
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Description
Test your knowledge on the causes and characteristics of pain associated with various conditions of the genitourinary system. This quiz covers topics such as ureteric colic, prostatitis, cystitis, and urinary retention. Evaluate your understanding of symptoms and differentiation between similar conditions.