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At least 811 records · Page 45Linked to original sources
PubMed1980

Rapid intracerebroventricular injection assisted by an automatic syringe.

Rapid intracerebroventricular (icv) injections in the conscious mouse are described, using a small volume gas-tight syringe with repeating dispenser device (Hamilton Bonadoz, Switzerland). The device gives reproducibility within 2% of chosen volume, while facilitating rapid icv injections to groups of animals. The technique is used to demonstrate in the mouse the antinociceptive activity of clonidine, using the tail-immersion test.

Analgesia↗
PubMed1994

The syringe aspiration technique to verify endotracheal tube position.

This prospective, clinical study was performed to determine the utility of the syringe aspiration technique (SAT) to verify endotracheal tube (ETT) position. Ninety consecutive patients requiring urgent intubation in the emergency department or prehospital setting were enrolled in the study. The SAT correctly identified intratracheal ETT placement in 88 patients and esophageal misplacement in 2 patients. Ultimately, standard detection techniques were used to confirm ETT placement. The SAT was an accurate means of verifying ETT placement.

Adolescent↗
PubMed1991

Free radicals from plastic syringes.

We have found that disposable sterile plastic syringes can leach free radicals into the fluids they hold. The free radical we observe appears to be a nitroxide (aminoxyl radical) because in aqueous solution it produces a 1:1:1 three line spectrum with a hyperfine splitting constant of 16.9 G.

Electron Spin Resonance Spectroscopy↗
PubMed2006

Extracting Syringe for determination of organochlorine pesticides in leachate water and soil-water slurry: a novel technology for environmental analysis.

The Extracting Syringe (ESy), a novel membrane-based sample preparation technique directly coupled as an autosampler to gas chromatography, has been employed for the analysis of organochlorine pesticides (OCPs) in raw leachate water. The ESy has also been applied for extraction of OCPs from contaminated soil samples and its performance has been compared to liquid-solid extraction (LSE) and accelerated solvent extraction (ASE). Extraction of 3-mL leachate sample at the optimised conditions resulted in enrichment factors from 32 (Endrin aldehyde) to 242 (Endrin) and detection limits from 1 to 20 ng/L. The inter-day and intra-day repeatability (% RSD) at 100 and 500 ng/L were <6% and <24%, respectively. The relative recovery at 100 and 500 ng/L ranged from 68% (Aldrin) to 116% (Endrin aldehyde); except Heptachlor that showed 51 and 60%, respectively. The ESy extraction of the slurry-made soil samples revealed occurrence of Endosulfan I (18.2 microg/g soil), 4,4'-DDE (2.6 ng/g soil), Endosulfan II (8.7 microg/g soil) and Endosulfan sulfate (1.1 microg/g soil); showing good agreement with LSE results. The total ESy consumption of organic solvents was 4.2 mL from which only 0.6 mL n-undecane was used during the extraction step (7 microL for the extraction per se), while in the LSE and ASE, it was 420 and 18.1 mL, respectively. The ESy extraction time (0.5 h) was comparable to the ASE time (0.6 h); and the time required for the LSE was 3.75 h. To sum up, the ESy has shown its competency to LSE and ASE technologies, demonstrating its applicability for environmental analysis of organic pollutants, towards green techniques for green environment.

Acetonitriles↗
PubMed2000

Syringe needle located deep in the brain: image-guided removal.

BACKGROUND: Removal of a thin but long foreign body lodged in the deep brain tissue may need special technique to remove it without causing major injury. We report a special technique for the safe, elective removal of such objects. CASE DESCRIPTION: A 5-year-old boy presented following mild head trauma; he was asymptomatic and physical examination revealed an intact scalp and no neurological deficit. The incidental presence of a 3.4 cm-long syringe needle in the right frontal region was noted on the skull radiographs. Cranial computed tomography (CT) scan showed the deeper end of the needle in the right caudate head and the superficial end at a depth of 3.5 cm from the cortical surface. Burr hole surgery was performed under general anesthesia employing a Fisher stereotactic frame and continuous biplanar guidance from the image intensifiers. The superficial end of the needle was clasped with an endoscopy biopsy forceps, allowing removal of the needle via the least traumatic route. The child had an uneventful recovery. Follow-up magnetic resonance imaging at 6 months did not reveal any abnormality. CONCLUSIONS: The two-dimensional biplanar image-guided stereotactic technique allowed safe removal of a long foreign body from a deep brain location with minimal trauma to the brain.

Brain↗
PubMed2001

An intraoperative irrigation device using disposable syringes and an extension tube: technical note.

BACKGROUND: The authors present a simple irrigation device used in a microsurgical setting. METHODS: The system consists of a disposable i.v. catheter, an extension tube, a three-way stopcock and two disposable syringes, capable of assembly during a surgical procedure. RESULTS: The length of the handpiece of this device is comparable to other microsurgical tools, which allow both the assistant and the surgeon to grab and irrigate in a coordinated fashion. Clots, tumor contents, and tissue debris are effectively washed away. This tool is particularly useful for lavage of subarachnoid clots during surgery for ruptured intracranial aneurysms, allowing precise anatomic orientation. This device is also practical for cooling tissues adjacent to drilling sites. CONCLUSION: This system is as efficacious as other available self-irrigating microneurosurgical instruments.

Disposable Equipment↗
PubMedDate not supplied

Organizational issues in conducting tuberculosis screening at a syringe exchange program.

There has been a rise in tuberculosis (TB) cases in the United States and there is a potent link between human immunodeficiency virus (HIV) and tuberculosis. In New City it is estimated that 40% of the 200,000 injecting drug users are infected with HIV. In addition, the tuberculosis case rate is approximately four times the national average, and one third of these cases occurred in those persons infected with HIV. Drug users have a high prevalence of latent tuberculous infection and are at high risk for progression to active tuberculosis. Drug users are at high risk for both HIV and TB. Although studies have shown the value of incorporating TB services into drug treatment programs, the majority of drug users in the United States are not in drug treatment. We have been evaluating the feasibility of conducting TB screening and directly observed TB preventive therapy for active injecting drug users at a syringe exchange program in New York City. This paper describes issues relating to the implementation of the TB screening program and discusses general and operational issues relevant to integrating medical and public health programs into existing programs serving drug using individuals.

AIDS-Related Opportunistic Infections↗
PubMed1997

Performance of a restrictive flow device and an electronic syringe driver for continuous subcutaneous infusion.

The aim of this study was to investigate the flow performance of the mechanical Springfusor 30 short model and the electronic Graseby MS16A. Flow rate was measured gravimetrically in a temperature-controlled cabinet. There was no statistically significant difference between the Graseby and Springfusor syringe drivers in the flow rate error at 25 degrees C. The percentage of flow rates within +/-20% accuracy during a 35-min periods at 25 degrees C was significantly less with the Graseby, being 91.9% compared with 100% for the Springfusor. Only 58.2% of flow rates with the Graseby were within the manufacturer claimed accuracy of +/-5%. The flow rate of the Springfusor was affected by temperature; at 30 degrees C the mean flow rate was 10.8% greater than at 25 degrees C. These results indicate that the Springfusor 30 had less flow rate variation than the Graseby MS16A. However, this would not be expected to cause noticeable clinical effects when used for opioid infusion in palliative care.

Electronics, Medical↗
PubMed1986

A new ear syringing model.

This article describes a training model which enables a learner of ear syringing to become proficient in the skill before attempting to perform the task on a patient.

Adult↗
PubMed2003

Syringe filtration methods for examining dissolved and colloidal trace element distributions in remote field locations.

It is well-established that sampling and sample processing can easily introduce contamination into dissolved trace element samples if precautions are not taken. However, work in remote locations sometimes precludes bringing bulky clean lab equipment into the field and likewise may make timely transport of samples to the lab for processing impossible. Straightforward syringe filtration methods are described here for collecting small quantities (15 mL) of 0.45- and 0.02-microm filtered river water in an uncontaminated manner. These filtration methods take advantage of recent advances in analytical capabilities that require only small amounts of waterfor analysis of a suite of dissolved trace elements. Filter clogging and solute rejection artifacts appear to be minimal, although some adsorption of metals and organics does affect the first approximately 10 mL of water passing through the filters. Overall the methods are clean, easy to use, and provide reproducible representations of the dissolved and colloidal fractions of trace elements in river waters. Furthermore, sample processing materials can be prepared well in advance in a clean lab and transported cleanly and compactly to the field. Application of these methods is illustrated with data from remote locations in the Rocky Mountains and along the Yukon River. Evidence from field flow fractionation suggests that the 0.02-microm filters may provide a practical cutoff to distinguish metals associated with small inorganic and organic complexes from those associated with silicate and oxide colloids.

Colloids↗
PubMed2006

The use of 31-gauge needles and syringes for intraocular injections.

PURPOSE: To describe the use of disposable 31-gauge needles for intraocular injections. METHODS: Description of the technique and photographs of the needles. RESULTS: Patients feel the injection less and a smaller postinjection bleb is noted. CONCLUSION: Consideration should be given to the use of disposable 31-gauge needles or syringes for intraocular injections.

Angiogenesis Inhibitors↗
PubMed2000

Suction device for epidermal grafting in vitiligo: employing a syringe and a manometer to provide an adequate negative pressure.

BACKGROUND: Suction devices for epidermal grafting need a suction pump to provide a negative pressure. The authors have developed a suction device in which a syringe and a manometer are employed to provide a negative pressure. OBJECTIVE: The purpose of this study was to evaluate the efficacy of our suction device in vitiligo patients. METHODS: The suction device was used to obtain epidermal blisters from the donor site. A CO2 laser was employed to remove the depigmented epidermis. The blister roofs of the donor site were harvested and were placed onto the recipient area. Ten patients with stable vitiligo were treated by epidermal grafting. RESULTS: Epidermal blisters were produced by suction in all patients. Also, all 10 patients regained repigmentation. CONCLUSION: Our suction blister device is simple and inexpensive to make, and it may become an alternative to the other suction devices.

Adolescent↗
PubMedDate not supplied

Does transfusion using a syringe infusion pump and small-gauge needle cause hemolysis?

Hemolysis of two- and nine-day-stored sedimented red blood cells (hematocrit 65%), infused by a constant-rate syringe delivery pump through a 25-gauge needle was investigated. Fifteen-ml aliquots of blood were pumped through the system at flow rates of 10.6, 20.5, and 70 ml/hour. Plasma-free hemoglobin and potassium were measured and compared to controls. Significant red blood cell hemolysis occurred during passage through this infusion system, and the amount of hemolysis was greater with nine-day-stored cells. These cells showed more hemolysis with slower flow rates, but the two-day-stored cells were not affected by rate of flow.

Blood Preservation↗
PubMed2006

Snakes, spiders, guns, and syringes: how specific are evolutionary constraints on the detection of threatening stimuli?

In three experiments, the efficiency in detecting fear-relevant and fear-irrelevant visual stimuli are compared. A visual search paradigm is used where participants are presented with matrices of different sizes (4 objects/9 objects) and must determine whether all objects are taken from the same category or whether there is a discrepant one. Results from all experiments were consistent with the threat-superiority effect. Participants were quicker when the target was threatening than when it was not. Other indicators confirmed that the detection of threatening targets involves more efficient processes (reduced slopes, absence of position effects). A crucial aspect of these experiments was the comparison of evolutionary-relevant (snakes, spiders, etc.) and modern (guns, syringes, etc.) threats. The threat-superiority effect was repeatedly found for both types of target. Stronger effects were sometimes observed for modern than for evolutionary-relevant threats. The implications for evolutionary explanations of the effect of fear on visual attention are discussed.

Adolescent↗
PubMed2003

Ensuring injection safety during measles immunization campaigns: more than auto-disable syringes and safety boxes.

Measles immunization campaigns are effective elements of a comprehensive strategy for preventing measles cases and deaths. However, if immunizations are not properly administered or if immunization waste products are not safely managed, there is the potential to transmit bloodborne pathogens (e.g., human immunodeficiency virus and hepatitis B and hepatitis C). A safe injection can be defined as one that results in no harm to the recipient, the vaccinator, and the surrounding community. Proper equipment, such as the exclusive use of auto-disable syringes and safety boxes, is necessary, but these alone are not sufficient to ensure injection safety in immunization campaigns. Equally important are careful planning and managerial activities that include policy and strategy development, financing, budgeting, logistics, training, supervision, and monitoring. The key elements that must be in place to ensure injection safety in measles immunization campaigns are outlined.

Disposable Equipment↗
PubMed2004

Mechanized syringe homogenization of human and animal tissues.

Tissue homogenization is a prerequisite to any fractionation schedule. A plethora of hands-on methods are available to homogenize tissues. Here we report a mechanized method for homogenizing animal and human tissues rapidly and easily. The Bio-Mixer 1200 (manufactured by Innovative Products, Inc., Oklahoma City, OK) utilizes the back-and-forth movement of two motor-driven disposable syringes, connected to each other through a three-way stopcock, to homogenize animal or human tissue. Using this method, we were able to homogenize human or mouse tissues (brain, liver, heart, and salivary glands) in 5 min. From sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis and a matrix-assisted laser desorption/ionization time-of-flight mass spectrometric enzyme assay for prolidase, we have found that the homogenates obtained were as good or even better than that obtained used a manual glass-on-Teflon (DuPont, Wilmington, DE) homogenization protocol (all-glass tube and Teflon pestle). Use of the Bio-Mixer 1200 to homogenize animal or human tissue precludes the need to stay in the cold room as is the case with the other hands-on homogenization methods available, in addition to freeing up time for other experiments.

Animals↗