The clinical picture, including the location and quality of pain, is associated with the site of the stone. The degree of obstruction along with ureteral spasms and possibility of infection all contribute to the level of pain experienced by the patient.

Ureteral stones give rise to an abrupt onset of colicky pain in the flank and lower abdomen, and radiation to the lower pelvic region on the same side. Other common features are nausea and emesis.

When a stone is positioned in the upper urinary tract, the pain radiates to the flank and lumbar region. Right sided cases resemble cholecystitis or cholelithiasis while left-sided events mimic acute pancreatitis.

In cases with a stone in the midureteral region, the pain radiates anteriorly and inferiorly. Right sided pain can be confused with appendicitis and left sided episodes manifest similarly to acute diverticulitis.

If a stone is located at the ureterovesical junction, the patients are likely to experience urinary frequency and dysuria.

With regards to the pain, there are three stages in acute renal colic:

Acute phase

The onset of pain occurs in the morning or at night, often waking the patient. The intensity of the pain may peak as rapid as 30 minutes in some patients while it may take hours for others. 

The severe flank pain is associated with radiation to the groin, nausea, vomiting, and hematuria.

Constant phase

Upon achieving the maximum intensity, the pain persists until medical therapy is initiated or spontaneous abatement occurs.

Relief phase

As the name of this stage suggests, the patient becomes comfortable. This may follow the acute phase at any time.

Physical exam

The main finding on the exam is the profound costovertebral angle (CVA) tenderness. Also, the location of the pain can reflect the migration of the stone.

Abdominal exam is not remarkable as there are no peritoneal signs.

• Pain

  The therapeutic approach of renal colic consists of intravenous fluid hydration, pain medications, and antiemetics. Pain control is pertinent since this disease is one of the most painful ailments experienced by humans. [symptoma.com]

  Abstract Aminophylline (3 mg/kg i.v.) was injected in six patients with colicky pain caused by a ureter stone. In all but one this theophylline derivative caused a prompt and subjectively clear decrease in pain lasting from 30 min to 2 h. [ncbi.nlm.nih.gov]

  View larger version (208K) Fig. 1. —60-year-old man with left-sided flank pain. Un-enhanced CT scan reveals stone in distal left ureter ( arrow ). View larger version (199K) Fig. 2. —43-year-old man with right-sided flank pain. [ajronline.org]

• Inflammation

  Salpingitis and ... https://www.healthline.com/health/womens-health/salpingitis Salpingitis | definition of salpingitis by Medical dictionary salpingitis [sal″pin-ji´tis] 1. inflammation of a fallopian tube. 2. inflammation of the eustachian tube. [najdi.si]

  This can cause inflammation and an infection and other symptoms if left untreated. In its original Greek Ureterolithiasis literally means "Urine Stone" due to the fact that it affects the urinary tract. [ureterolithiasis.com]

  Cystoscopy (Fig. 4) confirmed the orthotopic ureterocele bulging into the bladder lumen, without signs of inflammation. Endoscopic meatotomy and lithotripsy were planned. [eurorad.org]

  - duration: 31: 22. docherty 1, 2, 3, *. it is unilateral ureteral ligation. ureteritis refers to inflammation of the ureters and it can have a number of causes. pptx - free download as powerpoint presentation (. introducción y objetivos. una vez identificada [opodokysonec.cf]

  The stone could be visualized endoscopically anterogradely and retrogradely, but due to inflammation, bleeding and lack of vision, a safe laser lithotripsy could not be attempted in that session. [bmcurol.biomedcentral.com]

• Severe Pain

  Because of intermittent, severe pain in the left flank and vomiting, he returned and FULL TEXT [annals.org]

  A 73-year-old white man developed sudden, severe, left flank pain. He came to the emergency department and a urinalysis showed microhematuria. [acpjournals.org]

  Two days later she was still complaining of severe pain, and had increasing tenderness in the left flank and abdomen. [academic.oup.com]

• Camping

  Kidney Stone Treatment Camp (11th to 24th Feb. 2017) Free OPD & Kidney Stone Treatment starts with only Rs. 11,999 (Limited to 60 Patients only) What is Ureterolithiasis? Ureterolithiasis refers to the formation of kidney stones in the uterus. [urologyandkidneystone.com]

• Severe Abdominal Pain

  CASE REPORT A 25 year old previously healthy female, presented at emergency surgical department, CHA with complaining of severe abdominal pain associated with two episodes of vomiting and chills and rigors. [scitcentral.com]

  Case presentation A 32-year-old white man, who works as a construction worker, presented to the emergency department with severe and debilitating abdominal pain. [casesjournal.biomedcentral.com]

  Ureteric colic has been described as the worst pain ever experienced by a patient.[17],[18],[19],[20],[21] It is defined as episodic severe abdominal pain from sustained contraction of the ureteric smooth muscle as a kidney stone passes down the ureter [njcponline.com]

• Left Lower Quadrant Pain

  Abdominal pain is not an uncommon presentation - but in this case it revealed an unusual diagnosis. A 43-year-old male arrives in the ED with left lower quadrant pain that started 2 days ago. [emra.org]

  Helical CT evaluation of acute right lower quadrant pain:... [posterng.netkey.at]

  The exclusion criteria were as follows: (1) absence of back, flank, or lower abdominal (including right or left lower quadrant) pain; (2) insufficient examination (lack of definitive radiological or urinalysis evidence or signs of hydronephrosis); (3) [link.springer.com]

• Lower Abdominal Pain

  We retrospectively identified 491 patients in our emergency department computer database who complained of back, flank, or lower abdominal pain during 2007-2015. [ncbi.nlm.nih.gov]

• Right Lower Quadrant Tenderness

  An abdominal exam revealed right lower quadrant tenderness at McBurney’s point with no rebound or guarding and a negative Rovsing’s sign. [academic.oup.com]

• Myopathy

  […] resistance to phagocytosis, and host substrate utilization New information on changes in body weight Recent findings on fibrocoxib and diclofenac Expanded and reorganized coverage of critical care New material on inborn errors of metabolism and acquired myopathies [books.google.de]

• Suggestibility

  However, we reported the development of bilateral distal ureteral ceftriaxone-associated lithiasis in 7 adults, which suggests that the risk of ureterolithiasis impaction should be considered when treating patients with ceftriaxone, even in adults. [ncbi.nlm.nih.gov]

  A routine urinalysis also is suggested, with careful attention to signs of infection, not just the presence of blood. [journals.lww.com]

• Seizure

  It may also be associated with certain migraine headaches or with taking certain seizure medications, such as topiramate (Topamax). Struvite stones. Struvite stones form in response to an infection, such as a urinary tract infection. [mayoclinic.org]

• Flank Pain

  View larger version (208K) Fig. 1. —60-year-old man with left-sided flank pain. Un-enhanced CT scan reveals stone in distal left ureter ( arrow ). View larger version (199K) Fig. 2. —43-year-old man with right-sided flank pain. [ajronline.org]

  MATERIAL AND METHODS: 119 patients with acute flank pain suggestive of stone disease (ureterolithiasis) were examined by both MDCT and IVU. [ncbi.nlm.nih.gov]

  A total of 122 consecutive patients with acute flank pain suggestive of urolithiasis were randomized for UHCT ( n=59) or IVU ( n=63)... [read.qxmd.com]

Evaluation of the patient involves a thorough history including the dietary and medicine intake. A physical exam is pertinent to exclude other differentials that may warrant immediate surgery such as acute appendicitis. The workup further includes laboratory studies and imaging.

Laboratory tests

Urine samples should be obtained to identify any gross or microscopic hematuria, which is observed in almost 85% of patients with stones.

A complete blood count (CBC) is very useful especially in patients with fever or other signs of infection. Other serum measurements include parathyroid hormone (PTH), electrolytes, creatinine, calcium, uric acid, and phosphorous. The results of these tests provide information about the kidney function. The findings can also offer insight on any metabolic abnormalities that predispose these patients to kidney stones.

The European Association of Urology proposes guidelines for evaluation of acute renal colic which are 1) a urine dipstick which can reveal the presence of blood and nitrites (if the latter is positive, a urine culture is warranted) and 2) a plasma creatinine level [5].

Imaging

Computed tomography (CT) without contrast of the abdomen and pelvis is the preferred imaging since it is associated with a sensitivity of 95% to 100% and is more specific than an intravenous pyelogram [6]. 

Retrograde pyelography provides the most precise assessment and the definitive diagnosis of urinary tract stones.

Ultrasonography of the urinary tract is the chief imaging study in pregnancy [7]. 

Evaluation of follow-up patients can be done by both CT imaging and the kidneys-ureters-bladder (KUB) radiograph. 

• Nephrolithiasis

  CONCLUSION: An mA as low as 70 (35 mAs) is acceptable for evaluation of nephrolithiasis. However, the evaluation of ureterolithiasis is compromised with an mA of 70. [ncbi.nlm.nih.gov]

  Posts tagged ureterolithiasis Choosing Wisely: Ultrasound For Suspected Nephrolithiasis Renal Michael Macias December 5, 2016 renal colic, kidney stone, ureterolithiasis, nephrolithiasis, flank pain, renal ultrasound, hydronephrosis, hydro, twinkle artifact [thepocusatlas.com]

  Ultrasonography versus computed tomography for suspected nephrolithiasis. [curbsideup.com]

  However, TP and Alb levels in patients with recurrent nephrolithiasis were 10 times higher than those in patients with initial nephrolithiasis; IgG and THP levels were also higher in recurrent diagnosis patients. [jstage.jst.go.jp]

The therapeutic approach of renal colic consists of intravenous fluid hydration, pain medications, and antiemetics.

Pain control is pertinent since this disease is one of the most painful ailments experienced by humans [8]. Adequate pain management is typically achieved with narcotics and nonsteroidal anti-inflammatory drugs (NSAIDs) [9]. The route of administration depends on whether the patient is tolerating oral intake.

Once the diagnosis is confirmed, the clinician should assess for possible obstruction and infection. In a case with only obstruction, analgesics and therapies that encourage the migration and excretion of the stone may be initiated. In cases with infection, antibiotics are indicated. Consultation with urology will guide the management more accurately. 

If there is no obstruction or infection, pain medications and other medical therapies can be used to guide the small stones (less than 5 to 6mm) to pass. However, stones with larger diameters may require surgical intervention.

Another drug that may significantly improve the pain is desmopressin (DDAVP), which has a rapid onset. DDAVP is not associated with side effects. Another benefit of DDAVP is that it may control the pain without the need for other medications.

Surgical therapy

The size of the stone determines whether the stone requires surgery or not. For example, if the diameter of the stone is 4mm or below, it is more likely to just pass. Stones greater than 8 mm will typically be removed through a surgical procedure.

Other important factors determining the need for surgery are pain and the presence of infection and obstruction. In fact, patients with both infection and obstruction are at increased risk for urosepsis and even mortality. Therefore, these cases require urgent surgical intervention with ureteral stent placement or percutaneous nephrostomy.

Percutaneous nephrostomy is a safer and more rapid method in septic or unstable patients. This technique drains the affected kidney.

For stones under 2 cm that impact the upper or middle calyx, the calculi can be removed through the minimally invasive procedure known as extracorporeal shockwave lithotripsy (SWL). Nevertheless, this technique is not performed in pregnant women.

In percutaneous nephrostolithotomy, large calculi are fragmented and removed from the urinary tract. However, this is associated with morbidity and thus is reserved for large (greater than 2 cm) and complex stones especially in cases where SWL and ureteroscopy are unsuccessful.

Other

Note that the passed stone should be collected and submitted for analysis. This can provide insight into the prevention of future episodes. 

Most cases of urolithiasis result in good outcomes. Specifically, almost 80% to 85% of urinary tract stones will pass spontaneously. However, about nearly 20% of patients are hospitalized for severe and persistent pain, urinary tract infections, inability to pass the stone, or intolerance to fluid intake.

Life-threatening complications include the co-manifestation of urinary tract obstruction and upper UTI. Other sequelae are pyelonephritis, pyonephrosis, and even urosepsis. These conditions warrant prompt surgical drainage.

Urinary calculi are associated with high recurrence frequency. Furthermore, this rate is typically reported as 50% within five years and at least 70% within a decade. However, these numbers may be lower according to literature. 

Kidney stones are formed under the influence of several factors as described below.

Predisposing conditions

Individuals with a personal history of stones, metabolic diseases such as diabetes mellitus, and hereditary disorders such as primary hyperoxaluria, cystinuria, and polycystic kidney disease are at elevated risk to develop stones. 

Environmental factors

The major environmental factor is low fluid consumption which results in oliguria and subsequently, elevated urinary solutes. Additionally, diet may aid in the growth of kidney stones.

Metabolic abnormalities

Increased calcium concentration in the urine is considered to be the most prevalent metabolic abnormality in the formation of urinary tract calculi. Hypercalciuria is attributed to 1) increased intestinal calcium absorption, 2) increased bone resorption such as in hyperparathyroidism, and 3) leak of calcium in from the renal tubules. The first cause is associated with higher intake of calcium and hyperactive pathways involved in intestinal absorption.

Hypomagnesuria and hypocitraturia are two other abnormalities. Magnesium and citrate inhibit the development of stones. Hence, a reduction in their levels corresponds to a higher risk of developing stones.

Drugs
Certain drugs or their resultant metabolites can produce stones once they precipitate in the urine. The main examples are the protease inhibitors indinavir and atazanavir, members of the sulfa family, as well as silicate, guaifenesin, and triamterene [1] [2] [3].

In the United States and other industrialized nations, the incidence of urinary tract calculi is 0.2% yearly. Furthermore, kidney stones develop in 5% to 12% of Americans. Additionally, 10% to 15% will have bilateral involvement. 

The location of the stones varies in different parts of the world, which is likely due to diet differences. For example, upper urinary tract stones are more prevalent in developed countries whereas bladder stones are more common in developing regions. 

Asia demonstrates a 2% to 5% lifetime risk of developing urolithiasis while the probability in the West is 8% to 15%. Furthermore, this disease is rarely observed in Greenland and certain coastal parts of Japan. 

With regards to patient demographics, there is a preference for males, who are 3 to 4 times more at risk than females. As for race, this disease occurs more frequently in Asians and white people as opposed to blacks, Native Americans, and individuals native to certain parts of the Mediterranean. 

Classification of kidney stones

There are four types of kidney stones according to their composition: calcium, struvite, uric acid and cystine. The cumulative number of etiologies are many.

The most common are the calcium stones, which is responsible for 75% of all renal calculi. The second most prevalent type is struvite as it accounts for 15%. This is linked to chronic urinary tract infections (UTI) secondary to Proteus, Pseudomonas, and Klebsiella species.

Uric acid stones compose 5% of stones. This type develops with acidic urine (pH below 5.5), malignancy, or excessive consumption of foods with purine such as legume, fish, and organ meats. Furthermore, almost 25% of cases with uric acid renal calculi exhibit gout.

The remaining 2% of kidney stones is comprised of cystine, which forms secondary to a metabolic defect that inhibits the tubular reabsorption of cystine, ornithine, and other amino acids. The elevated urine levels of cystine lead to the crystal deposition.

Pathogenesis of urolithiasis

There are two mechanisms thought to contribute to the pathogenesis of urolithiasis:

When the urine becomes heavily concentrated with calcium, oxalate, and uric acid, these ions crystallize. As these stones become lodged in the ureter, the patient experiences symptoms.

The second mechanism is described by the stone deposits on Randall plaques, which are comprised of calcium phosphate. The basis of this mechanism emerges from corroborating studies [4].

Acute renal colic

Renal colic is caused by obstruction, the subsequent dilation and stretching of the ureter, and spasms. The obstruction site is marked by inflammation and edema which may account for the initial pain. The exacerbation of the pain can be attributed to the peristalsis, movement of the stone, or twisting of the calculi which causes further blockage.

Preventative measures  include modification of diet, supplements, and certain medications. With regards to food, some data indicates that low protein and low salt are better than low calcium for prevention of further episodes [10]. 

In ureterolithiasis, the renal calculi are lodged into one or both ureters. The stones initially develop in the kidneys, but can grow further once they are positioned in the ureter. The ensuing clinical picture, renal colic, is regarded as one of the most painful situations rivaling events such as childbirth and surgery. 

There are four chemical types of urinary tract stones according to their composition: calcium, struvite, uric acid and cystine. There are more than 20 underlying etiologies for kidney stones. Additionally, there are risk factors for stone formation. For example, a previous or family history of kidney stones, renal disease, anatomical anomalies of the urinary tract and metabolic disorders can contribute to the development of calculi. 

The symptoms consist of excruciating pain that typically originates in the flank and radiates to the groin. Furthermore, the location of pain corresponds to the site of the stone in the ureter. The acute renal colic attack is also associated with nausea, vomiting and possibly hematuria. 

The assessment includes components such as a detailed history, physical exam, blood and urinary tests, and imaging. It is important to identify whether there is a presence of obstruction and/or infection. One or both of these manifestations will guide the therapeutic approach. 

Achieving pain control is the initial goal in the management of these patients. Surgical intervention is reserved for patients with larger stones and critically ill patients. Additionally, antibiotics therapy is indicated in cases complicated by infection. Finally, consultation with urology is pertinent for treatment and prevention of future episodes.

Kidney stones can lodge in the ureters, which are the long muscular tubes that join the kidneys to the bladder. When the stones block the ureters, the result is renal colic, which is a condition so painful that it is compared to childbirth.

There are different types of kidney stones and many causes. Some of the causes are related to problems with the metabolism that produce large levels of calcium in the urine. Additionally, certain disorders like diabetes mellitus, polycystic kidney disease, and hyperparathyroidism can influence the formation of stones. 

Patients with a personal history of stones can have recurrent episodes. Also, there are medications such as certain diuretics and calcium based antacids that can develop kidney stones.

The symptoms include very severe pain in the flank (lower back), which moves towards the groin as the stone travels towards the bladder. Patients usually experience nausea, vomiting and blood in the urine. Also, they may have urgency and frequent urination. Some patients will develop an infection and exhibit signs such as a fever and chills. 

To reach the diagnosis, the clinician will obtain a full history, physical exam, blood and urine studies, and imaging. 

The main component in the treatment of these patients is pain control. Also,  the patient may be prescribed medication that helps the stone pass through the urine. In large stones greater than 8mm, surgery may be needed to remove the stone. Finally, the patient should follow up with a urologist to help prevent further episodes. 

1. Russinko PJ, Agarwal S, Choi MJ, Kelty PJ. Obstructive nephropathy secondary to sulfasalazine calculi. Urology. 2003; 62(4):748. 
2. Thomas A, Woodard C, Rovner ES, Wein AJ. Urologic complications of nonurologic medications. Urologic Clinics of North America. 2003; 30(1):123-31. 
3. Whelan C, Schwartz BF. Bilateral guaifenesin ureteral calculi. Urology. 2004; 63(1):175-6.
4. Evan AP, Coe FL, Lingeman JE, Shao Y, Sommer AJ, Bledsoe SB, et al. Mechanism of formation of human calcium oxalate renal stones on Randall's plaque. Anat Rec (Hoboken). 2007; 290(10):1315-23.
5. European Association of Urology. Guidelines on urolithiasis. National Guideline Clearinghouse. Available at http://www.guidelines.gov/content.aspx?id=12528. Accessed: April 15, 2011.
6. Jindal G, Ramchandani P. Acute flank pain secondary to urolithiasis: radiologic evaluation and alternate diagnoses. Radiologic Clinics of North America 2007; 45(3):395-410,
7. Pais VM Jr, Payton AL, LaGrange CA. Urolithiasis in pregnancy. Urologic Clinics of North America. 2007.;34(1):43-52.
8. Wen CC, Nakada SY. Treatment selection and outcomes: renal calculi. Urologic Clinics of North America.  2007; 34(3):409-19.
9. Labrecque M, Dostaler LP, Rousselle R, Nguyen T, Poirier S. Efficacy of nonsteroidal anti-inflammatory drugs in the treatment of acute renal colic. A meta-analysis. Archives of Internal Medicine . 1994; 154(12):1381-7.
10. Borghi L, Schianchi T, Meschi T, Guerra A, Allegri F, Maggiore U, et al. Comparison of two diets for the prevention of recurrent stones in idiopathic hypercalciuria. New England Journal of Medicine. 2002; 346(2):77-84.