SEARCH · PubMed Health

Results for “ASPIRATION”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 73 records · Page 4Linked to original sources

PubMedDate not supplied

Rapid assessment of Diff-Quik-stained pancreatic aspirates. A retrospective study of 40 intraoperative fine needle aspiration consultations, with measurement of nuclear size of look-alike small tissue fragments by image analysis.

Pancreatic cytomorphology based on Papanicolaou-stained smears has been studied extensively; however, studies on Diff-Quik-stained pancreatic smears are rather limited. Air-dried, Diff-Quik-stained smears lack crisp nuclear details, the cells are flattened on the slides, and the nuclei appear large and hyperchromatic. Between January 1988 and June 1992, 40 cases of intraoperative pancreatic fine needle aspirates were assessed by Diff-Quik stain. The objective of this study was to find practical clues applicable to the rapid and accurate assessment of Diff-Quik-stained pancreatic aspirates for intraoperative consultations. All cases were reviewed and correlated with histopathology. In particular, three cases that proved to be adenocarcinoma on subsequent frozen section but were not so diagnosed during intraoperative fine needle aspiration evaluation were analyzed. The nuclear sizes of small tissue fragments with overlapping nuclei, including three cases of normal pancreatic acini (mean diameter, 0.98, 1.17 and 1.04 x RBCs; coefficient of variation, 0.53, 0.83 and 0.62 x RBCs), 2 cases of islet cell tumor (mean diameter, 1.19 and 1.32 x RBCs; coefficient of variation, 1.88 and 1.4 x RBCs) and 3 cases of adenocarcinoma (mean diameter, 1.55, 1.86 and 1.72 x RBCs; coefficient of variation, 1.5, 1.7 and 1.9 x RBCs) were obtained with an image analyzer. The adjacent RBCs served as internal size controls. In Diff-Quik-stained, air-dried smears we relied on the accurate identification of pancreatic acini, which had the same size as the adjacent RBCs. Islet cell tumors had slightly larger nuclei, which were much more variable in size. The nuclei of adenocarcinoma were much larger than the surrounding RBCs and also showed marked variation in size. The composition of the pancreatic aspirate is important: ductal epithelium predominates in ductal carcinoma, and acini predominate in pancreatitis.

Adult↗

PubMed1998

[An animal model of aspiration and aspiration pneumonia using lacZ gene expression in lungs by adenoviral vectors].

To examine the relationship between disturbed upper airway reflexes and aspiration pneumonia, we administered a total volume of 20 microliters of Ad-CMV-lacZ (Ad vector) or 20 microliters of phosphate buffer solution (PBS) intranasal to C57 black mice. In nostrils, the lacZ gene expression was investigated in each mouse with or without anesthesia. Under anesthesia, the lacZ gene expression was detected by Xgal staining in the lungs of every mouse given the Ad vector. However, no gene expression was measured in the lungs of those given the Ad vector without anesthesia. In mice treated with PBS, there was no lacZ gene expression in the nostrils, trachea, or lungs, irrespective of anesthesia. These results suggest that unconsciousness or disturbed upper airway reflexes caused by anesthesia caused aspiration, resulting in an intranasal bolus that can reached the lower airways. This process can be analyzed in mice tracted with adenovirus vectors carrying the E. coli LacZ gene. Mice given Ad-CMV-lacZ transnasally can be used to study aspiration pneumonia in relation to unconsciousness.

Adenoviridae↗

PubMed2000

Adhesion of aspirated tumor cells to extracellular matrix proteins: a new methodology utilizing fine-needle aspiration.

BACKGROUND: Cell adhesion molecules mediate the interactions of cells with other cells and with extracellular matrix components. Such interactions may be important in the development of tumor invasion and metastasis. This article describes a new approach to the evaluation of tumor cell-matrix interactions by utilizing fine-needle aspiration of resected tumors. METHODS: Fine-needle aspiration was performed on 15 fresh surgical specimens of various types of carcinomas. After partial purification by isotonic Percoll centrifugation, tumor cell adhesion to collagen Type IV, laminin, and fibronectin was evaluated by counting cytologically malignant cells adhering to matrix-coated plastic substrates. Frozen tissue sections of the corresponding tumors were studied simultaneously for immunohistochemical expression of alpha-2, alpha-3, alpha-4, and alpha-5 integrin subunit expression. Results of the immunohistochemical staining then were compared with the adhesion data for particular tumors. RESULTS: In general, the majority of the tumors exhibited little or no adhesion to collagen or laminin, but several tumors showed marked adhesion to fibronectin. Striking differences were noted between some tumors of the same histologic subtype. Competitive inhibition studies performed with two of the tumors (a large cell carcinoma and a renal cell carcinoma) showed decreased adhesion to fibronectin in the presence of anti-alpha-5, suggesting at least a partial role for the alpha-5-beta 1 fibronectin receptor in mediating the adhesion of these tumors to fibronectin. All the tumors examined exhibited strong immunohistochemical expression of the alpha-2 and alpha-3 integrin subunits, and all were negative for alpha-4. Three of the tumors showed weak expression of alpha-5, two of which (a squamous cell carcinoma and a renal cell carcinoma) were the tumors that showed the greatest adhesion to fibronectin. CONCLUSIONS: Quantitative adhesion data can be obtained using cell suspensions prepared from fine-needle aspirates, and there are marked differences in adhesive properties between particular tumors. Although two of the tumors showed a correlation between adhesion to fibronectin and immunohistochemical expression of the alpha-5 integrin subunit, matrix adhesion does not necessarily correlate with immunohistochemical expression of adhesion molecule receptors. In the future, this methodology potentially could be of value in determining which patients may benefit from therapies aimed at modifying tumor cell-matrix interactions.

Biopsy, Needle↗

PubMed2005

Thyroid fine-needle aspiration biopsy in children and adolescents: experience with 218 aspirates.

To evaluate the role of fine-needle aspiration (FNA) biopsy of thyroid nodules in pediatric and adolescent patients, the cytology reports of 218 thyroid FNA biopsies performed on children and adolescents ranging from 10 to 21 yr of age were reviewed. The cytology diagnoses were categorized into four groups: unsatisfactory, benign, suspicious, and malignant. One hundred nineteen (54%) of the aspirates were diagnosed as "benign," 20 (9%) were diagnosed as suspicious for malignancy; and 17 (8%) were diagnosed as malignant. Sixty-two (28%) of the aspirates were read as unsatisfactory for interpretation. Sensitivity of thyroid FNA in diagnosing thyroid malignancy relative to final histological diagnoses was 100%, and specificity was 65%. FNA of thyroid nodules in the pediatric and adolescent population is comparably as sensitive and specific as in the adult population. The acceptance of this procedure in the routine evaluation of young patients' thyroid nodules should reduce the number of unnecessary surgeries for benign thyroid disease.

Adolescent↗

PubMed1985

Comparative study of ultrasonically guided percutaneous aspiration with local anesthesia and laparoscopic aspiration of follicles in an in vitro fertilization program.

Twenty patients from our in vitro fertilization program were randomly divided into two groups. Ten women underwent follicular aspiration during laparoscopy while they were under general anesthesia and 10 women had an ultrasonically guided follicular aspiration with local anesthesia. All patients had mechanical infertility, and ovulation was induced with human menopausal gonadotropins. In both groups the same aspiration system with a needle of 1.4 mm inner diameter and a continuous suction at 120 mm Hg were used. In the laparoscopy group the oocyte recovery rate was 82.5% and the fertilization rate 62.5%, with one twin pregnancy; in the ultrasound group the oocyte recovery rate was 75%, and the fertilization rate 61.9%, with a singleton pregnancy. Implications of these results are discussed.

Adult↗

PubMed1987

Outpatient diagnostic endometrial aspiration curettage with a new aspiration curette.

During a period of 2 years (1981-1982), 226 outpatient endometrial aspiration curettages (EACs) were performed with a new aspiration curette that had been developed by the authors. All patients had risk for general anesthesia. From 17 of them, endometrial polyps were removed by the EAC. Endometrial carcinoma was diagnosed in eight others, adenomatous hyperplasia in four, and cystic hyperplasia in two women. The main advantage of the new curette is the ability to aspirate endometrial polyps through its modified opening.

Adolescent↗

PubMed1993

The combination of aspiration needle biopsy with fine needle aspiration in the preoperative evaluation of breast tumors.

During a period of 10 years, 2906 women (mostly asymptomatic) were referred to us for physical breast examination. Fine needle aspiration (FNA) was used to examine a nodule or a breast thickening in 860 of these patients. One hundred and ten of these patients also underwent a large needle biopsy (LNB) to add a pre-operative histological evaluation. LNB was performed with 18-20 gauge needles, without cutting the skin and without adding any significant pain or discomfort to that caused by FNA (aspiration needle biopsy, ANB). Diagnostic sensitivity for cancer was 89% for FNA and 100% for ANB. ANB allowed us to correctly identify two cancers with post-operative stage T1N0M-0, which were diagnosed pre-operatively as benign by FNA. The combination of the two needle aspiration techniques (FNA and ANB) allowed us to diagnose 51 of all the 54 cancers (95%). The predictive value of a diagnosis of definite malignancy was 100% for either FNA or ANB. The predictive value of a diagnosis of suspected malignancy showed a predictive value of 72% for FNA and 70% for ANB. Three benign nodules with pre-operative ANB findings of suspected cancer were correctly diagnosed by FNA. Of the 12 cancers with inadequate ANB findings, 11 were correctly diagnosed by FNA. Sixteen of the cancers correctly identified by ANB showed a post-operative size of 2 cm or less (ten cases) or no metastatic axillary lymph-nodes (nine cases).(ABSTRACT TRUNCATED AT 250 WORDS)

Biopsy, Needle↗

PubMed2004

Conclusions about the effects on fertilization of time from aspiration to incubation and blood in the aspirate depend on the use of appropriate statistical techniques.

OBJECTIVE: To examine the effects of exposure to blood and time from aspiration to incubation on oocyte fertilization. DESIGN: Retrospective, cohort study. SETTING: Hospital-based IVF practice. PATIENT(S): Eighty-two women undergoing IVF procedures. INTERVENTION(S): Patients received a standard gonadotropin protocol or a microdose flare protocol. MAIN OUTCOMES MEASURE(S): Logistic regression was used to estimate odds of nonfertilization, adjusting for maternal age, time from aspiration to incubation, presence of blood in the aspirate, and a time-by-blood interaction. Two statistical methods were used: an analysis that assumed oocytes were independent and an analysis that adjusted for the lack of independence of oocytes within mothers (i.e., cluster-correlated data). RESULT(S): The 82 women contributed 1093 oocytes. In a model with blood dicotomized as present or absent, and with time elapsed and maternal age categorized into quartiles, both time and maternal age were statistically significant when conventional logistic regression was used. In analyses that accounted for clustering within mother, retrieval-to-incubation times more than 4 minutes were associated with an increased risk of nonfertilization, but age and blood were not; there was no evidence of an interaction between time elapsed and blood. CONCLUSION(S): If appropriate statistics are applied, retrieval-to-incubation times more than 4 minutes are associated with increased risk of nonfertilization.

Adult↗

PubMed1994

Stereotactic fine-needle aspiration cytology of nonpalpable breast lesions: an analysis of 258 consecutive aspirates.

BACKGROUND: The role of stereotactic fine-needle aspiration cytology (SFNAC) in the diagnosis of nonpalpable breast lesions is poorly defined. PATIENTS AND METHODS: Data were prospectively collected from 225 consecutive patients with nonpalpable breast lesions who had aspiration cytology followed by immediate surgical excision. RESULTS: Between 1988 and 1993, 258 such procedures were performed. The results of 84 (33%) were interpreted as benign, 84 (33%) as atypical, 28 (11%) as suspicious for malignancy, and 49 (19%) as malignant. In all, 88 (34%) surgical specimens were malignant. SFNAC had an 80% sensitivity, a 96% specificity, a 91% positive predictive value, and an 89% negative predictive value. There were 18 false-negative and 7 false-positive aspirates. CONCLUSIONS: SFNAC for diagnosing nonpalpable breast lesions is moderately sensitive and highly specific, and has a high positive and negative predictive value. In conjunction with mammography and clinical assessment, the procedure is useful for determining which patients with nonpalpable breast lesions may require surgical biopsy.

Adult↗

PubMed2004

Failure of high risk women to produce nipple aspirate fluid does not exclude detection of cytologic atypia in random periareolar fine needle aspiration specimens.

INTRODUCTION: Evidence of hyperplasia with atypia found both on random periareolar fine needle aspiration (RPFNA) and in nipple aspirate fluid (NAF) fluid are associated with an increased risk for breast cancer. AIM: In this study, we report the correlation of NAF production with cytological assessment of ductal cells obtained by RPFNA. METHODS: 113 women at high risk for development of breast cancer attending the Breast Cancer Prevention Clinic at the University of Kansas Medical Center underwent a single NAF collection attempt and RPFNA. RESULTS: NAF was successfully collected in 51% of women. There was no significant difference in age, 5-year Gail risk assessment, menopausal status, hormone use, family history of breast cancer, history of prior atypical hyperplasia/LCIS or history of contralateral DCIS/invasive breast cancer between women who produced NAF and those that did not. The only significant difference between the two groups was in history of prior lactation (p = 0.018). Twenty-seven of the 113 subjects were found to have hyperplasia with atypia by RPFNA was 31% in women who produced NAF versus 16% in those who did not (p = 0.07). CONCLUSION: Although prevalence of RPFNA atypia was numerically higher in NAF producers than non-producers the difference did not reach statistical significance. Failure to produce NAF does not exclude the presence of hyperplasia with atypia by random periareolar fine needle aspiration.

Adolescent↗

PubMed2000

Aspiration cytodiagnosis of small cell malignancies found in fine needle aspirate (FNA) of the liver: an immunocytochemical study.

In this study the features of small cell malignancies found in the liver by fine needle aspiration cytology (FNAC) and immunostains required for a diagnosis and differential diagnosis are presented. The material consisted of 197 fine needle aspirates which were performed under image guidance between January 1982 to October 1999. Of these, 30 were diagnosed as small cell malignancies. The age of patients ranged between 46 and 68 years. The aspirated material was examined using Papanicolaou-stained filter preparations and cell blocks, the latter stained with hematoxylin and eosin and a panel of immunoperoxidase stains. The diagnoses based on a correlation of relevant clinical history, cytohistological findings and immunostaining were: metastatic small cell anaplastic carcinoma of lung (n = 6); neuroendocrine tumour (n = 9); non-Hodgkin's lymphoma (n = 4); well-differentiated cholangiocarcinoma (n = 2); metastatic carcinoma of the prostate (n = 2); metastatic adenocarcinoma (n = 4) and metastatic carcinoma breast (n = 3). This study emphasizes the wide range of neoplasms that enter into the differential diagnosis of small cell malignancies found in the liver and a correlation of clinical, cytohistological and immunostaining findings which seem to be useful in suggesting a diagnosis.

Aged↗

PubMed1992

Measuring proliferation in routine fine needle aspirates. Immunocytochemical detection of bromodeoxyuridine incorporation and Ki-67 expression in breast aspirates.

Two simple quantitative means of measuring tumour proliferation which can be applied to cytological material are described. One method involves immunocytochemical staining of cytological smears prepared from breast aspirates with the monoclonal antibody Ki-67. The other method involves incubation of aspirated material with 5-Bromo-2-deoxyuridine (BrdU). Direct measurement of the S phase of the cell cycle is feasible in breast fine needle aspirates by Bromodeoxyuridine incorporation and subsequent immunocytochemical detection. The proliferation indices obtained correlate with those derived from Ki-67 staining. This technique is suitable for routine use in the assessment of tumour proliferation.

Antibodies, Monoclonal↗

PubMed2003

Life threatening haemorrhage after anterior needle aspiration of pneumothoraces. A role for lateral needle aspiration in emergency decompression of spontaneous pneumothorax.

Needle aspiration is a recognised emergency treatment of spontaneous pneumothorax and in the case of suspected tension is usually performed before chest radiography. Three cases are described of apparent life threatening haemorrhage after anterior aspiration in the second intercostal space, mid-clavicular line (2ICS MCL) requiring resuscitation, and transfer to a cardiothoracic unit. In these patients there was no evidence of haemothorax on initial presentation. Lateral needle aspiration, in the site recommended for chest drain insertion, the 5th intercostal space, anterior axillary line (5ICS ALL) is technically easy and may be a potentially safer option for decompressing pneumothoraces.

Adult↗

PubMed1995

Fine-needle aspiration cytology of benign nodular thyroid disease. Value of re-aspiration.

Fine-needle aspiration cytology (FNAC) has become a widespread procedure for the study of thyroid nodules (TN). Some authors recommend the practice of repeated punctures for their follow-up. This study was done to determine the usefulness of repeated FNAC in patients with benign nodular thyroid disease. We have studied 251 fine-needle re-aspirations performed on 116 females aged 45.6 +/- 14 years with benign nodular thyroid disease. The time elapsed between each consecutive FNAC was 1 year. No patients presented any changes in the size or consistency of their nodular goiters during this period; all FNACs were carried out by the same physician in the same thyroid area according to the Löwhagen technique, with a minimum of two or three aspirations of each nodule, and processed in the same way and valued by the same cytologist without any knowledge of previous cytological diagnoses. These were done using strictly classical criteria (Löwhagen). One hundred and five out of 116 patients (90.51%) with two consecutive FNACs (210) showed identical cytological diagnoses in the two specimens studied. The remaining 11 patients (9.48%) with two FNACs were diagnosed with colloid goiter and cyst alternately. Fifteen out of 19 patients (78.94%) with three FNACs showed identical cytological diagnoses in the three samples and the rest (21%) also demonstrated alternate diagnoses of colloid goiter and cyst. Our results show that the routine performance of repeated FNAC in the follow-up of females with benign nodular thyroid disease, without any clinical changes, is of limited usefulness.

Adult↗

PubMed2000

[The aspiration and swallowing of foreign bodies. The management of the aspiration or swallowing of foreign bodies during dental treatment].

The purpose of this article is to draw attention to the possible complications of foreign body ingestion or aspiration associated with dental treatment, especially oral implant treatment. A guide for the management of swallowed or inhaled objects is given. When the object cannot be coughed out, then it is mandatory to take frontal and lateral chest roentgenograms to identify the object's position in the intestinal system or in the tracheobronchial tree. In case of ingestion, attempts should be made to recover the foreign object by esophagoscopy. Aspirated foreign bodies should be removed within 24 hours. Acute obstruction can be life threatening and delaying the removal of foreign objects may make a bronchoscopy technically more difficult. The clinician must be aware of the complications involved in accidentally inhaling or ingesting foreign bodies during dental treatment. Patients at greater risk of swallowing or aspirating foreign objects need to be identified and extra preventive steps must be taken to avoid such complications.

Aged↗

PubMed1985

Screening for endometrial carcinoma by endouterine aspiration cytology with analysis of tumor markers in the aspirates. Development and application of a new screening technique.

A new endometrial aspiration technique for office screening of endometrial carcinoma without an anesthesia was studied. In patients without apparent signs of cervical canal stenosis, all of whom were 50 years of age or older, the aspiration attempt was successful in 96%. The aspirates were used for cytologic study and tumor marker assays. The results indicate that screening for endometrial carcinoma should be based on the determination of biochemical tumor markers in the uterine fluid. Lactate dehydrogenase (LD) is recommended as a primary marker, determined as total LD and as LD isoenzyme activity. Endometrial cytology is recommended as a supplementary screening technique in selected cases.

Aged↗

PubMed1983

Comparison of transbronchial fine needle aspiration biopsy, aspiration of bronchial secretion, bronchial washing, brush biopsy and forceps biopsy in the diagnosis of lung cancer.

The accuracy of morphologic diagnosis from transbronchial fine needle aspirates (TBN), bronchial secretions (BS), bronchial washings (BW), brush biopsy (BB) and forceps biopsy (FB) sampled via a flexible fiberoptic bronchoscope, was studied in 60 malignant lung tumours. In visible tumours the best results were obtained with FB (85%) while TBN was positive in 65%. In cases were bronchoscopy only showed secondary signs of tumour, the sensitivity of FB, BB and TBN was higher than that of BW and aspiration of BS. In tumours not visible through the bronchoscope, the diagnostic accuracy of BB, BW and aspiration of BS was higher than that of FB and TBN. In the diagnosis of carcinoma of the lung the diagnostic accuracy of combining FB and one cytologic method (BW) was higher than that of any of the single methods (p less than 0.05) while no appreciable increase was achieved by using additional methods.

Adult↗

PubMed2006

Pepsin, a reliable marker of gastric aspiration, is frequently detected in tracheal aspirates from premature ventilated neonates: relationship with feeding and methylxanthine therapy.

OBJECTIVES: To determine the frequency of pepsin detection in tracheal aspirate (TA) samples of mechanically ventilated premature neonates and its association with feedings and methylxanthine therapy. PATIENTS AND METHODS: Serial TA samples (days 1, 3, 5, 7, 14, 21, 28 and >28 days) were collected from premature neonates receiving ventilatory support. An enzymatic assay with a fluorescent substrate was used to detect pepsin. Pepsin was also measured in 10 serum samples collected in conjunction with the TA samples from 8 neonates. RESULTS: A total of 239 TA samples was collected from 45 premature neonates (mean birth weight, 762 +/- 166 g; mean gestational age, 25.5 +/- 1.5 wk). Pepsin was detectable in 222 of 239 TA samples (92.8%) and in none of the serum samples. Pepsin was significantly lower on day 1 (mean, 170 +/- 216 ng/mL) when compared with all other time points (P < 0.05). Mean concentration of pepsin was significantly lower when infants were unfed (265 +/- 209 ng/mL) compared with levels during feeding (390 +/- 260 ng/mL, P = 0.02). The mean level of pepsin was significantly higher in infants during xanthine therapy (419 +/- 370 ng/mL) compared with no xanthine therapy (295 +/- 231 ng/mL, P = 0.037). CONCLUSION: Pepsin, a marker of gastric contents, was detected in more than 92% of TA samples from premature infants on mechanical ventilation. The level of pepsin was higher in fed infants when compared with unfed infants. Xanthine therapy was also associated with increased pepsin in TA samples. Chronic aspiration of gastric contents may worsen lung disease in premature infants.

Aging↗