Splenic flexure syndrome exercises. Left-sided colitis also includes proctosigmoiditis, which affects rectum and the lower segment of colon located right above the rectum known. Splenic flexure syndrome exercises

 
 Left-sided colitis also includes proctosigmoiditis, which affects rectum and the lower segment of colon located right above the rectum knownSplenic flexure syndrome exercises  Here we present a case report of this unusual condition in a 7-year-old girl

This is a **very** physically painful problem in upper LEFT ab just slightly below the lowest LEFT SIDE rib. Splenic flexure is the area between SMA and IMA supplies, and the rectosigmoid junction is the region between the IMA and the superior rectal artery supplies. Splenic flexure volvulus in a child with chronic idiopathic intestinal pseudo-obstruction syndrome is extremely rare. It is an inflammatory bowel disorder that involves the large intestine and initially develops in rectal area but later affects the whole of the large intestine. Adjunctive therapy for neurogenic bladder and bowel disturbances, including splenic flexure syndrome and neurogenic colon;. Use with caution during exercise or hot weather; overheating may cause heat stroke. It turns downwards as the descending colon, which, like the ascending colon, is retroperitoneal. , in pancreatic cancer or due to antiphospholipid syndrome) Hematologic disorders (e. Asplenia refers to absence of the spleen thereby leading to deficient splenic function. 4. constipation. 29 Other allergic and dietetic gastroenteritis and colitis. and a failure to pass flatus or bowel movements. It is held on to the diaphragm by a peritoneal fold, the phrenicocolic ligament on which the spleen sits. Partial splenectomy is less common than removal of the whole spleen. Quantitative measurements fail to support this claim. weight loss. The passing of the splenic flexure is usually tackled with the patient in supine position (fig. [1] Since then the technique was subsequently refined by renowned surgeons including Kohler and Mikulicz. Left colic flexure (or splenic flexure) is the bend in the large intestine in the left upper quadrant of the abdomen as the transverse colon continues as the descending colon. Splenic flexure syndrome. This is the American ICD-10-CM version of D12. cases of splenic flexure syndrome were various types Fig. Obstruction of the splenic artery or its branches → splenic infarction; Associated risk factors include: Hypercoagulable states (e. , sickle. Your splenic flexure is situated adjacent to your spleen. The splenic flexure is situated next to the spleen and a section of the large intestine or colon. The splenic flexure is the last and highest positioned flexure in the colon. • Ninety-nine percent of cases are chronic hyperventilation syndrome (modest increase in respiratory rate or tidal volume). v. Applicable To. Bonuses are appreciated. Splenic-flexure syndrome is a chronic disorder that may be caused by gas trapped at bends (flexures) in the colon. 4. Intestinal obstruction is one of the most frequent reasons for obtaining surgical consultation in newborns. Human colonic motility: a comparative study of normal subjects, patients with ulcerative colitis, and patients with the irritable colon syndrome. Main symptoms are LUQ and left shoulder pain and fever. 4%) underwent extended right hemicolectomy, 24 (23. 7%) or extended procedures (extended right and left colectomies; n = 513, 39. Your splenic flexure is situated adjacent to your spleen. Splenic flexure mobilization was associated with wider margins (3. Splenic flexure syndrome is a type of IBS that causes gas to be trapped and then forcibly sent into the colon. I is it possible to cause splenic flexure syndrome after a colonoscopy?In medicine, splenic-flexure syndrome is a chronic disorder that seems to be caused by trapped gas at bends (flexures) in the colon. abdominal pain and tenderness. She had a long history of. Hi,I'm 50 and have splenic flexure,it is an awful problem and I have spent many hours in agony or unable to leave the toilet,I had a very good doctor,but alas he has retired,he said there was an operation but advised me not to have it as more go wrong than right and you really don't want anyone cocking up your colon ,I used to have a bout of SF. She presented with recurrent abdominal pain 45 days after bowel resection surgery. Splenic flexure syndrome is a condition basically characterized by pain and discomfort of the upper abdomen. But I'm a bit concerned this has been the cause of my digestive issue and low grade temp the last 3 years. 1136/pgmj. Overview of Splenic Flexure Syndrome Pain in the left upper abdomen may in some cases result from distension or spasm of the splenic flexure of the colon. A:The hepatic flexure, also known as the right colic flexure, is found in the digestive system of the human body. 2011. As a library, NLM provides access to scientific literature. People involved in strenuous sports are more prone to experiencing cramping pain under the left rib. Gas in the upper left portion of the colon can result in a condition called the splenic flexure syndrome. Some of the symptoms associated with splenic flexure syndrome can include: Colon spasms, which are involuntary and are often extremely painful contractions of your lower digestive tract. The group of Tracey also described a vago-splenic pathway, i. Lift up through the balls of your feet. is usually diagnosed in its early stages. 1,2 This syndrome At first, mistake in diagnosis of splenic flexure may be occurring but the experience can begin to grow in intensity. Splenic abscess is a collection of pus in the spleen due to spread of infection (via blood) from anywhere in the body (endocarditis, pneumonia, urinary tract infection and so on) or direct spread from adjacent organs. excessive gas or flatulence. In recent years, however, several studies have questioned which type of resection would provide the best surgical and. I suffer this evil, horrendous physical pain now and. Splenic flexure syndrome occurs when gas or stool become trapped in the splenic flexure. HG is transient and generally resolves within 72 hours . A total of 1304 patients were submitted to resection of the splenic flexure (n = 791, 60. Splenic flexure syndrome diet and nutrition guidelines. As is the case for you, large hiatal hernias can involve other abdominal organs, such as the colon, that then migrate into the chest along with the stomach. This condition includes. Causes of Splenic Flexure Syndrome Splenic flexure syndrome is a very common cause of left upper abdominal pain. Applicable To. 9,10 Opponents of routine splenic flexure mobilization argue that splenic flexure mobilization is a complex procedure, not a complication free approach, and time consuming. It is held on to the diaphragm by a peritoneal fold, the phrenicocolic ligament on which the spleen sits. The following are some of the conditions that are closely related to splenic flexure syndrome: 1. It is. This has not been reported after colonoscopy, but injury to the spleen has been. It won’t be unwise to seek medical help if you need another opinion. Esto se debe principalmente a la mayor cantidad de gas en el ángulo esplénico. Postgrad Med J. If the gas build-up too much, you can get “splenic flexure syndrome”. Workup of this clinical case revealed anomalous colonic anatomy, which led to successful laparoscopic. Avoiding foods that can cause gas and foods. During this process, I get on the floor and massage the lower right side as there is a great deal of watery stool there slushing around. 17. SFV was first reported in 1953 by Glazer and Adlersberg et al. • The paresthesias may be unilateral in 16% of patients, left side more often than right. g. Splenic infarction may be the result of arterial or venous occlusion. Colon cutoff sign. A second collection is anterior to the splenic flexure of the colon. And/or irritable bowel medications. Hepatodiaphragmatic interposition of the intestine, or Chilaiditi syndrome, is uncommon and typically asymptomatic, but it can be associated with symptoms ranging from intermittent, mild abdominal pain to acute intestinal obstruction. When this happens, food and liquids are not able to pass through your intestines. Infections such as Amoebiasis and Tuberculosis may also lead to this syndrome. 7% vs 19. The aim of the study was to evaluate splenic glucose metabolism in macrophage activation syndrome (MAS), characterized by overwhelming systemic inflammation. Lift up through the balls of your feet. Gurgling in the large intestine may be associated with these processes. Lie on your belly (you can use a small pillow or rolled-up towel under your hips for support). This stretch will apply gentle pressure to your lower abdomen and help to relieve bloating and abdominal pain. In about half of those patients in whom the spontaneous right upper quadrant pain. THE SPLENIC FLEXURE SYNDROME Postgrad Med J. 4. Splenic Flexure Syndrome from E-Coli?? So I have been bad stomach issues these last 3 weeks, I actually went to Urgent care twice because of the pain I was in. Most hamartomas are a mixture. . The hepatic flexure or right colic separates the ascending from the transverse colon and the splenic flexure or left colic separates the transverse and the descending colon. When the gas gets trapped inside the flexures or curves in your colon, it leads to a condition termed Splenic flexure syndrome. 41. Processed cereals and bread. What to Expect. Walk the hands further up the back for stability. Without obstruction: splenic flexure syndrome is a collection of symptoms from gas trapped at the upper left abdominal area: can cause cramping and spasm. The aim of this study was to review our experience in laparoscopic treatment. Pain from presumed gas pockets in the splenic flexure may masquerade as anterior chest pain or left upper quadrant abdominal pain. Take two walks and drink 2 l a day waterThe imaging diagnosis of splenic flexure syndrome. To our knowledge this is the first reported case of a patient managed with minimally invasive. 3 - other international versions of ICD-10 D12. C18. Roentgen examination of the gastrointestinal tract following a barium meal revealed a gas-distended loop of bowel, the splenic flexure of the colon, occupying the left upper quadrant of the abdomen (Fig. [] Population-based studies estimate the prevalence of irritable bowel. Hepatic and or splenic flexure, this is curves in your bowel, hepatic located on the right side and splenic on the left side. 11:56. Cecal perforation, mesentery ischemia, peritonitis, and subdiaphragmatic appendicitis have also been reported as complications of this condition and require. If there’s time, you’ll be advised to have a series of immunisations before. A proper diet is the first step to decreasing the chance of having complications with a tortuous colon. can you tell me what is splenic flexure syndrome? 1 doctor answer • 2 doctors weighed in. A 14-year-old boy with no medical history had severe left upper abdominal pain and. Try using simethicone tablets like Phazyme-125 or Extra Stength or Gas-X. Comida y dietaoccurs more often than right-sided colorectal cancers. Splenectomy (having the spleen removed) An operation to remove the spleen, known as a splenectomy, may be needed if the spleen is damaged, diseased or enlarged. Excess gas in the hepatic flexure or splenic flexure of the colon, although in itself not unusual nor necessarily significant, may at times be the explanation for symptoms suggesting cardiac, stomach, gall bladder, kidney or pulmonary disease. Hoegler was the first to diagnose this type of injury preoperatively with X-rays, in 1920, as cited by Akbulut and Otan 1. 7 Malignant neoplasm of sigmoid colon. Causes of the reduced blood flow can include. The following anatomical sites found in the Table of Neoplasms. is seen more often in men and in people under 65. Hepatic flexure syndrome is a common medical issue and it causes a variety of symptoms. This form of UC can cause inflammation anywhere from your rectum all the way to the splenic flexure of your colon, which is the bend near your spleen. . Please note that the simple action of having the glycerine suppository in my anus causes a bowel movement. Fig. 32 ). Failure to promptly identify and treat a splenic flexure volvulus can result in colonic ischaemia,. Splenic flexure: This is the sharp bend between the transverse colon and the descending colon. El Splenic Flexure Syndrome es sintomático, lo que significa que los alérgenos desencadenarán los síntomas, lo que causa dolor e incomodidad al individuo. Irregularities of the bowel caused by splenic flexure syndrome (SFS) may manifest as diarrhea or as constipation. doi: 10. Ive seen a gastro doc who diagnosed me with splenic flexure syndrome. It lies more cranial than the right colic. bowel. The phrenicocolic ligament attaches the splenic flexure to the left hemidiaphragm. This Billing and Coding Article provides billing and coding guidance for Local Coverage Determination (LCD) L34912 Genetic Testing for Lynch Syndrome. 89 became effective on October 1, 2023. The splenic flexure is the last and highest positioned flexure in the colon. e. Splenic hamartomas can be associated with syndromes—namely, tuberous sclerosis and Wiskott-Aldrich-syndrome. 57%), at the lower pole of the spleen in 15 (10. Many people have gas build-ups from time to time. g. e. I've felt every single one of those symptoms over the years, yet I have no chronic condition. But I'm a bit concerned this has been the cause of my digestive issue and low grade temp the last 3 years. Coronary artery insufficiency had been suspected but could not be confirmed. Benign neoplasm of hepatic flexure. 88%), between the hilum and lower pole of the spleen in 12 (8. The Vago-Splenic Pathway. Instead, there is often a nerve or muscle problem. Emergent surgical repair was. • Neurologists frequently see patients with hyperventilation syndrome with dizziness and bilateral paresthesias. vaginam for two weeks. Journal List. Can't even pass gas when system shuts down. The factors associated with splenic injury include difficulty intubating, looping of the instrument, traction on the splenocolic ligament, adhesions between the colon and spleen, and presence of a large polyp or mass at the splenic flexure. 4 min read The splenic flexure is a part of your colon, or your large intestine, where it bends near your spleen, an organ that mainly filters your blood. Splenic infarction [1] Definition: ischemic injury to the spleen that results in tissue necrosis; Pathophysiology. A number of situations can cause the likelihood of having splenic flexure syndrome including food, poisoning, air and disease. Other symptoms of splenic flexure syndrome include bloating, gas, diarrhea, and constipation. Left colic flexure (or splenic flexure) is the bend in the large intestine in the left upper quadrant of the abdomen as the transverse colon continues as the descending colon. • The paresthesias may be unilateral in 16% of patients, left side more often than right. Splenic injury is an extremely rare, yet serious, complication related to colonoscopy. 32 ). pain in the upper left quadrant of the abdomen that may radiate upward to the left shoulder and inner aspect of the left arm and that sometimes mimics. Results: An exploratory laparotomy showed multiple hard, gray liver nodules as well as a hard mass in the small bowel. Here’s my symptoms— I’m glad you found this— Buscopan number one in my bookSplenic lesions are commonly discovered incidentally at imaging, without clinical signs or symptoms that may aid in diagnosis. Background There is ongoing debate regarding surgical treatment of splenic flexure cancer. Many blood vessels come together at the splenic flexure, so the area is important for blood flow. Splenomegaly – This is when the spleen becomes swollen and enlarged due to an infection or other reasons. 1). Similar symptoms caused by ordinary gas attacks are relieved by passing gas by mouth or by rectum. the LACK of disorder/illness. Here we report a case of a child with syndrome of the splenic flexure of the colon. In hepatic flexure syndrome, the gas or stool is trapped in the hepatic flexure (over the liver). has tumors that grow along the wall of the colon. Background Splenic injury as a result of colonoscopy is rare but may be underreported and cases may remain undetected. When the bacteria that break food release a large amount of gas in digestive tract, it can cause the disorder. Add message Thanks. Splenomegaly in children. A splenic artery aneurysm is by definition a splenic artery that. But if gas builds up in your stomach it will be unpleasant, painful and discomforting. If this is negative then treat for splenic flexure syndrome which is presumed to be from trapped gas, so diet [nutrient dense, plant food] would be the main approach, along with a medication such as simethicone. Patients frequently report increased amounts of bloating and gas. 5% to 10% of all colon cancers. 41. often presents with constipation, narrow stools, and other bowel habit changes. ICD-9-CM 569. For this stretch, kneel on the floor and rest your bottom on the heels of your feet. I got the results back for the fecal. Using the left thumb, walk from splenic flexure (in zone 4) until reaching the sigmoid flexure (above. Splenic-flexure syndrome. Created for people with ongoing healthcare needs but benefits everyone. Obstructed. Gas in the Colon – Splenic Flexure Syndrome. Step 1-I then use about 8 glycerine suppositories and these make more watery stool come out. Hemorrhagic gastritis is the most commonly reported exercise-associated lesion with GI bleeding. Without obstruction: splenic flexure syndrome is a collection of symptoms from gas trapped at the upper left abdominal area: can cause cramping and spasm. If the sigmoid has been correctly straightened, once the tip of the scope is next to the curve, the splenic flexure is passed aspirating air and deflecting the tip on. constipation. Abdominal causes are generally due to the pathology involving spleen, stomach (also presents as epigastric and back pain), pancreas (usually present with epigastric and back pain), splenic flexure of the left colon (may have low. . Material and methods: The study group included 82 patients with HFSA, the comparison group--76 patients with irritable colon syndrome (ICS), control group--19 patients without colon pathology. The splenic flexure is attached to the stomach, spleen, and diaphragm by gastrocolic, phrenocolic, and splenocolic ligaments, respectively. Hypersplenism; Asplenia or hyposplenia; FOCAL SPLENIC LESIONS. The passing of the splenic flexure is usually tackled with the patient in supine position (fig. There is no free air seen in but. Extended right hemicolectomy refers to extension of the distal resection margin to include the distal transverse colon up to the splenic flexure. What are the symptoms, causes, and exercises for splenic flexure syndrome? Introduction. From: xPharm: The Comprehensive Pharmacology Reference,. These procedures may be done to treat spleen enlargement, anemia, cancer, ruptured spleen, and more. Thought to be the primary cause of this condition, gas accumulation causes trapped air to push on the inner lining of your stomach and digestive tract. This pain is usually felt in the upper left abdomen, near the spleen. Left sided colitis refers to disease involving the colon distal to the splenic flexure. This may sometimes be visible and feel like a hard knot or ball and is not due to enlargement. Have been referred today for tests for everything under the sun, ovarian cancer, coeliacs, ultrasound, fecal test, blood tests. For a more advanced. for bloating and specifically for bloating caused by splenic flexure syndrome. Pseudo-obstruction can be acute or chronic. An ovoid soft-tissue mass which was considered to be the spleen could be seen lying. For the present analyses, SFC patients were selected if they met the following criteria: (1) age > 18 years; (2) colon cancer located at the splenic flexure (i. Splenic Flexure Syndrome: The presence of gas in the colon is common. The spleen is a highly vascular organ that participates in hematologic and immune homeostasis. Try using simet. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM. 3%) underwent extended left. I. g. 6 Malignant neoplasm of descending colon C18. Step 1-I then use about 8 glycerine suppositories and these make more watery stool come out. 148. Yoga positions that may induce gas release include: Ananda Balasana (Happy Baby) Anjaneyasana (Low Lunge) Ardha Apanasana (Knee to Chest) Balasana (Child’s Pose) Supta Matsyendrasana (Spinal Twist) Uttanasana (Forward Fold) feeling of fullness. The exact cause of splenic flexure syndrome is unknown. Splenic-flexure syndrome often accompanies IBS. Temporary relief may be obtained by passing gas (see also below, Irritable Bowel Syndrome). The relevent history was of admission for the investigation of an iron-deficiency anaemia 4 years previously. Legs are perpendicular to the floor. Prunes. Splenic Flexure Syndrome: Causes, Symptoms & Management Introduction Splenic Flexure Syndrome Splenic flexure syndrome is a medical condition characterized by discomfort, pain, and bloating in the upper left DrCure. 89 may differ. Surgery to remove the spleen. It is also known as small left colon syndrome or functional immaturity of the. Many blood vessels come together at the splenic flexure, so the area is important for blood flow. INTRODUCTION. splenic flexure syndrome, like irritable bowel but in this location,,,,trapped gas,. Interesting you'd mention this. It may sometimes be more appropriate to have just part of your spleen removed – a partial splenectomy. ICD-10 code C18. Complications. Right colectomy refers to the resection of a portion of the distal ileum, cecum, ascending colon, and proximal to mid-transverse colon. It's also the place where many blood. His medical history was unimportant except for exercise 3 days ago. e. It relaxes the colon so that the. Its location is what makes you feel as though you have a pain in that specific area. Move the hips toward the front of the room and the feet toward the back of the room to straighten the body. Usually it didn't feel like that to me, but once in a great while, it did. Acute colonic pseudo-obstruction (ACPO), known as Ogilvie syndrome, is a distinct form of colonic dilatation without evidence of underlying mechanical or anatomic cause. Splenic flexure syndrome describes gas, bloating, and muscle spasms in the colon and or discomfort in the upper abdominal area. Left upper quadrant pain can originate from the chest, diaphragm, abdomen, peritoneum or general medical conditions. 10–12. Splenic Flexure – WebMD. Minimally invasive SFM improves visualization and minimizes splenic traction. sharp abdominal spasms or cramping. Posture advice, including the knee–chest position and abdominal compression using colonic intraluminal pressure for the resolution of incomplete volvulus during pain attacks, was effective. If you see. 1) to favor the opening of the splenic angle. This is the American ICD-10-CM version of K59. SFM is. Irritable Bowel Syndrome; mucus colitis; Splenic flexure syndrome; edit. However, there are days when everything shuts down from stomach thru colon. Prolapse frequently occurs due to the length of the transverse colon. Fig. Dr. The descending colon lies on the posterior abdominal. Treatment consists of medication for irritable bowel and diet. The descending colon lies on the posterior abdominal. Thought to be the primary cause of this condition, gas accumulation causes trapped air to push on the inner lining of your stomach and digestive tract. It further states that other causes of rib pain that feel like cramps are costochondritis, splenic flexure syndrome, fibromyalgia, medication, and. We describe the case of SFV diagnosed and treated laparoscopically in the non-volvulus condition. v. Key points. It is held on to the diaphragm by a peritoneal fold, the phrenicocolic ligament on which the spleen sits. Gas can build up at this flexure and give abdominal pain giving rise to a condition known as splenic flexure syndrome . b. La hinchazón también se observa como el signo más frecuente del síndrome del ángulo. Splenic infarction refers to occlusion of the splenic vascular supply, leading to parenchymal ischemia and subsequent tissue necrosis. It causes episodic rectal pain, which is usually attributed to muscle spasms. In medicine, splenic-flexure syndrome is a chronic disorder that seems to be caused by trapped gas at bends (flexures) in the colon. causes bowel obstructions more often than right-sided colorectal cancer. A splenic flexure volvulus (SFV) is usually densely attached to its adjacent organs, making it the least common site to develop a colonic volvulus [ 2 ]. Quote. Legs are perpendicular to the floor. Gas or wind, (known as flatus, pronounced FLAY-tuss) is. Examination at that time had shown no other cause for the anaemia. Abscess and infarction - Risk factors and. It is the result of arterial or venous compromise and is associated with a heterogeneous group of diseases. I eventually got into a Gastro doc and he ordered blood tests and stool test. Surgeons need to be facile and familiar with several approaches (Fig. It started in the middle of two really stressful days and so common sense tells me it's my IBS in a new. fever. This presentation may relate to the enlargement of accessory spleen due to venous congestion and the location approaching to splenic flexure and descending colon. Malignant neoplasm of splenic flexure C18. [ Read More ] corrected. The patient presented 2 days later with increasing shortness of breath and a new opacity on the frontal radiograph. It is important to note, however, that a gradual transition point is frequently present, usually at or near the splenic flexure 3. Symptoms include bloating, muscle spasms of the colon, and upper abdominal discomfort. Can be painful. Aim: To investigate phenotypical and clinical characteristics in individuals with high fixation of the splenic angle (HFSA). MAIN OUTCOME MEASURES: We evaluated Clavien-Dindo ≥3 postoperative complications and oncological (number of lymph nodes removed, length of free proximal and distal margins. Additionally, the use of electrocautery near the splenic flexure is also known to cause transmural burns. Splenic steal syndrome is a controversial diagnosis of hepatic artery hypoperfusion and may represent an underrecognized cause of graft ischemia in the United States. Many people have gas build-ups from time to time. Hemorrhagic gastritis is the most commonly reported exercise-associated lesion with GI bleeding. Learn how we can help. dtSplenic flexure syndrome, also known as left colonic flexure syndrome, is a condition characterized by pain and discomfort in the left upper quadrant of the abdomen. The woman denied that there had been any undue loss with her periods from that time until the present episode, and also denied having any abdominal pain. StenosisSigns and symptoms that may indicate the need for a colon removal, and should be looked at by a medical professional, include: pain in your abdomen. It has been considered a type of IBS. Open SFM is challenging due to anatomic position. ascending (eight), hepatic flexure (six), transverse (three) and splenic flexure (one). In the event of constipation or gas trapped at this site, a firm mass may be palpable in the upper left abdominal area. 1965 Mar;41(473):148-50. Colonoscopy is a diagnostic as well as a therapeutic procedure performed to evaluate the large intestine (i. Diagnosing. I was referred to a gastro surgeon who had me get barium enama (X-ray of my colon). • Ninety-nine percent of cases are chronic hyperventilation syndrome (modest increase in respiratory rate or tidal volume). This is very possibly splenic flexure syndrome, which is similar to irritable bowel syndrome but also though to be due to trapped gas in the area of the spleen, which is the location you describe, deep in, under the left lower ribs. Symptoms of sigmoid volvulus include: failing to pass a bowel movement. splenic flexure syndrome: symptoms of pain, gas, bloating, a sense of fullness experienced in the left upper abdominal quadrant, sometimes beneath the ribs, in some. SFV was first reported in 1953 by Glazer and Adlersberg et al. comprised of five odourless gases: nitrogen, hydrogen, carbon. 17. Watershed areas account for about 70% of ischemic colitis. nausea. Not exactly: Splenic flexure syndrome is a term used to describe bloating, muscle spasms of the colon, and upper abdominal discomfort thought to be caused by trapped gas at the splenic (on the left side) flexure in the colon. Splenic-flexure syndrome may occur due to gas trapped at bends (flexures) in the colon.