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Flat-panel x-ray detector using amorphous silicon technology. Reduced radiation dose for the detection of foreign bodies.

RATIONALE AND OBJECTIVES: The authors evaluate a new flat-panel x-ray detector (FD) with respect to foreign body detection and reduction of radiation dose compared with screen-film radiography. METHODS: Flat-panel x-ray detector is based on amorphous silicon technology and uses a 1 k x 1 k photo-detector matrix with a pixel size of 143 x 143 microns and 12-bit digital output. A thallium-dotted cesium iodide scintillation layer converts x-rays into light. An ex vivo experimental model was used to determine the detectability of foreign bodies. Foreign bodies with varying sizes were examined: glass with and without addition of lead, bone, aluminium, iron, copper, gravel fragments, and graphite. Four hundred observation fields were examined using conventional radiography (speed, 400; system dose: 2.5 microGy) as well as FD with a simulated speed of 400, 800, 1200, and 1600, corresponding to a detector dose of 2.5 microGy, 1.25 microGy, 0.87 microGy, and 0.625 microGy, respectively. Four independent radiologists performed receiver operating characteristic analysis of 8000 observations. RESULTS: Flat-panel x-ray detector with a simulated speed of 400 was significantly superior (P = 0.012) to screen-film radiography (speed, 400). At a simulated speed of 800 and 1200 FD yielded results equivalent to screen-film radiography. Flat-panel x-ray detector was significantly inferior to screen-film radiography at a simulated speed of 1600 (P = 0.012). CONCLUSIONS: Flat-panel x-ray detector technology allows significant reduction in radiation dose compared with screen-film radiography without loss of diagnostic accuracy.

Foreign Bodies↗

Otorhinolaryngeal foreign bodies in children presenting to the emergency department.

INTRODUCTION: Accidents with foreign bodies are common in the paediatric population. It is impossible to mandate that all foreign bodies (FB) in the ear, nose and throat (ENT) of children should be removed by the specialty-trained physicians. This study evaluates the management of ENT FB removal in children achieved by emergency physicians not trained in otolaryngology in an urban tertiary care paediatric emergency department. METHODS: A retrospective study was conducted on consecutive paediatric patients presenting with suspected foreign body in the ear, nose or throat to the children's emergency department (ED) of KK Women's and Children's Hospital over a 10-month period. Removal methods, foreign body types, rates of successful removal and associated complications were evaluated. RESULTS: There were 353 patients, most of whom presented after office hours. An attempt at removal of FB by the emergency physician was made in 76.8 percent of the cases. ENT specialist referral in the ED was made in 1.7 percent of the cases. 50.1 percent of cases were discharged after successful removal of FB in the ED. 4.2 percent of cases were admitted for removal of FB and 44.8 percent of cases were referred to the ENT specialist clinic for further assessment. CONCLUSION: The emergency physician managed most cases in the ED and urgent referral to ENT specialists was not required. Complications and morbidity often occur from repeated attempts at removal of the FB. ENT opinion should be sought whenever there is doubt. The ED physician should be skilled in techniques of FB removal, especially throat FB, which had the lowest rate of success in our study.

Age Distribution↗

Bronchoscopy for foreign body removal in children. A review and analysis of 210 cases.

OBJECTIVE: A foreign body aspiration in the tracheobronchial tree is a dangerous and common medical emergency in childhood, with serious and potentially lethal consequences. It must be suspected in children with a suggestive history, even though the clinical symptoms or radiographic findings are not pathognomonic for foreign body aspiration. METHODS: In this study 210 pediatric cases, with a suggestive history of foreign body aspiration undergoing bronchoscopy in the last 8 years in the department, were reviewed. In all cases bronchoscopy was performed under general anesthesia using a Storz ventilation bronchoscope with distal cold light illumination. RESULTS: In 130 patients a foreign body was discovered, in 17 cases pus was aspirated and in 63 cases there were no findings. Seventy-eight (60%) foreign bodies were found in the right main bronchus, 43 (33.1%) in left main bronchus, seven (5.4%) in both bronchi and two (1.5%) were found in the subglottic area. The incidence of bronchoscopy during the last 8 years was 28 procedures per 100000 children population per year in the island of Crete. CONCLUSION: More attention should be given to the need for a careful history and the use of radiographs as supplemental information to make the decision to perform a bronchoscopy. The parents, also, should pay attention not to allow children dry fruits and small toys, as well as, teaching their children to avoid any physical or emotional activity while having a full mouth.

Adolescent↗

Insurance status as a risk factor for foreign body ingestion or aspiration.

OBJECTIVE: To determine whether the lack of private health insurance places children at increased risk for foreign body ingestion or aspiration. DESIGN: Retrospective review. SETTING: St. Louis Children's Hospital, a tertiary care center. PATIENTS: Consecutive sample of 125 patients with esophageal or airway foreign bodies. RESULTS: Fifty percent of all patients had private health insurance. Fifty-six percent of all preschool patients and 20% of all school-age patients were uninsured (P < 0.01, Fisher's exact test). Eighty-five percent of patients with airway foreign bodies, and 84% of patients with esophageal foreign bodies were in the preschool group. Sixty-one percent of preschool patients and 21% of school-age patients with esophageal foreign bodies were uninsured (P < 0.05). Forty-six percent of preschool patients with food aspiration lacked health insurance (88% of these children were fed the aspirated item). No school-age group was available for comparison. Fifty percent of preschool children with aspiration of non food items were uninsured, as were 16% of their school-age counterparts. CONCLUSIONS: Insurance status must be considered as a risk factor for foreign body aspiration and ingestion. Preschool children are more likely to lack private health insurance than school-age children with the same diagnosis. In a majority of aspiration events, the child was being fed the inappropriate food item, perhaps indicating a lack of caretaker education and anticipatory guidance. A direct focus on 'passive protection', anticipatory guidance in clinics for all patients, and public education with emphasis on preventive care are proposed as means to decrease the incidence of airway and esophageal foreign bodies in children.

Age Factors↗

Bronchial foreign body presenting as an accidental radiological finding.

The aspiration of a foreign body in an airway is usually associated with respiratory distress, wheeze and persistent cough. The highest incidence of foreign body inhalation occurs between the age of 1 and 3 years [Ann. Otol. Rhinol. Laryngol. 89 (1980) 434: Med. J. Aust. 2 (1983) 322]. Asymptomatic and long standing foreign bodies may lead to complications such as recurrent pneumonia, bronchiectasis, atelectasis and even death. We present here a case of a metallic bronchial foreign body, which was discovered only as an accidental radiological finding on a chest X-ray, which was done for a mild lower respiratory tract infection, presumably 4 months after such an aspiration.

Bronchi↗

Retrieval of intravascular foreign bodies.

The use of intravascular catheters for diagnostic and therapeutic purposes has resulted in an increased number of foreign body embolizations. The retained foreign body is a potential source of morbidity and mortality. In this communication we describe the different techniques that are used to remove foreign bodies from various locations within the heart or vascular tree. A brief review of the literature concerning the reported complications from retained foreign bodies is made to underline the importance of early percutaneous removal of these fragments.

Blood Vessels↗

Detection of glass foreign bodies by radiography.

During a 14-month period patients with suspected glass foreign bodies were radiographically examined before removal of the glass. In 25 out of 26 patients the glass foreign bodies were detected. In 9 patients the glass foreign bodies had been overlooked on previous visits to doctors or hospitals, where the examination had been limited to inspection and sometimes probing of the wound. Almost all glass foreign bodies can be detected radiographically. With high-resolution or mammographic techniques even minute splinters may show up.

Adult↗

Endoscopic retrieval of an unusual gastric foreign body.

A case of endoscopic retrieval of a gastric foreign body, retained due to peptic ulcer disease, is reported. An Olympus polypectomy snare was used to extract the foreign body. The role of endoscopy in the management of an upper gastrointestinal tract foreign body is discussed.

Fiber Optic Technology↗

[Foreign body aspiration in children: ten-years experience at the Ha'Emek Medical Center].

INTRODUCTION: Foreign body aspiration is common in young children. Delay in treatment may lead to complications and an emergency bronchoscopy must be performed in suspicious cases. Prevention is the most critical element needed to reduce this morbidity. PURPOSE: To examine the demographic data of children at high risk of foreign body aspiration in order to develop precautionary measures oriented to this population. METHODS: A retrospective review was prepared of all the charts of children under 16 years old who underwent bronchoscopy for suspected foreign body aspiration in Ha'Emek Medical Center during the period 1994-2004. RESULTS: The review presented a total of 136 children who had undergone bronchoscopy. Foreign bodies were found in 73% of the cases. Two thirds of the patients were male and two thirds were children less then two years old. The incidence of bronchoscopies that were positive for foreign bodies was higher in children less then two years old (82.6%) compared with older children (57.1%), p = 0.001. The incidence of Arab children was higher when compared to Jewish children and significantly higher than their percentage in the general child population (p = 0.001). The rate of bronchoscopies was 11 procedures per 100,000 children per year. In the majority of cases food was aspirated (82%) especially nuts and seeds. CONCLUSIONS: We found that children under the age of two years, male children and Arab children were at the highest risk of foreign body aspiration. Nuts and seeds are particularly dangerous and it is recommended to prevent young children from eating them. Well-defined public education programs should achieve prevention.

Adolescent↗

Self-inflicted male urethral foreign body insertion: endoscopic management and complications.

OBJECTIVE: To evaluate the cause, diagnosis, management and complications of self-inserted urethral foreign bodies in men, reviewing a 17-year experience. PATIENTS AND METHODS: From November 1986 to January 2004, 17 men were treated for self-inflicted urethral foreign bodies; the records were analysed retrospectively for presentation, diagnosis, management and complications. RESULTS: In all 17 patients the foreign bodies were clearly palpable. Objects included speaker wire, an AAA battery, open safety pins, a plastic cup, straws, a marble, and a cotton-tipped swab. The most common symptom was frequency with dysuria, but there was sometimes gross haematuria and urinary retention. The cause for inserting the foreign body varied; psychiatric disorder was the most common, followed by intoxication, and erotic stimulation was the cause in only five patients. All patients had diagnostic imaging; plain pelvic images were sufficient in 14, ultrasonography or computed tomography was needed in three. Endoscopic retrieval was successful in all but one patient, where a perineal urethrotomy was required. The most common complications were mucosal tears and false passages. Urethral strictures were associated with multiple attempts to insert the foreign body. CONCLUSION: Self-inflicted urethral foreign-body insertion in men is unusual. A radiological evaluation is necessary to determine the exact size, location and number of foreign bodies. Endoscopic retrieval is usually successful, and antibiotic coverage is necessary. A psychiatric evaluation is recommended for all patients, with appropriate medical therapy when indicated. Late manifestation has included urethral stricture disease, and a close follow-up, albeit difficult in these patients, is desirable.

Adolescent↗

Wooden foreign bodies: imaging appearance.

OBJECTIVE: The purpose of this study was to identify the characteristic imaging features of wooden foreign bodies. MATERIALS AND METHODS: The imaging studies of 12 patients with surgically confirmed wooden foreign bodies were retrospectively reviewed. The study group consisted of seven females and five males, 10-65 years old (mean age, 36 years). All patients underwent radiography. Nine patients were evaluated with sonography, eight with MR imaging, three with CT, and one with CT arthrography. Gadolinium-enhanced MR imaging was performed in six patients. Three patients presented with a draining sinus and nine with painful swelling. Only three patients presented with a history of penetrating injury. RESULTS: Lesions were located in the foot (n = 4), hand (n = 3), thigh (n = 2), calf (n = 2), and elbow (n = 1). Radiographs failed to reveal the retained foreign bodies in all patients. With MR imaging, wooden foreign bodies displayed a variable signal intensity that was equal to or less than that of skeletal muscle on both T1- and T2-weighted images. MR imaging showed the surrounding inflammatory response in all patients. CT showed the retained wood as linear cylindric foci of increased attenuation. Wood was highly echogenic and revealed pronounced acoustic shadowing on sonography. Arthrography in one patient showed an associated reactive synovitis. CONCLUSION: The imaging appearance of wooden foreign bodies is variable; however, imaging can be quite specific, and when taken in the appropriate clinical setting, the imaging should reliably suggest the diagnosis. Sonography is frequently underused but proved most useful for the evaluation of retained wooden foreign bodies.

Adolescent↗

Esophageal foreign bodies in the pediatric population: our first 500 cases.

BACKGROUND: Children with esophageal foreign bodies are frequently seen by pediatric surgeons. Choking and dysphagia are common presentations; however, esophageal perforation has been reported. Historically, rigid esophagoscopy with extraction of the foreign body has been the recommended treatment. Alternatively, Foley balloon extraction is a safe and effective approach. METHODS: Over a 16-year period, 555 children presented with an esophageal foreign body. Retrospective analysis of the medical record was undertaken. Statistics were by univariate analysis. RESULTS: Two hundred ninety-eight boys and 257 girls presented with a mean age of 3.24 years. Dysphagia (37%) and drooling (31%) were the most common symptoms. Foreign bodies were lodged in the superior esophagus in 73%, and 88% of the objects were coins. Balloon extraction with fluoroscopy was performed in 468 children. Eighty percent of the objects were successfully removed with a mean fluoroscopy time of 2.2 min, and 8% were advanced into the stomach. The overall success rate was 88%, with failures necessitating rigid esophagoscopy under general anesthesia. Children younger than 1 year were the most likely to fail (25% failure rate). Airway aspiration never occurred. Significant savings in patient charges were observed with this approach. CONCLUSIONS: Balloon extraction of pediatric esophageal foreign bodies is a safe and cost-effective procedure. This technique is applicable for infants, children, and adolescents. Experienced practitioners should be able to achieve greater than 80% success rate.

Adolescent↗

Management of magnetic intravitreal foreign bodies in 71 eyes.

BACKGROUND AND OBJECTIVE: To evaluate the management of a series of eyes with magnetic intravitreal foreign bodies. PATIENTS AND METHODS: This retrospective review examined consecutive cases of ocular injury associated with intraocular foreign bodies; 71 eyes included had a single metallic intraocular foreign body (< 5 mm) located in the vitreous cavity removed by external magnet or intraocular forceps. Variables included preoperative and postoperative visual acuity, retinal break formation, retinal detachment, presence of an afferent pupillary defect, intraocular pressure, entrance site, foreign body size, method of extraction, and time between occurrence and surgical extraction. RESULTS: Factors predictive of good visual outcome (visual acuity > 20/200) were: shortest interval between trauma and foreign body extraction, preoperative visual acuity of 20/200 or better, and absence of afferent pupillary defect. CONCLUSIONS: In this nonrandomized study, good visual results could be obtained in eyes undergoing prompt foreign body removal, especially those with good preoperative visual acuity and no afferent pupillary defect.

Adolescent↗

Esophageal foreign bodies in children: diagnosis, treatment, and complications.

OBJECTIVE: We performed this study to identify the role of radiology in the diagnosis, treatment, and complications of esophageal foreign bodies in children. MATERIALS AND METHODS: We retrospectively reviewed the charts and radiographs of 123 esophageal foreign bodies seen in 118 children at the Medical University of South Carolina from May 1980 through May 1995. RESULTS: Most foreign bodies were coins in the upper esophagus (69%) in infants less than 2 years old (65%) for fewer than 24 hr (60%). The presenting symptoms varied, with 20% of patients asymptomatic. Respiratory symptoms that mimicked upper respiratory tract infections or croup proved misleading with long-standing foreign body retention. Preexisting esophageal disease was present in 17% of patients. The Foley catheter method of foreign body extraction was attempted in 53 cases (43%) and was successful without complications in 46 (87%). Esophagoscopy was attempted in 72 cases (58%) and was successful without complications in 66 (92%). Three patients had major complications: a fatal aorticoesophageal fistula, an extraluminal migration of a coin, and a large esophageal diverticulum. Significant mucosal erosions were shown in six patients on radiologic studies after extraction. CONCLUSION: Early recognition and treatment of esophageal foreign bodies is imperative because the complications are serious and can be life-threatening. Radiology plays an important role in the initial diagnosis, in recognition of complications, and in treatment. The Foley catheter method of foreign body extraction can be used on some patients, but esophagoscopy remains the safest method of esophageal foreign body extraction.

Adolescent↗

Bronchial foreign body vs asthma.

Between January 1983 and June 1988, 30 unsuspected foreign bodies were extracted from the respiratory tracts of children. Twelve of them showed no roentgenologic findings and their histories revealed repeated hospitalization due to reactive airways disease (RAD) or croup syndrome. As a test-therapy, theophylline, corticosteroids and epinephrine were administered simultaneously to these patients in appropriate doses. No response was obtained in two patients with subglottic foreign bodies (SFB). In seven of the ten patients with bronchial foreign bodies (BFB), wheezing was either decreased or disappeared in the uninvolved lung, but no change was observed in the lung with a foreign body in its main bronchus.

Aminophylline↗

[Intraocular foreign bodies of a non-magnetic nature. Retrospective study].

The analysis of 243 cases with perforative eye injuries with intraocular foreign bodies was performed. Of them 183 were caused by non-magnetic and 60 by magnetic foreign bodies. The increased number of perforative injuries caused by non-magnetic foreign bodies was observed (71,2%). A large number of non-magnetic foreign bodies contained copper (76%). In 74% cases non-magnetic foreign bodies were found in the posterior eye segment. By introducing modern diagnostical and surgical methods (1976) the percentage of removed non-magnetic foreign bodies is significantly higher (93%) compared to the previous period (1961-1975).

Adolescent↗

Tracheal foreign bodies in the cat and the use of fluoroscopy for removal: 12 cases.

OBJECTIVES: To gather information to support the use of fluoroscopically guided removal of tracheal foreign bodies in cats. It was also the intent to produce a case series and look at the long-term outcome following tracheal foreign body removal. METHODS: A retrospective study was performed. This looked at cases of tracheal foreign bodies in cats seen at the University of Bristol veterinary school at Langford over an eight-year period. Outcome was assessed via telephone conversations with the owners. RESULTS: Twelve cats were presented with tracheal foreign bodies during this time. Ten of these foreign bodies were successfully removed using fluoroscopy and two using bronchoscopy. All cats survived. Follow-up was available for nine cats and showed no long-term complications. CLINICAL SIGNIFICANCE: Forceps removal under fluoroscopic guidance is a rapid, safe, and effective method for removal of tracheal foreign bodies in cats. It should be considered as an alternative to bronchoscopy for removal of tracheal foreign bodies in cats. Indeed, in cases where bronchoscopy has failed, it can be attempted to avoid thoracotomy. Successful removal of tracheal foreign bodies in cats is associated with a good long-term outcome.

Animals↗

Bronchoscopic removal of foreign bodies from children in Bosnia and Herzegovina: experience with 230 patients.

OBJECTIVES: To present the experience from an emerging country, in the bronchoscopic removal of foreign bodies in children. METHODS: Retrospective analysis of medical records from 230 patients treated at the ENT Department, Tuzla University Hospital, Bosnia and Herzegovina, between January 1987 and December 1998. RESULTS: Positive bronchoscopic findings were present in 136 (59.1%) cases. Right bronchus (53.7%) and left bronchus (30.1%) were the most frequent location of extracted foreign bodies. The types of extracted foreign bodies were organic in 114 (83.8%), non-organic in 12 (8.8%) and of an indefinite nature in ten (7.4%) cases. The most frequent type of foreign body was: pumpkin seed (23.4%), peanut (18.4%), bean (14.6%). The nature of the foreign body could not be determined in 7.4% cases: either because the foreign bodies were in the state of disintegration or were too small. Two children (0.87%) died during the bronchoscopy. CONCLUSION: Aspiration of foreign body into tracheobronchial tree in children carries a high risk although prompt treatment of survivors is associated with low mortality. Health care education is the key to prevention.

Age Distribution↗