Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “ASPIRATION”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

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

At least 613 records · Page 34Linked to original sources
PubMed1979

Aspiration using prefilled dental anesthetic cartridges.

The purpose of this study was to make clear if aspiration was possible by the non-aspirating technique using non-aspirating cartridges. Four prefilled anesthetic cartridges used in Scandinavia generally were selected for study. The pressure required for aspiration varied between 130--320 mm Hg. In the majority of cases, aspiration did not occur in the pressure of 320 mm Hg. Thus, if the patient has normal blood pressure- the aspiration occurs very seldom by using non-aspirating cartridges.

Anesthesia, Dental↗
PubMed2006

Needle aspiration as first-line management of primary spontaneous pneumothorax.

BACKGROUND: Initial management of primary spontaneous pneumothorax (PSP) remains a topic of debate. Recent guidelines recommend needle aspiration as the initial strategy for large PSP, but chest tube drainage is still widely used. METHODS: Over a six-year period, we used needle aspiration in all cases of large PSP at our center to assess this technique's efficacy in real-life clinical practice. Our prospective study in the pulmonary intensive care unit of a 680-bed university hospital included patients with a PSP greater than 20%, as estimated by the Light's index. Needle aspiration, performed after local anesthesia, used a plastic intravenous catheter. If it failed, we performed thoracic drainage. RESULTS: The study included 35 patients. The initial success rate of needle aspiration was 69% (n=24/35), the one-week success rate 63% (n=22/35), and the one-year rate 51% (n=18/35). Tolerance of needle aspiration was good except for transient vagal reaction in four patients. No risk factors (age, body mass index, delay before hospitalization, previous pneumothorax, or Light index at inclusion) predicted initial failure of needle aspiration. CONCLUSION: Our results confirmed that needle aspiration is an attractive therapeutic option for patients with large PSP: success was observed in approximately two thirds of cases.

Adolescent↗
PubMedDate not supplied

[Endotrachael aspiration protocol in patients with serious cranial trauma. study of neurophysiological variables].

Aspiration of tracheobronchial secretions can cause noxious effects on neurophysiological variables. Different studies that refer to aspiration of secretions in Serious Cranial Trauma use hyperinsuflation and hyperoxygenation to minimize its repercussion on Intracranial Pressure and thus try to not contribute to the secondary lesion. After reviewing these studies, a protocol of tracheobronchial secretion aspiration was performed in our ICU in patients with serious cranial trauma subjected to mechanical ventilation in order to assess the effect of the aspiration of secretions in the neurophysiological variables following homogeneous and standardized guidelines. Neurological, hemodynamic, oxygenation and ventilation variables were analyzed before, during and after aspiration of secretions. When the results were compared before and during this, we observed a decrease in the Intracranial Pressure with increase of Cerebral Perfusion Pressure (due to increase of Mean Blood Pressure), maintaining the levels of PaCO2 and jugular saturation of O2, with an increase in the airway pressures. After finishing the aspiration process, all the affected values recovered. It is concluded that the aspiration of tracheobronchial secretions in patients with Severe Cranial Trauma, after standardized hyperinsuflation and hyperoxygenation, does not alter the hydrodynamics or brain use of O2.

Adult↗
PubMedDate not supplied

[Repercussion on respiratory and hemodynamic parameters with a closed system of aspiration of secretion].

Aspiration of bronchial secretions is a usual technique that may have an affect on hemodynamic and respiratory parameters of the patient. Our objects has been to assess if there are changes in these parameters based on two different aspiration systems: closed (CS) or open (OS) and to also compare the times used in the process. A clinical trial was performed using the crossing over method in which aspirations were performed to the same patient with the two systems. The onset system was randomized and, after a wash-out period of 3 hours, an alternative system was established. We recorded ventilatory, gasometric (baseline and at five minutes of finishing the technique) and hemodynamic (baseline, during the procedure and at five minutes) variables. The time used in each procedure was recorded. The aspiration was always performed with preoxygenation at 100% during one minute. A total of 26 patients subjected to mechanical ventilation in the assisted/controlled way entered the study and 52 aspirations were studied. We analyzed the data with the Student's t test for paired samples and ANOVA. There were no differences in the comparisons between the different determinations for the hemodynamic and gasometric variables. In the ventilatory ones, we only found a significant increase in the respiratory frequency posterior to the OS in regards to the baseline of the same system (p = 0.016). The time used in the technique was greater for the OS (p < 0.001). It can be concluded from the results that: 1. The aspiration technique does not produce clinically important alterations in the parameters studied. 2. There are no differences between the two aspiration systems. 3. The technique with CS is faster.

Aged↗
PubMed2003

[Techniques and complementary techniques. Endotracheal aspiration, bronchial brushing and bronchoalveolar lavage].

The aim of endotracheal aspiration is to eliminate secretions in patients with an artificial airway. All children with mechanical ventilation must undergo this procedure periodically. The frequency of aspiration depends on the type and quantity of the respiratory secretions and on the patient's clinical status. Aspiration should be performed by two people to maintain a greater degree of asepsis and to optimize stability of the airway and ventilation. Closed aspiration systems are available that allow aspiration without the need to disconnect the patient through a single probe that is constantly protected by a plastic sleeve and isolated from external environment. The most important risks of endotracheal aspiration are hypoxemia, mucosal injury, bronchospasm, arrhythmias, perforation of the airway with development of pneumothorax, accidental extubation, and infections. Bronchial brushing with a protected catheter and brochoalveolar lavage are used to analyze pulmonary infections. These techniques can be performed blind or through fibrobronchoscopy. They can also be used for the diagnosis of noninfectious pulmonary diseases such as alveolar proteinosis, alveolar hemorrhage or histiocytosis. Their adverse effects are similar to those of endotracheal aspiration.

Bronchi↗
PubMed2000

The role of stereotactic cyst aspiration for glial and metastatic brain tumors.

OBJECTIVE: To evaluate the role of stereotactic cyst aspiration in the context of multimodality management of cystic glial and metastatic tumors, we retrospectively reviewed our experience with 38 patients during a 10-year interval. METHODS: All 38 patients had one or more computed tomography or magnetic resonance imaging guided stereotactic cyst aspirations. Twenty-seven patients had glial neoplasms and 11 had metastatic brain tumors. Twenty-two patients underwent cyst aspiration as the initial treatment modality while 15 patients had cyst aspiration following previous treatments. RESULTS: In the immediate postoperative period, 19 of the 27 (70%) patients with gliomas and nine of the 11 (82%) patients with metastatic tumors experienced symptomatic improvement. No procedure-related morbidity was encountered. Twelve patients (31.5%) eventually required a catheter-reservoir system. Thirty-seven percent of patients with cystic glial neoplasms and 18% of patients with metastatic tumors had delayed cytoreductive surgery by craniotomy subsequent to stereotactic cyst aspiration. Reduction in tumor volume following aspiration facilitated Gamma knife radiosurgery in seven patients. CONCLUSION: Single stereotactic aspiration is a low risk procedure that provides immediate relief of symptoms in patients with cystic brain tumors. It appears to be valuable together with the use of other therapeutic strategies.

Brain Neoplasms↗
PubMed2004

Diagnosis of clinical bovine mastitis by fine needle aspiration followed by staining and scanning electron microscopy in a Prototheca zopfii outbreak.

Biopsy by fine needle aspiration together with microbiological examination and scanning electron microscopy were evaluated in diagnosis of clinical bovine mastitis in a Prototheca zopfii outbreak. Fine needle aspiration was performed in 21 mammary quarters from ten Holstein cows presenting clinical mastitis caused by P. zopfii. The algae were previously identified in the microbiological examination of milk collected from these cows. Material aspirated from these 21 mammary glands was submitted to cytological staining (Gram, Giemsa and/or Shor staining). Fine needle aspiration enabled cytological identification of the algae in these 21 mammary glands, from which P. zopfii was isolated in the milk. Simultaneously, five mammary fragments collected by fine needle aspiration from these 21 mammary glands presenting clinical mastitis were also submitted to microbiological examination. P. zopfii was also isolated from these five fragments. Scanning electron microscopy technique also identified three of these five P zopfii strains isolated from mammary fragments collected by cytological aspiration. These results suggest that fine needle aspiration may be an alternative method for the diagnosis of clinical mastitis.

Animals↗
PubMed1973

Fine needle aspiration in the diagnosis of childhood malignant disease in Uganda.

One hundred aspirations using a fine needle have been performed on 94 patients with a suspected diagnosis of malignant tumour, 31 of which were in patients with recurrent tumour. In 90 aspirates where histology was also available there was agreement between histological and cytological diagnosis in 81 (90%). This percentage was identical when only previously undiagnosed tumours were considered (60). In 4 aspirates no cells were obtained from tumours in which a diagnosis was made histologically and in 5 there was disagreement with histology, either regarding the presence of malignancy, or tumour type. The technique of fine needle aspiration is simple, rapid, safe and reliable. It is particularly valuable when emergency treatment is required, necessitating a very rapid diagnosis, or when the tumour is entirely intra-abdominal and the patient is unfit for laparotomy. Repeat aspirates may be performed to assess progress following treatment, or multiple suspected tumour sites may be aspirated to assist staging. The technique may be used to confirm the presence of relapsing tumour. Aspiration cytology may prove valuable as a further dimension in the interpretation of histological sections in a variety of childhood tumours, and in some circumstances may be sufficient in itself to establish a diagnosis.

Adolescent↗
PubMed2000

Improved fine needle aspiration (FNA) cytology results with a near patient diagnosis service for breast lesions.

This study is a review of the quality of FNA cytology results for breast lesions approximately 18 months before and 10 months after a change from a rapid diagnosis FNA service with consultant pathologist aspirators to a conventional FNA service with clinician aspirators of varied experience. The setting was symptomatic breast clinic in a large hospital in rural New Zealand acting as a tertiary referral centre for a population of 550,000. The results were collected retrospectively and prospectively. The quality of results for pathologist aspirators (total 810) and clinician aspirators (total 403) was compared using the definitions of the NHS Breast Screening Program Guidelines for Cytology Procedures and Reporting in Breast Cancer Screening. There were statistically significant differences in specificity (biopsy cases only) with 73% for pathologists and 49% for clinicians, specificity (full) with 74% and 56%, inadequate rate with 23% and 37%, and complete sensitivity with 76% and 67%. The use of pathologist aspirators allowed the specimens to be reported in a few minutes. Specimens taken by clinicians took at least 30 min to report. The financial aspects of the two approaches are discussed. When compared with clinician aspirators, pathologist aspirators obtained better quality results and these were reported more quickly.

Biopsy, Needle↗
PubMed2003

Comparison of an rK39 dipstick rapid test with direct agglutination test and splenic aspiration for the diagnosis of kala-azar in Sudan.

We compared an rK39 dipstick rapid test (Amrad ICT, Australia) with a direct agglutination test (DAT) and splenic aspirate for the diagnosis of kala-azar in 77 patients. The study was carried out under field conditions in an endemic area of north-east Sudan. The sensitivity of the rK39 test compared with splenic aspiration was 92% (46/50), the specificity 59% (16/27), and the positive predictive value 81% (46/57). Compared with the diagnostic protocol used by Médecins sans Frontières, the sensitivity of the rK39 test was 93% (50/54), the specificity 70% (16/23), and the positive predictive value 88% (50/57). Compared with splenic aspirates, the sensitivity of a DAT with a titre > or =1:400 was 100% (50/50), but its specificity only 55% (15/27) and the positive predictive value was 80% (50/62). Using a DAT titre > or =1:6400, the sensitivity was 84% (42/50), the specificity 85% (23/27) and the positive predictive value 91% (42/46). All four patients with DAT titre > or =1:6400 but negative splenic aspirate were also rK39 positive; we consider these are probably 'true' cases of kala-azar, i.e. false negative aspirates, rather than false DAT and rK39 seropositives. There were no false negative DATs (DAT titre < or =1:400 and aspirate positive), but there were four false negative rK39 tests (rK39 negative and aspirate positive). The rK39 dipstick is a good screening test for kala-azar; but further development is required before it can replace the DAT as a diagnostic test in endemic areas of the Sudan.

Adolescent↗
PubMed2002

[Trabecular aspiration in pseudoexfoliative glaucoma--surgery to primarily reduce intraocular pressure].

BACKGROUND: Trabecular aspiration has been discussed during the past few years as a new surgical method in the treatment of pseudoexfoliative glaucoma. In this procedure PEX-material, pigment and detritus are aspirated from the trabecular meshwork. Trabecular aspiration has been evaluated mainly in combination with cataract extraction. This study reports on our first experiences concerning the IOP-reducing effect of trabecular aspiration as a primary surgical method in the management of pseudoexfoliative glaucoma. MATERIALS: 17 eyes of 14 patients (7 m, 7 f; 12 OD, 5 OS; age 71 +/- 6 years) with pseudoexfoliative glaucoma were included in this study and operated on by standardised trabecular aspiration (vacuum max. 200 mm Hg, 180 - 270 degrees, 5 min). Therapy success was defined as an IOP reduction by more than 20 % and less than 21 mm Hg. RESULTS: Therapy success was 82 % (14 out of 17) on the first postoperative day, 50 % after 30 days (8 out of 16) and 23 % after 180 days (3 out of 13). IOP was 26.8 +/- 8.5 mm Hg before surgical intervention, 18.1 +/- 11.4 mm Hg after 1 day, 19.1 +/- 7.9 mm Hg after 30 days and 19.2 +/- 5.2 mm Hg after 180 days. Mean quantity of antiglaucomatous eye drops application was 3.1 +/- 0.9 preoperatively, 0.9 +/- 1.6 after 1 day, 0.8 +/- 1.2 after 30 days and 1.0 +/- 1.3 after 180 days. CONCLUSIONS: Trabecular aspiration achieves a good short-term effect in the reduction of IOP in patients with pseudoexfoliative glaucoma. However, this effect was limited to a few weeks in most patients. Trabecular aspiration as a primary surgical method in the management of pseudoexfoliative glaucoma does not appear to be suitable for long-term IOP reduction.

Aged↗
PubMed1999

Experience with an ultrasonic aspirator in neuroendoscopy.

This report describes the clinical application of an ultrasonic aspirator for endoscopic neurosurgery. Eight patients with intraventricular hematoma with complete tamponade of the ventricular system and marked hydrocephalus were treated with the ultrasonic aspirator for endoscopic neurosurgery. Clinical evaluation and neuroimaging studies were obtained for one month. Removal of hematoma was confirmed on follow-up imaging. The ultrasonic aspirator is operated by electrostriction transducer on low generating power (15-30 watts). Its tube has an outer diameter of 1.8 mm. This aspirator is designed to fragment and aspirate the cattle-liver. On observing the adjacent neural and vascular structures with the neuroendoscope, the massive hematoma within the ventricles is removed with the use of this aspirator. Subtotal removal (> 90% of hematoma volume) was achieved in all patients. All patients tolerated the procedure well. However, postoperative re-rupture occurred in two patients prior to aneurysm clipping following an immediate interval. Three patients with hypertension, two patients with head trauma, and one patient after aneurysm clipping were discharged home within one month after treatment. Preliminary experience with this aspirator has demonstrated its feasibility and safety. Clinical application of this technique is expected in other fields of neurosurgery.

Adult↗
PubMedDate not supplied

The relationship between time of admittance and complications in paediatric tracheobronchial foreign body aspiration.

PURPOSE: Majority of tracheobronchial foreign body aspirations occur in paediatric age group and may constitute a life hazard. We examined the relationship between the time of admittance and complications in children with tracheobronchial foreign body aspiration. MATERIAL AND METHODS: Sex, age, time of admittance, presenting symptoms, radiological findings, and the nature of the foreign body were reviewed retrospectively in patients aged 16 and under follow-up for tracheobronchial foreign body aspiration between January 1990 and January 2005. Cases were randomly assigned into 6 groups based on admittance times. RESULTS: Within 15-year period, 263 children under the age of 16 were followed-up for tracheobronchial aspiration of foreign body. The most commonly aspirated foreign bodies included sunflower seed, peanut, hazelnut, walnut. While the pathology could be detected radiographically in 80.3% (n : 211) of the cases, in 19.7% (n : 52) radiology was normal. All cases had rigid bronchoscopy under general anaesthesia. In 220 cases foreign body was detected and could successfully be removed in 209 cases. The remaining 11 cases required bronchotomy or pneumotomy to remove the foreign body. Among 679 cases operated for bronchiectasis during the same period, 22 cases (3.2%) had foreign body as the aetiology. No complications were observed when the patients presented to the hospital within the first 24 hours after the aspiration while fever, purulent sputum, haemoptysis and bronchiectasis were noted in those presented later. Most of the complications were medically treated. CONCLUSION: Paying medical attention within the first 24 hours after the aspiration of foreign bodies is critical in order to accomplish a complication-free course. Organic foreign bodies and retention period of 30 days and over, constitute major risk factors in the development of bronchiectasis. It is advisable to perform bronchoscopy in the early stages of all suspected cases to avoid serious complications such as bronchiectasis.

Adolescent↗
PubMed1990

Amoebic liver abscess: the effect of aspiration on the resolution or healing time.

Recent sonographic monitoring of patients treated for amoebic liver abscess has shown the healing or resolution time varying between 10 and 300 days. The effect of percutaneous needle aspiration under or resolution time was studied in 36 patients. Nineteen patients had drugs and needle aspiration under ultrasound guide whilst the 17 patients had drugs--metronidazole, diloxanide, and chloroquine--alone. Both groups were monitored clinically and sonographically. Results showed that the abscess cavities of 18 out of 19 patients (94.7%) of the aspirated group and 10 of 17 patients (58.8%) of the non-aspirated group had resolved at the end of three weeks. The difference in response to treatment was significant (P less than 0.02) more so for lesion size more than 6 cm (P less than 0.01). There was also a more rapid clinical response in the aspirated group than in the non-aspirated group, particularly for patients whose lesion size was more than 6 cm (P less than 0.01). In conclusion, percutaneous needle aspiration is safe, enhances clinical recovery, and accelerates resolution particularly in patients with large abscess cavities.

Adult↗
PubMed2002

Etiological diagnosis of childhood pneumonia by use of transthoracic needle aspiration and modern microbiological methods.

Childhood pneumonia is usually treated without determining its etiology. The causative organism can be isolated from specimens of blood, empyema fluid, or lung aspirate, but this is rarely done. The potential of transthoracic needle aspiration for identification of causative agents was tested with use of modern microbiological methods. Aspiration was performed for 34 children who had radiological signs compatible with community-acquired pneumonia and had alveolar consolidation. In addition to bacterial and viral cultures and viral antigen detection, nucleic acid detection for common respiratory pathogens was performed on aspirate specimens. Aspiration disclosed the etiology in 20 (59%) of 34 cases overall and in 18 (69%) of 26 patients from whom a representative specimen was obtained. Aspiration's advantages are high microbiological yield and a relatively low risk of a clinically significant adverse event. Aspiration should be used if identification of the causative agent outweighs the modest risk of the procedure.

Adolescent↗
PubMed1976

Thin-needle aspiration biopsy. A personal experience with 469 cases.

The thin-needle aspiration biopsy technic was used in 469 cases to diagnose benign and malignant tumors. The success of the technic depends upon careful examination of the lesion to be biopsied and attention to the details outlined in procuring the aspiration material and preparing the smears. The most important technical consideration is creating a simulated tissue pattern in the preparation of the smears. Routine Papanicolaou, May-Grünwald-Giemsa, metachrome B, and hematoxylin and eosin stains are all useful. Special stains may provide additional evidence for specific diagnoses. Lymph nodes were the most common tissue examined by aspiration biopsy in this series. It was possible to identify the primary tumor site from the aspiration smear in most of the cases. Forty-seven breast cancers were identified from 127 aspiration biopsies of breast lumps. Breast aspirations are the most difficult to interpret, and no deviation from classic malignant smears should be attempted. The false-negative rate for breast aspirations was 7.0%. No delay in treatment occurred because of a false-negative report. Patient acceptance of the procedure was excellent.

Biopsy, Needle↗
PubMed1979

Comparison of stainable iron in aspirated and needle-biopsy specimens of bone marrow.

A comparison of stainable iron in simultaneously obtained aspirated smears and needle-biopsy specimens from 1,000 patients was undertaken. Significant differences occurred when iron was assessed as absent in the aspirated smear. In only 35% of the corresponding needle-biopsy specimens was iron absent. When only the aspirated smear was used, there was a significant overdiagnosis of iron deficiency. In general, iron tended to be less in the aspirated smear; however, correlations were better when iron stores were assessed as being present or increased in the aspirated smears, for stainable iron in the needle-biopsy specimen was always present in equal or greater amounts. Hemosiderotic smears (increased stainable iron) and needle-biopsy specimens (3+ -4+) correlated well. The aspirated smear and needle-biopsy are complementary procedures, and each has advantages. In the authors' experience, the needle-biopsy was preferable to the aspirated smear for evaluation of iron stores, particularly when iron stores were low or absent.

Biopsy, Needle↗
PubMed1984

Bone marrow biopsy technic. Artifact induced by aspiration.

Bone marrow aspiration and trephine biopsy specimens are of additive value when assessing various marrow disorders. Many physicians obtain both an aspirate and a trephine core when taking a biopsy of bone marrow, but opinions differ about which biopsy specimen should be obtained first. Some authors mention the possibility of artifactual hypocellularity and hemorrhage in the trephine biopsy specimen when trephine biopsy follows aspiration at the same site. This report describes the occurrence and significance of bone marrow aspiration artifact. The artifact usually occupies a relatively small area of the biopsy specimen and satisfactory evaluation of the marrow is still possible. However, the artifact occasionally hinders marrow evaluation, particularly when the trephine biopsy specimen is relatively short. Because the artifact is not observed in specimens obtained away from the aspiration site, it is best to perform the trephine biopsy before aspiration, or away from the aspiration site, especially when technical problems prevent obtaining a large amount of trephine material.

Biopsy, Needle↗