Diagnostic Tests for Kidney stones
Kidney stones: Diagnostic Tests
The list of diagnostic tests
mentioned in various sources as
used in the diagnosis of Kidney stones
includes:
Kidney stones Tests: Book Excerpts
Home Diagnostic Testing
These home medical tests may be relevant to Kidney stones:
- Bladder & Urinary Health: Home Testing:
- Prostate Health: Home Testing:
- Kidney Health: Home Testing:
Kidney stones Diagnosis: Book Excerpts
Tests and diagnosis discussion for Kidney stones:
Kidney Stones in Adults: NIDDK (Excerpt)
Sometimes "silent" stones--those that do not
cause symptoms--are found on x-rays taken during a general health exam.
These stones would likely pass unnoticed.
More often, kidney stones are found on an x-ray or sonogram taken on
someone who complains of blood in the urine or sudden pain. These
diagnostic images give the doctor valuable information about the stone's
size and location. Blood and urine tests help detect any abnormal
substance that might promote stone formation.
The doctor may decide to scan the urinary system using a special x-ray
test called an IVP (intravenous pyelogram). The results of all these tests
help determine the proper treatment.
(Source: excerpt from Kidney Stones in Adults: NIDDK)
What Are Kidney Stones: NIDDK (Excerpt)
The best way for your doctor to find out what
kind of stone you have is to test the stone itself. If you know that you
are passing a stone, try to catch it in a strainer.
Your doctor may ask for a urine sample or take blood to find out what
is causing your stones. You may need to collect your urine for a 24-hour
period. These tests will help your doctor find ways for you to avoid
stones in the future.
(Source: excerpt from What Are Kidney Stones: NIDDK)
Kidney Stones: NWHIC (Excerpt)
The urologist will order
laboratory tests, including urine and blood tests. He or she will also ask
about the patient's medical history, occupation and dietary habits. If a
stone has been removed, or if the patient has passed a stone and saved it,
the lab can analyze the stone to determine its composition. (Source: excerpt from Kidney Stones: NWHIC)
Diagnosis of Kidney stones: medical news summaries:
The following medical news items
are relevant to diagnosis of Kidney stones:
Diagnostic Tests for Kidney stones: Online Medical Books
16 MEDICAL BOOKS ONLINE!
Review excerpts from medical books online, free, without registration,
for more information about the diagnostic tests for Kidney stones.
DYSURIA:
DIAGNOSTIC WORKUP
(Algorithmic Diagnosis of Symptoms and Signs)
Obviously, a urinalysis and Gram stain of the unspun urine should be done in all cases. If this is positive, treatment can be initiated. Urine cultures are only necessary for resistant or repeated episodes. I also recommend a urethral smear and a vaginal smear and culture if sufficient material can be obtained. This may mean massaging the prostate for an adequate specimen. Even four white cells per high-powered field on a urethral smear probably indicates urethritis. Cultures for both gonorrhea and chlamydia should be done. In persistent cases of dysuria, an intravenous pyelogram and a cystoscopy must be done. A urologist needs to be consulted before ordering these tests. Blood cultures should be done in cases of acute pyelonephritis. Cultures for anaerobic bacilli and tuberculosis may be necessary in persistent pyuria. It should go without saying that a rectal and vaginal examination should be done in all cases. However, this is frequently neglected.
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Source: Algorithmic Diagnosis of Symptoms and Signs, 2003
HEMATURIA:
DIAGNOSTIC WORKUP
(Algorithmic Diagnosis of Symptoms and Signs)
The workup begins with a urinalysis and microscopic examination of the urinary sediment. The physician can easily do this in his office. If there is proteinuria, granular cast, and red cell cast, glomerulonephritis or collagen disease should be suspected. A culture and sensitivity and colony count should be done if a UTI is suspected. A three-glass test may be done. If there is blood in the initial specimen, the cause is most likely in the urethra or male genitalia. If it is in the final specimen, the cause is most likely a bladder lesion. Phase-contrast microscopy may also be helpful in identifying hematuria from a glomerular lesion. If this is negative, an anaerobic culture should be done also and then an AFB smear and culture and guinea pig inoculation to rule out tuberculosis. An intravenous pyelogram will also usually have to be done. A CBC, sedimentation rate, chemistry panel, coagulation profile, and ANA test will help rule out blood dyscrasias, collagen diseases, and other systemic diseases. Ultrasonography may help diagnose a renal cyst.
If the above are not revealing, referral to a urologist is indicated. He will probably do a cystoscopy and retrograde pyelography. He may also want to order a CT scan of the abdomen and pelvis and a renal biopsy. Renal angiography and aortography may be necessary to evaluate renovascular hypertension and renal embolism.
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Source: Algorithmic Diagnosis of Symptoms and Signs, 2003
Bladder distention:
History and physical examination
(Handbook of Signs & Symptoms (Third Edition))
If distention isn't severe, begin by reviewing the patient's voiding patterns. Find out the time and amount of the patient's last voiding and the amount of fluid consumed since then. Ask if he has difficulty urinating. Does he use Valsalva's or Credé's maneuver to initiate urination? Does he urinate with urgency or without warning? Is urination painful or irritating? Ask about the force and continuity of his urine stream and whether he feels that his bladder is empty after voiding.
Explore the patient's history of urinary tract obstruction or infections; venereal disease; neurologic, intestinal, or pelvic surgery; lower abdominal or urinary tract trauma; and systemic or neurologic disorders. Note his drug history, including his use of over-the-counter drugs.
Take the patient's vital signs, and percuss and palpate the bladder. (Remember that if the bladder is empty, it can't be palpated through the abdominal wall.) Inspect the urethral meatus, and measure its diameter. Describe the appearance and amount of any discharge. Finally, test for perineal sensation and anal sphincter tone; in male patients, digitally examine the prostate gland.
» READ BOOK EXCERPT ONLINE »
Source: Handbook of Signs & Symptoms (Third Edition), 2006
Hematuria:
History and physical examination
(Handbook of Signs & Symptoms (Third Edition))
After detecting hematuria, take a pertinent health history. If hematuria is macroscopic, ask the patient when he first noticed blood in his urine. Does it vary in severity between voidings? Is it worse at the beginning, middle, or end of urination? Has it occurred before? Is the patient passing clots? To rule out artifactitious hematuria, ask about bleeding hemorrhoids or the onset of menses, if appropriate. Ask if there’s pain or burning with hematuria episodes.
Ask about recent abdominal or flank trauma. Has the patient been exercising strenuously? Note a history of renal, urinary, prostatic, or coagulation disorders. Then obtain a drug history, noting anticoagulants or aspirin.
Begin the physical examination by palpating and percussing the abdomen and flanks. Next, percuss the costovertebral angle (CVA) to elicit tenderness. Check the urinary meatus for bleeding or other abnormalities. Using a chemical reagent strip, test a urine specimen for protein. A vaginal or digital rectal examination may be necessary.
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Source: Handbook of Signs & Symptoms (Third Edition), 2006
Introduction: Renal and Urologic Disorders:
Clinical assessment
(Professional Guide to Diseases (Eighth Edition))
Assessment of the renal and urologic systems begins with an accurate patient history and requires a thorough physical examination and certain laboratory data and test results from invasive and noninvasive procedures. When obtaining a patient history, ask about symptoms that pertain specifically to the pathology of the renal and urologic systems, such as frequency or urgency, and about the presence of any systemic diseases that can produce renal or urologic dysfunction, such as hypertension, diabetes mellitus, or bladder infections. Family history may also suggest a genetic predisposition to certain renal diseases, such as glomerulonephritis or polycystic kidney disease. Also, ask what medications the patient has been taking; abuse of analgesics or antibiotics may cause nephrotoxicity.
Physical examination for renal disease
The first step in physical examination is careful observation of the patient’s overall appearance, because renal disease affects all body systems. Examine the patient’s skin for color, turgor, intactness, and texture; mucous membranes for color, secretions, odor, and intactness; eyes for periorbital edema and vision; general activity for motion, gait, and posture; muscle movement for motor function and general strength; and mental status for level of consciousness, orientation, and response to stimuli. (See Common renal symptoms.)
Renal disease causes distinctive changes in vital signs: hypertension due to fluid and electrolyte imbalances and hyperactivity of the renin-angiotensin system; a strong, fast, irregular pulse due to fluid and electrolyte imbalances; hyperventilation to compensate for metabolic acidosis; and an increased susceptibility to infection due to overall decreased resistance. Palpation and percussion may reveal little because the kidneys and bladder are difficult to palpate unless they are enlarged or distended.
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Source: Professional Guide to Diseases (Eighth Edition), 2005
Bladder distention:
History and physical examination
(Professional Guide to Signs & Symptoms (Fifth Edition))
If distention isn’t severe, begin by reviewing the patient’s voiding patterns. Find out the time and amount of the patient’s last voiding and the amount of fluid consumed since then. Ask if he has difficulty urinating. Does he use Valsalva’s or Credé’s maneuver to initiate urination? Does he urinate with urgency or without warning? Is urination painful or irritating? Ask about the force and continuity of his urine stream and whether he feels that his bladder is empty after voiding.
Explore the patient’s history of urinary tract obstruction or infections; venereal disease; neurologic, intestinal, or pelvic surgery; lower abdominal or urinary tract trauma; and systemic or neurologic disorders. Ask about his drug history, including his use of over-the-counter drugs.
Take the patient’s vital signs, and percuss and palpate the bladder. (Remember that if the bladder is empty, it can’t be palpated through the abdominal wall.) Inspect the urethral meatus, and measure its diameter. Describe the appearance and amount of any discharge. Finally, test for perineal sensation and anal sphincter tone; in male patients, digitally examine the prostate gland.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Signs & Symptoms (Fifth Edition), 2006
Dysuria:
History and physical examination
(Professional Guide to Signs & Symptoms (Fifth Edition))
If the patient complains of dysuria, have him describe its severity and location. When did he first notice it? Did anything precipitate it? Does anything aggravate or alleviate it?
Next, ask about previous urinary or genital tract infections. Has the patient recently undergone an invasive procedure, such as cystoscopy or urethral dilatation, or had a urinary catheter inserted? Also, ask if he has a history of intestinal disease. Ask the female patient about menstrual disorders and use of products that irritate the urinary tract, such as bubble bath salts, feminine deodorants, contraceptive gels, or perineal lotions. Also ask her about vaginal discharge or pruritus.
During the physical examination, inspect the urethral meatus for discharge, irritation, or other abnormalities. A pelvic or rectal examination may be necessary.
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Source: Professional Guide to Signs & Symptoms (Fifth Edition), 2006
Hematuria:
History and physical examination
(Professional Guide to Signs & Symptoms (Fifth Edition))
After detecting hematuria, take a pertinent health history. If hematuria is macroscopic, ask the patient when he first noticed blood in his urine. Does it vary in severity between voidings? Is it worse at the beginning, middle, or end of urination? Has it occurred before? Is the patient passing any clots? To rule out artifactual hematuria, ask about bleeding hemorrhoids or the onset of menses, if appropriate. Ask if pain or burning accompanies the episodes of hematuria.
Ask about recent abdominal or flank trauma. Has the patient been exercising strenuously? Note a history of renal, urinary, prostatic, or coagulation disorders. Then obtain a drug history, noting the use of anticoagulants or aspirin.
Begin the physical examination by palpating and percussing the abdomen and flanks. Next, percuss the costovertebral angle (CVA) to elicit tenderness. Check the urinary meatus for bleeding or other abnormalities. Using a chemical reagent strip, test a urine specimen for protein. A vaginal or digital rectal examination may be necessary.
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Source: Professional Guide to Signs & Symptoms (Fifth Edition), 2006
Dysuria:
Physical examination
(The 10-Minute Diagnosis Manual: Symptoms and Signs in the Time-Limited Encounter)
The physical examination is essential in narrowing the diagnosis. It helps to rule out pyelonephritis and other systemic infections in patients with dysuria, allowing the physician to search for the less severe causes. Fever, flank tenderness, and suprapubic tenderness are useful findings. A careful genital examination (speculum in women, foreskin retraction and prostate examination in uncircumcised men) can point to specific localized causes. The genital examination also allows collection of samples for testing. Attention to localized lesions (e.g., HSV lesions), discharge (yeast, bacterial vaginosis, gonorrhea, and trichomoniasis) and trauma also help make the diagnosis.
Testing
The history and physical examination usually suggests which tests are most appropriate. A urinalysis is the most common study performed. It is important also to gather samples for gonorrhea, chlamydia, and HSV, using wet preparations and potassium hydroxide testing when appropriate. Rapid tests on urine samples for the detection of bacteria and leukocytes can be done while patients wait. Direct microscopic examination of the urine can isolate bacteria and leukocytes. Rapid dipstick biochemical tests can isolate leukoesterase and nitrate, which are consistent with leukocytes and urea-fixing bacteria. Urine cultures require overnight to 48 hours of incubation to detect specific bacterial pathogens. Pyuria (defined as white blood cell count >10/mm3 of urine) is seen in more than 95% of patients with acute UTI but is uncommon in the absence of infection. Pyuria without bacteriuria suggests a chlamydia infection. Urine dipstick testing is generally less sensitive for pyuria than microscopic examination, but it is more convenient (5).
Diagnostic assessment
Given the many causes of dysuria, an accurate diagnosis can be difficult without a thorough approach to each patient. Because most causes have other associated symptoms and findings, a diagnosis can usually be made with a carefully taken history, a focused physical examination, and appropriate laboratory tests. Separating an uncomplicated UTI or STD from the more serious pyelonephritis and other possible diagnoses is the challenge in these patients.
References
1. Carlson KJ, Mulley AG. Management of acute dysuria. Ann Intern Med 1985;102:
244–249.
2. Johnson JR, Stamm WE. Diagnosis and treatment of acute urinary tract infections. Infect Dis Clin North Am 1987;4(1):773–791.
3. Ainsworth JG, Weaver T, Murphy S, Renton A. General practitioners’ immediate management of men presenting with urethral symptoms. Genitourin Med 1996;72(6):427–430.
4. Roberts RO, Lieber MM, Rhodes R, Girman CJ, Bostwick DG, Jacobsen SJ. Prevalence of a physician-assigned diagnosis of prostatitis: the Olmsted County Study of Urinary Symptoms and Health Status Among Men. Urology 1998;51(4):578–584.
5. Kurowiski K. The woman with dysuria. Am Fam Physician 1998;57(9):2155–2164, 2169–2170.
» READ BOOK EXCERPT ONLINE »
Source: The 10-Minute Diagnosis Manual: Symptoms and Signs in the Time-Limited Encounter, 2000
Hematuria:
Physical examination
(The 10-Minute Diagnosis Manual: Symptoms and Signs in the Time-Limited Encounter)
should focus on signs of systemic disease (fever, rash, lymphadenopathy, joint swelling, and abdominal or pelvic mass), and underlying medical or renal disease (hypertension, edema). Multiple telangiectasias and mucous membrane lesions indicate hereditary hemorrhagic telangiectasia (Rendu-Osler-Weber disease). An abdominal mass in children requires exclusion of Wilms tumor.
Testing
A. Initial evaluation. Hematuria is usually detected by dipstick or microscopic examination. The dipstick test relies on detecting hemoglobin and should always be confirmed by microscopic examination of the urine sediment. Some controversy exists about the abnormal number of red blood cells in urine. Most clinicians consider more than three to five red blood cells per high power field (40 × lens) as definitely abnormal. When dipstick testing is positive for blood but urine microscopy reveals no red blood cells, hemoglobinuria or myoglobinuria should be considered. The next step is a urine culture. Baseline blood tests include a renal panel, complete blood count with differential, sedimentation rate, prothrombin time, and partial thromboplastin time.
B. Further evaluation is highly dependent on the suspected cause. Further blood tests can include serum complement titer (significant if low), antistreptolysin-O titer (high), antinuclear antibody and extended panels with anti-deoxyribonuclease B titer (high), and hemoglobin electrophoresis. A tuberculin skin test or chest x-ray study can be done to detect tuberculosis. Further tests can include imaging studies and cytology. Intravenous pyelogram and abdominal and pelvic ultrasound or computed tomography scanning may detect malignancies of the various anatomic areas as well as benign conditions such as urolithiasis, obstructive uropathy, renal cysts, parenchymal abnormalities, and nonurinary tract lesions. To complete the workup, send the urine for cytology study and proceed with cystoscopy looking for abnormalities of the urethra and bladder. Biopsies of various areas, including kidney and bladder, and invasive vascular studies may be needed. Unless a diagnosis is made, patients will need referral to subspecialists.
Diagnostic assessment
The key to the diagnosis of hematuria is the clinical history and physical examination. Laboratory and imaging studies only confirm or rule out initial suspicions. The goal is to diagnose a variety of serious illnesses, including malignancies and renal parenchymal diseases. In general, keep in mind that transient hematuria, especially in a young person, is quite common and rarely indicative of significant pathology (4). When present in patients aged more than 50 years, however, transient hematuria always warrants a comprehensive evaluation to rule out malignancy. Similarly, a diagnostic workup should be performed when persistent hematuria is found in patients of any age.
References
1. Froom P, Ribak J, Benbassat J. The significance of microhematuria in young adults. BMJ 1984;288:20–28.
2. Mariani AJ, Mariani MC. The significance of adult hematuria: 1000 hematuria evaluations including a risk-benefit and cost-effectiveness analysis. J Urol 1989;
141:350–355.
3. Messing EM, Young TB, Hunt VB, et al. Hematuria home screening: repeat testing results. J Urol 1995;154(1):57–61.
4. Murakami S, Igarashi T, Hara S, et al. Strategies for asymptomatic microscopic hematuria: a prospective study of 1034 patients. J Urol 1990;144:99–106.
» READ BOOK EXCERPT ONLINE »
Source: The 10-Minute Diagnosis Manual: Symptoms and Signs in the Time-Limited Encounter, 2000
Dysuria:
Diagnostic Approach
(Field Guide to Bedside Diagnosis)
In women, ask whether burning is internal (urinary tract infection) or external (vaginitis). Women who have had a prior urinary tract infection are more than 90% accurate in identifying recurrences.
The urine dipstick is a useful diagnostic adjunct for determining the presence of pyuria. Leukocyte esterase and nitrate tests are complementary, increasing the overall sensitivity.
Always consider a sexually transmitted infection, especially with minimal pyuria and/or a new sexual partner.
The combination of symptoms of dysuria and frequency without vaginal discharge or irritation has an overall likelihood ratio of 24.6 in predicting acute urinary tract infection.
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Source: Field Guide to Bedside Diagnosis, 2007
Hematuria:
Diagnostic Approach
(Field Guide to Bedside Diagnosis)
A reasonable cutoff for discriminating benign from serious causes of hematuria is 10 RBCs/HPF. The urine dipstick detects as few as 1 to 2 RBCs/HPF. Analysis of the urine sediment is crucial. White cells and bacteria are indicative of cystitis whereas white cell casts are seen in pyelonephritis. Red cell casts and dipstick proteinuria indicate glomerulonephritis. Red cells from a glomerular source tend to be distorted. A positive dipstick for hemoglobin but no RBCs in the urinalysis suggests the presence of myoglobin or free hemoglobin derived from intravascular hemolysis. Menstrual blood contamination needs to be considered in the differential of microscopic hematuria.
Initial hematuria suggests a urethral source; terminal hematuria, the prostatic urethra, trigone, or base; and total hematuria, the kidney, ureter, or bladder. Massive hematuria is usually associated with bladder neoplasm, benign prostatic hypertrophy, or trauma. Bright red urine suggests a lower urinary source. Passage of bulky disc-like or fragmented clots implies the bladder as source, long shoestring clots suggest a ureteral origin, and pyramidal clots are from the renal pelvis. Glomerular sources virtually never produce clots (due to the presence of tissue plasminogen activators in the glomeruli and tubules). With a presentation of painless total hematuria, a urinary tract cancer is found in 20%.
Flank pain associated with hematuria may result from the passage of stones or clots. Hypertension suggests renal disease. Rash, fever, arthralgia/arthritis, or hemoptysis suggests a connective tissue disease or vasculitis. Beets, blackberries, and rhubarb, as well as pyridium, rifampin, phenothiazines, and anthracyclines, can produce red urine without blood.
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Source: Field Guide to Bedside Diagnosis, 2007
Bladder distention:
Physical assessment
(Signs & Symptoms: A 2-in-1 Reference for Nurses)
Take the patient’s vital signs, and percuss and palpate the bladder. (Remember that if the bladder is empty, it can’t be palpated through the abdominal wall.) Inspect the urethral meatus, and measure its diameter. Describe the appearance and amount of any discharge. Finally, test for perineal sensation and anal sphincter tone; in male patients, digitally examine the prostate gland.
» READ BOOK EXCERPT ONLINE »
Source: Signs & Symptoms: A 2-in-1 Reference for Nurses, 2007
Dysuria:
Physical assessment
(Signs & Symptoms: A 2-in-1 Reference for Nurses)
Ask the patient to void before beginning your examination. Inspect the urethral meatus for discharge, irritation, and other abnormalities. Then percuss over the kidneys. Costovertebral angle tenderness indicates kidney inflammation. Percuss the bladder. Start at the symphysis pubis and percuss upward. You should hear tympany; a dull sound signals retained urine. Then palpate the kidneys. Normally, they aren’t palpable unless they’re enlarged. If the kidneys feel enlarged, the patient may have hydronephrosis, cysts, or tumors. You won’t be able to palpate the bladder unless it’s distended. (See Palpating the kidneys.) A pelvic or rectal examination may be necessary.
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Source: Signs & Symptoms: A 2-in-1 Reference for Nurses, 2007
Hematuria:
Physical assessment
(Signs & Symptoms: A 2-in-1 Reference for Nurses)
Begin the physical examination by palpating and percussing the abdomen and flanks. Next, percuss the costovertebral angle (CVA) to elicit tenderness. Check the urinary meatus for bleeding or other abnormalities. Using a chemical reagent strip, test a urine specimen for protein. A vaginal or digital rectal examination may be necessary.
» READ BOOK EXCERPT ONLINE »
Source: Signs & Symptoms: A 2-in-1 Reference for Nurses, 2007
Dysuria:
Diagnostic Approach
(The Diagnostic Approach to Symptoms and Signs in Pediatrics)
History and physical exam are usually diagnosticof trauma, vulvovaginitis, labial adhesions, chemical irritation,and diaper dermatitis. Otherwise, suspect UTI and perform UA andurine culture.
Urinalysis
Presenceof WBCs (>10/high-power field) in sediment ofcentrifuged specimen of urine suggests but is not diagnostic ofUTI. Neither is positive leukocyte esterase test (urine dipstick), whichindicates presence of WBCs in urine.Positive nitrite test using nitritestrip (Griess test) on urine dipstick is highly sensitive and specificfor detection of gram-negative bacteria (e.g., E. coli, Klebsiella,and Proteus species). Positive reaction usually indicates 105 CFUs/mL.False-positive reactions are uncommon if urine is fresh; however,if urine is not examined immediately, test result may be positivebecause of bacteria growing at room temperature. False-negativereactions may occur when there has been inadequate time for bacterialproliferation (random collection rather than first morning specimen)or when infection is due to Enterococcal species and some Staphylococcaland Pseudomonas species that do not convert nitrate to nitrite.Presence of ≥1 bacteria/oilimmersion field of unspun urine (unstained or Gram stain) from clean-catchmidstream specimen correlates with urine colony count of >105 CFUs/mL80–95% of the time. Urine Culture
Quantitative culture of properly collectedurine specimen establishes diagnosis of UTI, and susceptibilitytesting can be performed. Table15.1, based on data from many studies, is useful guidefor diagnosis of UTI.
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Source: The Diagnostic Approach to Symptoms and Signs in Pediatrics, 2006
Hematuria:
Diagnostic Approach
(The Diagnostic Approach to Symptoms and Signs in Pediatrics)
First stepin diagnosis is to determine whether there is blood in urine. Althoughblood may produce pink, red, or brownish color of the urine, othersubstances also may produce same type of urinary discoloration.Urine dipstick detects hemoglobin containedin red cells as well as free Hgb. It can detect as few as 1 or 2red cells per high-power field in uncentrifuged specimen. Microscopydetermines whether red cells are in urine and thus the presenceof hematuria.Urine sample that tests positive ondipstick but negative on microscopy indicates presence of hemoglobinor myoglobin. Serum is pink in color with hemoglobinuria and normalin color with myoglobinuria.Best way to distinguish myoglobin fromHgb is immunochemically. Red, orange, or brownish urine that isdipstick negative for blood indicates that certain foods (blackberries,beets), food dyes, urate crystals, or drugs (pyridium, desferoximine)are coloring urine. Urine containing porphyrin initially has normalcolor but changes to red on standing; dipstick is negative, andno red cells are seen on microscopy. Hematuria without Proteinuria
Microscopichematuria without proteinuria is most commonly due to urinary tractinfection, trauma, acute postinfectious glomerulonephritis, immunoglobulinA nephropathy, familial benign hematuria, or nonfamilial benignhematuria.Following history and physical exam,these tests should be performed initially: UA of child and familymembers (to diagnose familial benign hematuria), urine culture,serum creatinine, blood urea nitrogen, C3, calcium:creatinine ratio,and renal U/S. If results of these tests are normal, andproteinuria is consistently absent, most causes of hematuria havebeen excluded and further diagnostic studies (e.g., cystoscopy andrenal biopsy) are usually unnecessary.Children categorized as having nonfamilialbenign hematuria because they have normal evaluation and no recognizablerenal disease may prove to have transient hematuria, but as longas hematuria occurs, these children should be followed for possibleoccurrence of proteinuria. Those with familial benign hematuriaalso should be followed.In addition to above tests, diagnosticevaluation of gross hematuria should include CBC, platelet count,antistreptolysin O or streptozyme titer, and Hgb electrophoresis(in African-American children). Renal angiography may be necessaryif vascular malformation is suspected. If proteinuria occurs whenhematuria subsides, renal biopsy may be indicated. Hematuria with Proteinuria
Glomerulonephritisshould be suspected in every child with hematuria and proteinuria.Presence of red cell casts indicatesglomerular bleeding.Results of tests for urinary protein(urine dipstick, sulfosalicylic acid test) are usually positivewith gross hematuria. Although dipstick protein reading of 3+ to4+ may signify glomerular disease with gross hematuria,lower reading may have diagnostic significance. See Chap. 50, Proteinuria, forprotein concentrations corresponding to dipstick readings.To more reliably detect proteinuriaassociated with glomerular disease, urine should be tested whengross hematuria subsides.Renal biopsy is required for specificdiagnosis unless there is evidence of unequivocal acute postinfectiousglomerulonephritis or family history of Alport syndrome. Biopsymay be necessary with acute postinfectious glomerulonephritis ifserum C3 level does not become normal within 2 mos, if proteinuriapersists for >6 mos, or to distinguish it from idiopathicrapidly progressive glomerulonephritis if presentation is that ofacute renal failure.
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Source: The Diagnostic Approach to Symptoms and Signs in Pediatrics, 2006
Bladder distention:
History and physical examination
(Nursing: Interpreting Signs and Symptoms)
If distention isn't severe, begin by reviewing the patient's voiding patterns. Find out the time and amount of the patient's last voiding and the amount of fluid consumed since then. Ask if he has difficulty urinating. Does he use Valsalva's maneuver or Credé's method to initiate urination? Does he urinate with urgency or without warning? Is urination painful or irritating? Ask about the force and continuity of his urine stream and whether he feels that his bladder is empty after voiding.
Explore the patient's history of urinary tract obstruction or infections; venereal disease; neurologic, intestinal, or pelvic surgery; lower abdominal or urinary tract trauma; and systemic or neurologic disorders. Note his drug history, including his use of over-the-counter drugs and herbal medicines.
Take the patient's vital signs, and percuss and palpate the bladder. (Remember that if the bladder is empty, it can't be palpated through the abdominal wall.) Inspect the urethral meatus, and measure its diameter. Describe the appearance and amount of any discharge. Finally, test for perineal sensation and anal sphincter tone; in male patients, digitally examine the prostate gland.
» READ BOOK EXCERPT ONLINE »
Source: Nursing: Interpreting Signs and Symptoms, 2007
Dysuria:
History and physical examination
(Nursing: Interpreting Signs and Symptoms)
If the patient complains of dysuria, have him describe its severity and location. When did he first notice it? Did anything precipitate it? Does anything aggravate or alleviate it?
Next, ask about previous urinary or genital tract infections. Has the patient recently undergone an invasive procedure, such as cystoscopy or urethral dilatation, or had a urinary catheter placed? Also ask if he has a history of intestinal disease. Ask the female patient about menstrual disorders and the use of products that irritate the urinary tract, such as bubble bath salts, feminine deodorants, contraceptive gels, or perineal lotions. Also ask her about vaginal discharge or pruritus.
During the physical examination, inspect the urethral meatus for discharge, irritation, or other abnormalities. A pelvic or rectal examination may be necessary.
» READ BOOK EXCERPT ONLINE »
Source: Nursing: Interpreting Signs and Symptoms, 2007
Hematuria:
History and physical examination
(Nursing: Interpreting Signs and Symptoms)
After detecting hematuria, take a pertinent health history. If hematuria is macroscopic, ask the patient when he first noticed blood in his urine. Does it vary in severity between voidings? Is it worse at the beginning, middle, or end of urination? Has it occurred before? Is the patient passing clots? To rule out artifactitious hematuria, ask about bleeding hemorrhoids or the onset of menses, if appropriate. Ask if there's pain or burning with hematuria episodes.
Ask about recent abdominal or flank trauma. Has the patient been exercising strenuously? Note a history of renal, urinary, prostatic, or coagulation disorders. Then obtain a drug history, noting anticoagulants or aspirin.
Begin the physical examination by palpating and percussing the abdomen and flanks. Next, percuss the costovertebral angle (CVA) to elicit tenderness. Check the urinary meatus for bleeding or other abnormalities. Using a chemical reagent strip, test a urine specimen for protein. A vaginal or digital rectal examination may be necessary.
» READ BOOK EXCERPT ONLINE »
Source: Nursing: Interpreting Signs and Symptoms, 2007
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