This difference was not statistically significant for those assigned to benralizumab, but the direction of the effect was also toward a lower risk of adverse events (3% lower). You would be responsible for any normal co-pays your insurance requires (just as you would if you were not in a clinical trial). Operative intervention is indicated only for symptoms, and all polyps larger than 1 cm should be resected. These opinions are in contrast to the online survey results (rating all outcomes as critical), which highlight the importance of having a conversation between patient and provider. The presence of liver metastasis from melanoma or cancer of the breast or stomach should be viewed as a marker of disseminated disease, and liver resection in these contexts is generally not recommended. Issues of professionalism, ethics and marketing are important areas for future research. Clinical assessment, rather than laboratory test results, should be the most important factor in the decision to transfuse and evidence-based guidelines should be followed where available. The application of these principles in practice is continually reexamined in the light of scientific advances. Another type of arrhythmia called ventricular fibrillation occurs when the lower heart chambers (the ventricles) quiver, preventing the heart from effectively pumping blood. A 70-year-old male with no significant medical problems presents to the emergency room at midnight with right subcostal pain, nausea, and vomiting for the last 48 hours. Your doctor will want to check your progress 1 to 4 weeks after you leave the hospital. Trauma is responsible for approximately 50% of all deaths in pregnant women, most commonly due to motor vehicle collisions, although both falls and abuse are major causes as well. The review committee felt that the Wagner scale was an inadequate tool by which patients should be stratified, so we attempted to stratify patients using different clinical grading systems in order to create stronger recommendations (Table 14). Intrathoracic perforation present with chest pain, subcutaneous emphysema, dyspnea, and a pleural effusion (right-sided in proximal perforations, left in distal perforations). The risk of sulfonamide crystalluria is decreased by maintaining a urinary output of at least 1. For example, you may hope that if you walk or swim regularly, you can still eat a lot of fatty foods and stay safe. If you need help tailoring the information in this book to your unique needs, talk to your nurse or doctor. In colonic tumors, both villin and beta-catenin are often expressed; in appendiceal metastases villin is often expressed, but beta-catenin is unusual and in ovarian mucinous adenocarcinomas neither villin nor betacatenin are seen. Moreover, the distinct clones are frequently characterized by unique combinations of virulence genes or alleles of virulence genes. We believe that it is vitally important that all health professionals are well informed about each other and are trained to work collaboratively for the benefit of the patient. It is true that adolescents age over 12 years are included in these studies, but the actual numbers enrolled are dwarfed by adult participants. Neonatal meningitis the organisms that cause neonatal meningitis are similar to those that cause neonatal septicaemia and pneumonia - namely Streptococcus pneumoniae, group A and group B streptococci and Escherichia coli. Development of Ehrlichia canis, causative agent of canine ehrlichiosis, in the tick Rhipicephalus sanguineus and its differentiation from a symbiotic rickettsia. Scientific Review Administrator Center for Scientific Review National Institutes of Health Federal Meeting Participants Patrick P. Long historical use of many forms of traditional medicine and experiences passed from generation to generation have demonstrated the effectiveness of traditional remedies. As this procedure is most commonly performed in a patient population at high risk of carrying bloodborne disease, the risk to the trauma team is not insubstantial and must be considered. If your symptoms stop completely in less than 5 minutes, you should still call your doctor right away.
The patient is positioned at a 30- to 45-degree angle in a semidecubitus position by placing a bump under the affected side. Professor, Department of Microbiology and Molecular Genetics University of California, Irvine School of Medicine Darren E. Work is in progress to review the content of blood component labels and improve their clarity. Pyogenic liver abscesses usually require drainage and systemic antibiotic therapy. The diarrhea in most cases has been transient and has stopped despite continued administration of the drug. Individual laboratories will need access to the most efficient algorithms for such analyses, and access to tools that will allow them to create their own knowledge environments. However, trial participants in the intensive group, with known histories of severe hypoglycemia before the trial, were less likely to die than were those in the standard group with a prior severe event. Department of Pathology, the Johns Hopkins Medical Institutions Ehrlichiae are small, gram-negative, obligately intracellular bacteria that reside within a phagosome. This requires a combination of high-quality donor recruitment and selection, infection screening, serological testing and blood component production (followed by rational clinical use). Research has shown that two processes have contributed to the rise of these organisms. In most cases, the total number of hours a school offers trends closely to what is required by that state for licensure. Harms There was a lower frequency of adverse events in children, adolescents and adults treated with tiotropium 5 ug compared to placebo. Increasing Access to Out-ofHospital Maternity Care Services through State-Regulated and Nationally-Certified Direct-Entry Midwives. Phenobarbital and corticosteroids lower plasma levels of metronidazole whereas cimetidine raises them. There is evidence to suggest that the prevalence of Type 2 diabetes is increasing in children and adolescents, which is also likely to be due to an increasing prevalence of obesity in these groups. The genus Ehrlichia was established in 1945 in honor of the German microbiologist Paul Ehrlich, and the general scientific distinction of rickettsiae and ehrlichiae from viruses and protozoa followed soon thereafter, mainly as a result of the advent of antibiotics and electron microscopy. Finding them can give you a chance to learn from others and to share your own feelings. Gastrointestinal stromal tumors: a review of characteristic morphologic, immunohistochemical, and molecular genetic features. Although their use is associated with pancreatitis in some patients, the overall frequency of pancreatitis with their use is not greater than in patients with diabetes using other agents. Her research mainly focuses on the field of Molecular Immunology under the guidance of Prof. External fixation is then maintained until soft-tissue swelling resolves and the leg can tolerate an open procedure. After enrolment of 3,149 patients, the Data Monitoring Committee recommended that the study be stopped due to highly significant excesses of events in the active group for both co-primary outcomes as well as hospitalizations and Chapter 24 / Newer Agents 763 heart failure events with no evidence of benefit in other secondary end points (Connolly et al. Ciprofloxacin is the preferred treatment option in all cases, but because of its lower cost, nalidixic acid is used in some countries. An arbitrary cutoff of 50% is often used, but this is paired with a judgment of whether the majority of studies support a specific action and whether the observed heterogeneity is clinically meaningful. Therapies for type 2 diabetes: lowering HbA1c and associated cardiovascular risk factors. Haemodynamically stable haemato-oncology patients who are anaemic after intensive chemotherapy rarely need transfusion if the Hb is >80 g/L. The key elements of this education, monitoring, and decision making process are based on evidence-based practice and informed consent.
The conference, "Pandemic Influenza: Confronting a Reemergent Threat," was sponsored by the National Institutes of Health, the University of Michigan, the Centers for Disease Control and Prevention, the Food and Drug Administration, the U. The use of inappropriate antimicrobials, suboptimal doses, the wrong duration of treatment and excessive use of one particular class of drugs will also increase the prevalence of resistance. They may adversely affect fetal and neonatal blood pressure control and renal function. Most colonic injuries occur due to penetrating trauma and are diagnosed at the time of laparotomy. Antisecretory activity is still decreased by approximately 45% at 4 hours after oral administration. There was a higher incidence of ventricular pauses in the first week, but not at day 30, in the ticagrelor group than in the clopidogrel group. Careful examination of a peripheral blood smear may show neutrophils that contain cytoplasmic vacuoles filled with ehrlichiae. Types of Perinatal Depression Even before the arrival of the baby, some women experience Depression During Pregnancy. Getting tested in a medical setting also allows your doctor to interpret the results for you and evaluate your need for further testing. Women of reproductive potential on oral contraceptives should be advised to add a barrier method of contraception when on a rifamycin. It is believed that the disease is spread through contact with the body fluids of infected sick or dying animals. Remove as many water and food sources as you can because cockroaches need food and water to survive. Undergoing a test for peripheral blood eosinophils involves venepuncture which may be more painful than not having a blood test, as such there may be small undesirable effects of the test. All of these bacteria must * Usually, bacterial cells die when a population reaches a certain size. Prostatitis due to Chlamydia trachomatis or Ureaplasma urealyticum in adults 100 mg orally every 12 hours for 14 days. Management of gallstones discovered at laparotomy remains controversial because the literature is conflicting with regard to the incidence of biliary symptoms after surgery in patients in whom the gallbladder is not removed. Advice in diagnosis and management should be sought from transfusion medicine specialists and Blood Service laboratories. Certain injuries (articular injuries and pelvic injuries) often necessitate further advanced imaging with computed tomography. Ligament sprains range from mild stretch to complete tear and are commonly sports related. The changing epidemiology of invasive group A streptococcal infections and the emergence of streptococcal toxic shock-like syndrome. Although rare, plague is enzootic in the United States, and 10 to 15 human cases are reported each year; typically only one or two of these are pneumonic plague cases (17). But in that study the high dose of metoprolol given to patients with a systolic blood pressure <110 mmHg was inappropriate (Khan 2007). Protocol for the Nutritional Management of Obesity, Diabetes and Hypertension in the Caribbean. Prevention of neonatal gonococcal conjunctivitis and recurrence of rheumatic fever due to group A b-haemolytic streptococci in patients allergic to penicillins. As better and safer cytoprotective drugs are discovered, the natural history of peptic ulcer in individual patients treated will be altered. It is bovine in origin and severe allergic reactions, occasionally fatal, occur in up to 1 in 200 patients on first exposure. Following oral administration, it is rapidly absorbed and distributed throughout the cellular tissues and body fluids; if the meninges are inflamed, significant amounts enter the cerebrospinal fluid. The determination of therapy goals for this patient requires consideration of multiple factors for weighing of benefits and risks. Because the presynaptic alpha 2-receptor is blocked by this agent, the release of norepinephrine from adrenergic neurons increases, causing tachycardia that may require control with a beta-blocker. Also, with atrial fibrillation, beta-blockers are most useful to achieve a ventricular rate <80/min. Rapid Estimate of Adult Literacy in Medicine (Baker 1999; Davis 1993) Limited health literacy (at or below sixth-grade reading level) Marginal (seventh- to eighth-grade reading level) Adequate (at or above ninth-grade reading level) About 3 minutes of total administration time.
Comparative prices of Fenofibrate | ||
# | Retailer | Average price |
1 | Dollar General | 216 |
2 | Gap | 821 |
3 | Family Dollar | 937 |
4 | Wegman's Food Markets | 616 |
5 | Toys "R" Us | 723 |
6 | Big Lots | 331 |
7 | Ruddick Corp. | 487 |
8 | Save Mart | 391 |
In some states, midwives are legally obligated to consult with and/or refer women to obstetricians or family physicians with obstetrical privileges when certain conditions arise. In addition, aspirin is given to people who arrive at the hospital with a suspected heart attack or stroke. On the other hand, falsely increased values may occur due to carbamylation of the hemoglobin and acidosis. Gastrointestinal intolerance was the only side effect recorded during the study in colchicine-treated patients. Create a graphical representation(s) to show the trait frequency of the bacterial population at the different points in time. Because of increasing resistance of coagulase-negative staphylococci to cloxacillin, initial empirical therapy should include vancomycin plus gentamicin. The most common bacterial causes of pharyngitis are Streptococcus pyogenes (which may be associated with acute rheumatic fever) and Corynebacterium diphtheriae. They are useful in patients who are normotensive but have paroxysmal episodes of hypertension, because they are less likely to cause significant orthostatic hypotension or overshoot hypotension. In humans, histamine activation of parietal cells is of central importance in gastric acid production. Another problem is the delay in getting information on the death certificate into the database for review, which makes this system relatively slow. Unstable pelvic fractures in association with hypotension should undergo some form of external stabilization. Absorption proved very variable and caused up to 49 % apparent resistance to a single dose of enteric coated aspirin but not to immediate release aspirin (0 %); pharmacologic resistance to aspirin is rare; the study failed to identify a single case of true aspirin resistance. Around 40% of these transfusions were given to non-bleeding patients with normal or only mildly deranged clotting tests and many doses were subtherapeutic. Up to 80% of preterm babies weighing less than 1500 g at birth are transfused at least once. The mother may experience dizziness, postural hypotension, a lupus syndrome, palpitations, and edema. Displaced fractures are at risk of nonunion and avascular necrosis and benefit from surgical treatment. Defining the group A streptococcal toxic shock syndrome: rationale and consensus definition. The results were interpreted to mean that O157:H7 organisms recovered from epidemiologically unassociated North American outbreaks belong to a single geographically widespread pathogenic clone with specific virulence properties (33). A young woman with esophageal neuromotor dysfunction undergoes an uncomplicated laparoscopic Nissen fundoplication. An individual participant data metaanalysis of 23 studies in the Asia-Pacific region. The restriction of speA2 and speA3 to single clonal lineages can be interpreted as evidence that these two alleles are evolutionarily younger than speA1. It runs counter to the intent of Congress when it established the modern generics industry 35 years ago. The discovery of this "hidden mainstream" of American health care is no longer disputed. In addition to medical history, the mechanism of injury, especially the relative energy associated with the injury. Cytokeratin 7 and 20 expression in cholangiocarcinomas varies along the biliary tract but still differs from that in colorectal carcinoma metastases.
The more you understand about Perinatal Depression, the better you will be able to care for yourself and the ones you love. Hypoxemia, renal failure, hypocalcemia, hyperglycemia and respiratory failure are evidence of severe systemic effects. Lifelong morbidity associated with the presence of a Meckel diverticulum is extremely low. A complete list of genes from this model can be found in Table S1 (Supplementary Material). His past medical history is significant for hypertension and diabetes, and his past surgical history is significant for an open appendectomy for perforated appendicitis and open ventral hernia repair. Ocular disturbances, particularly blurred vision, are another antimuscarinic effect of pirenzepine experienced by approximately 1% of patients receiving 100 mgday. Presentation is typically in the sixth decade with epigastric pain, weight loss, anorexia, nausea, and vomiting. Successful implementation of the plan will require committed action by public health authorities and collaboration and cooperation by many institutions and experts throughout the region. Particular efforts have been expended in his laboratory since 1988 on the study of the agents and diseases of human ehrlichial infections. Monitor blood glucose; may require dose increase or change to an alternate hypoglycemic drug. Deaths will be handled as in the clinician-based system with regard to periodic review and laboratory testing, although it is expected that fewer clinical specimens will be available from patients whose deaths were not reported through the clinician-based system. Besides, a risk score from Taiwan shows that white blood cell count can also improve prediction, although the accuracy of the derived score is low [171]. Characteristically, dysphagia resulting from an esophageal stricture produces the sensation of solid food sticking in the chest or neck. Too much lactic acid is a serious but rare medical emergency that can lead to death. Simple lacerations can be repaired in one layer using a synthetic absorbable suture. Women with anomalous RhD typing results should be treated as RhD negative until confirmatory testing is completed. Clinicians who reported cases will be informed of laboratory results, but information will usually not be available in time to affect treatment of individual patients. These differences may have practical importance in certain clinical circumstances. These are typically associated with lacerations of the fingertip or nail-bed injuries. Regulation and Certification Laws regulating the practice of homeopathy vary from state to state. Metformin in patients with type 2 diabetes mellitus: reconsideration of traditional contraindications. Western blot analysis of sera from Lyme borreliosis patients according to the genomic species of the Borrelia strains used as antigens. Or, instead of rewarding yourself with food, choose a special outing, concert or book. Previously healthy persons might also be considered better sentinels for new infectious diseases because of their generally more vigorous interaction with people and higher likelihood of exposure to infections. The source is typically a peptic ulcer of adjacent normal ileum caused by acid secretion from gastric mucosa within the diverticulum. To make the process easier, try these tips: Place "sticky notes" in visible places to remind yourself to take your medicines. Some states such as Oregon, Illinois, Oklahoma, and New Mexico allow a broader scope of practice, while other states such as Washington and Michigan are more restrictive. Professor and Director Center for Microbial Sciences San Diego State University Carol A. In some cases repeated aspiration or surgical washout of the joint may also be necessary. The majority of people in your situation would want the recommended course of action, but many would not. The updated charts will be available on paper but also electronically and in mobile applications, with links to simplified management algorithms and decision support for health workers.
This lack of complete efficacy has been shared by all the Hz-receptor antagonists studied to date. In the primed infusion regimen, an intravenous bolus of 300 mg was followed by a continuous infusion of 37. Because no data are presently available to support the use of omeprazole maintenance therapy once ulcers have healed, maintenance therapy with a long-acting Hz-receptor antagonist could then be employed chronically. An overview of guideline-endorsed glycemic goals and considerations for less stringent goals can be found in Table 1-5. Endometrioid-type carcinomas can also be histologically indistinguishable from colorectal carcinoma. Counselors at cardiac rehab programs may be able to provide support and resources for those considering a job change. Secondary dysmotility represents the esophageal response to inflammatory injury or systemic disorders. Findings and Recommendations Regarding the Prescribing and Furnishing Authority of a Naturopathic Doctor. At present about two-thirds of persons with diabetes live in developing countries and the majority of new cases will originate from these areas. Sepsis accompanies a large percentage of fistulas and is caused by undrained enteric leaks or abscesses. The literature searches included systematic reviews of randomised clinical trials including (moderate to severe) asthma population receiving the interventions of interest. A genome-wide association study of type 2 diabetes in Finns detects multiple susceptibility variants. This has been made more feasible by newly developed nucleic acid-based methods for identification of unknown etiologic agents. Endocarditis due to meticillinsusceptible Staphylococcus aureus Adults: 1 mg/kg i. Diaphragmatic injuries occur most commonly as a result of penetrating thoracic or abdominal trauma. Risk factors for 1-year relapse of pulmonary tuberculosis treated with a 6-month daily regimen. Interaction may occur with drugs that are metabolized by or that inhibit cytochrome P-450 3A4: amlodipine, amiodarone, diltiazem, disopyramide, felodipine, losartan, mibefradil, nifedipine, ranolazine or similar agents, quinidine, verapamil, clarithromycin or similar antibiotics, antifungals, and statins. Percutaneous treatment after antihelminthic treatment is increasingly utilized for treatment with acceptable results. Statins can rarely cause hepatitis and jaundice, hepatic failure, and pancreatitis. The incidence of concomitant vascular injury is approximately 30%, and pedal pulse examination has a low sensitivity (79%) for detecting significant vascular injury. The stepwise approach to therapy emphasizes that once control of asthma is achieved, the dose of medication should be carefully titrated to the minimum dose required to maintain control, thus reducing the potential for adverse effect. Effectiveness of antibiotic prophylaxis to prevent prosthetic valve endocarditis: evidence in humans. The pathogens most commonly involved are Neisseria gonorrhoeae and Chlamydia trachomatis. Calcaneal fractures are associated with swelling, heel widening, tenderness, and ecchymosis. They then return to work part time or full time, depending on their financial needs and their speed of recovery. Drainage can be performed percutaneously in most cases, but occasionally an operative procedure is recommended when there are multiple, large, loculated abscesses and in patients who otherwise require laparotomy for the underlying cause of the abscess. Repeat hepatic resection for recurrence has been demonstrated to be safe and effective in selected patients.
Characterization of epidemic and non-epidemic Neisseria meningitidis serogroup A strains from Sudan and Sweden. A randomised controlled trial in north America recently showed no significant difference in bleeding rates when patients on prophylaxis were randomised to low, medium or high platelet doses. She is nontoxic at presentation with tenderness to her epigastrium and has laboratory data showing no leukocytosis, a bilirubin of 1. When exercise is planned and controlled, it can strengthen the heart muscle just as exercise does for other muscles. For patients who are unable to identify themselves (paediatric, unconscious, confused or language barrier) seek verification of identity from a parent or carer at the bedside. They should be supplied with clear written information and informed consent should be obtained. It is recommended that: Red cells are transfused at up to 5 mL/kg/h (unless there is active major bleeding) and the transfusions should be completed within 4 hours (see Chapter 4). Handbook of Transfusion Medicine Higher doses were no more effective and it is not a substitute for coagulation factor replacement. While all of these medications can help people quit smoking, they are not safe for everyone. A type of herpes virus which is transmissible via transfusion and can cause infection in immunosuppressed patients. The effects of nifedipine and isradipine are reduced by carbamazepine, phenobarbitone, primidone, and phenytoin. In the absence of associated pulmonary vascular or great-vessel injury, vigorous volume resuscitation is undertaken. Barriers to insulin initiation: the translating research into action for diabetes insulin starts project. When you share your feelings openly with friends and family, it allows them to provide the important support that you need. The 45-hour pilot course for all primary care providers in Integrative Health started in January 2016 and was made available to the larger community after June 2016. The diagnosis should be considered if a patient has persistent bloody diarrhoea (dysentery) despite therapy for shigellosis. Obstetric and anaesthetic staff of appropriate seniority must be involved and access to expert haematological advice is important. Wherever possible, patients for blood sampling or transfusion should be asked to state their full name and date of birth and this must exactly match the information on the identification band. There is no evidence that periostin is a suitable biomarker to guide asthma treatment in children or adolescents. Understanding this process will demand expertise in microbial genetics, physiology, ecology, and mathematics. Although population genetics has only been applied to the study of pathogenic bacteria for approximately a decade, considerable insight has been gained into the molecular mechanisms of temporal variation in disease frequency and severity, host adaptation of clonal lineages, and the relationship of disease severity and naturally occurring bacterial clones. By the end of October, the Centers for Disease Control and Prevention had ruled out dengue, other arboviruses, and hemorrhagic fever viruses as causes but had identified leptospira by immunohistochemistry in tissues from four patients with fatal cases. Irritation of adjacent structures can cause diarrhea, urinary frequency, pyuria, or microscopic hematuria. Examination of cervical smears is not reliable and cultures should be prepared whenever possible. Periumbilical: Midgutderived structures (second portion of duodenum to proximal two-thirds of transverse colon). Therefore, the initial approach to managing acute pancreatitis focuses on supporting patients with aggressive fluid resuscitation and close monitoring. The course will be taught in Atlanta, Georgia from April 27 to May 1 and will discuss the epidemiology, clinical features, pathology, and pathogenesis of such diseases as plague, Lyme disease, Kaposi sarcoma, microsporidiosis, Buruli ulcer, ehrlichiosis, hantavirus pulmonary syndrome, and Ebola virus infection. The anterior leaflet of the mitral valve is displaced toward the hypertrophied septum.
Comparative ultrastructural study on the cell envelopes of Rickettsia prowazekii, Rickettsia rickettsii, and Rickettsia tsutsugamushi. This may also be helped by the use of standardised indication codes for transfusion, such as those developed by the English national Blood Transfusion Committee. Smoking Smoking is the "leading cause of preventable death and disease in the United States," according to the Centers for Disease Control and Prevention. The picture painted by the Access and Savings Report, however, is far from perfect. For those with erosive esophagitis - a subpopulation of refluxers with more severe reflux disease - H2 blockers heal the erosions in about 50% of patients. With a persistent obstruction, hypovolemia progresses due to impaired intestinal absorption, increased secretion, and fluid losses from emesis. Anti-D Ig should be administered within 72 hours of delivery of a RhD positive baby or a potentially sensitising event in pregnancy in accordance with national guidelines. Women who have had diabetes during pregnancy (gestational diabetes), or who gave birth to a baby weighing more than 9 pounds, are also more likely to develop type 2 diabetes in later life. Serotype M1 has the lower line connecting solid circles indicates the number of blood cultures predominated in reports of positive for S. It was a major cause of perinatal mortality before routine postnatal anti-D Ig prophylaxis was introduced. Single plant or herbal formula used and broadly accepted as efficacious based on a long history of use that has been tested for quality control and safety. Malunions affect the patient to varying degrees depending on location and severity. Emergency or critically ill patients with temporary incapacity must be given lifesaving transfusion unless there is clear evidence of prior refusal such as a valid Advance Decision Document. Presentation in uncomplicated disease is characterized by burning, gnawing, intermittent epigastric pain relieved by food or antacid ingestion for duodenal ulcers but exacerbated for gastric ulcers. In contrast, a preliminary, population-based report from Israel (14) found no such increase. They may wish to deal with their problem secretly and hope that it goes away on its own. Blood collected from a donor before separation into red cells, platelets and plasma. Like the long-acting analogs, the rapid-acting analogs were first studied in pregnancy in type 1 diabetes. Dr Sharma has maintained a strong clinical practice with a focus on patients with type 1 and type 2 diabetes and kidney disease. Other members of the organization are continuing to promote an increase in research into Ayurveda treatments and systems methodology. Recommend a 3-month trial of: Stop smoking, eating 3 meals per day, drinking peppermint tea at the end of meals, resting in bed after meals. Usefully, the high platelet content may reduce the need for platelet transfusions. Ultrasound guidance has been shown to increase first attempt success rate and decrease complication rate in internal jugular central venous cannulation in both prospective randomized trials and meta-analyses. The surgeon removes lymph nodes in the central neck compartment in most people with medullary thyroid cancer when the diagnosis is made preoperatively. Her primary research interests are evidence-based medicine, systematic review methodology and chronic diseases research. In addition, most users put homeopathy among the top three complementary and integrative strategies they use in their health care. However, bismuth causes blackening of the stools which may be confused with melena. A Meckel scan is a radionucleotide study based on the uptake of Tc99m pertechnetate by ectopic gastric mucosa.