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Results for “Device Removal”

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At least 721 records · Page 40Linked to original sources

PubMed1987

Examination of intramammary devices from infected and uninfected mammary quarters by scanning electron microscopy.

Polyethylene intramammary devices were removed from six infected and four uninfected mammary quarters of seven lactating cows and examined by scanning electron microscopy. Infecting organisms included Corynebacterium bovis, coagulase-negative staphylococci, and an unidentified fungus. Intramammary devices from infected quarters had amorphous material adhering to large areas of the polyethylene. Large numbers of inflammatory cells and microorganisms were found concentrated within the material. Devices from uninfected quarters had less amorphous material with few adhering inflammatory cells. The amorphous material appeared to be restricted to abraded surfaces of the polyethylene. Milk somatic cell counts in stripping milk of quarters infected with Corynebacterium bovis and coagulase-negative staphylococci before and 3 wk after removal of intramammary device averaged 1.2 X 10(6) and .2 X 10(6)/ml, respectively. Results suggest that increased cell counts of infected quarters containing intramammary devices were associated with microbial colonization of the amorphous material.

Animal Husbandry↗

PubMedDate not supplied

Removal of completely perforating IUDs by explorative laparotomy.

Nine patients with completely perforating intrauterine contraceptive devices are presented. In all cases, the device was removed by explorative laparotomy. In eight out of the nine women, the device was found to be embedded in the omentum or vesical peritoneal plica. The advantages of explorative laparotomy over laparoscopy or colpotomy are emphasized.

Adult↗

PubMed2002

Protection against lyme disease spirochete transmission provided by prompt removal of nymphal Ixodes scapularis (Acari: Ixodidae).

Public health recommendations for Lyme disease prevention generally include daily tick checks and prompt removal of attached ticks as a means of decreasing the risk of acquiring Lyme disease in highly endemic regions. In the current study, we determined whether crushing nymphal ticks during removal with forceps increased the risk of B. burgdorferi transmission, what degree of protection from transmission of B. burgdorferi was provided by removal of nymphal Ixodes scapularis Say at specific intervals, and whether commercial devices marketed for tick removal worked when tested against nymphal I. scapularis. Both removal via gentle pressure (26% transmission) or crushing the tick (30% transmission) caused a significant decrease in transmission as compared with the sham control (70% transmission). The degree of protection provided via tick removal decreased steadily up to 60 h of attachment; between 60 and 66 h, a dramatic falloff in protection occurred to the point where no protection was observed at 66 h. Finally, commercial tick removal devices varied widely in their efficacy for the removal of attached nymphal I. scapudaris.

Animals↗

PubMedDate not supplied

Minimally invasive exchange tibial nailing for a broken solid nail: case report and description of a new technique.

We present a minimally invasive technique for the removal of a broken solid tibial nail. A special device was invented that minimizes the extraction difficulties. After minimal over-reaming, the device is slid in an antegrade fashion over the nail and locked. Retraction is safe and easy. This article is an illustrative case-presentation describing the device and the surgical technique.

Adult↗

PubMed2006

How we do it: the Owa (Addenbrookes) grommet.

. Grommet insertion is one of the most common procedures performed under general anaesthesia. . The authors describe an innovative grommet that, through an anatomically contoured and user friendly design has been designed to minimize anaesthetic time by facilitating and expediting its placement and/or removal.

Child↗

PubMed1988

An evaluation of the mechanical failure modalities of a rotating hinge knee prosthesis.

The clinical and metallurgical performance of 12 retrieved Noiles total knee prostheses was investigated. Clinical histories and serial roentgenograms were used in conjunction with the American Society for Testing and Materials (ASTM) standard implant retrieval and analysis techniques to assess device performance. All of the devices were removed because of implant loosening with pain, while two devices also had a late infection. The average time in situ for all devices was four years. Roentgenographically, all of the devices showed signs of progressive radiolucencies. Ten (83%) of the devices migrated proximally within the femur. A marked varus drift was observed in eight (67%) of the retrieved prostheses. Hypertrophy of the femoral cortex was observed in eight (67%) of the cases. Seventy-three percent of the polyethylene tibial stems exhibited extensive wear on the anterior and medial aspects of the articulating surface. Extensive wear was also seen on the anterior and extreme posterior aspects in 92% of the polyethylene tibial plateau bearings. This wear was a consequence of the migration of the femoral component leading to buttressing of the plastic components against bone or bone cement. This study indicates serious design flaws in the Noiles knee prosthesis that unless corrected would question the use of the device in either primary or revision knee surgery.

Adult↗

PubMed2005

An insulator-based (electrodeless) dielectrophoretic concentrator for microbes in water.

Dielectrophoresis (DEP), the motion of a particle caused by an applied electric field gradient, can concentrate microorganisms non-destructively. In insulator-based dielectrophoresis (iDEP) insulating microstructures produce non-uniform electric fields to drive DEP in microsystems. This article describes the performance of an iDEP device in removing and concentrating bacterial cells, spores and viruses while operated with a DC applied electric field and pressure gradient. Such a device can selectively trap particles when dielectrophoresis overcomes electrokinesis or advection. The dielectrophoretic trapping behavior of labeled microorganisms in a glass-etched iDEP device was observed over a wide range of DC applied electric fields. When fields higher than a particle-specific threshold are applied, particles are reversibly trapped in the device. Experiments with Bacillus subtilis spores and the Tobacco Mosaic Virus (TMV) exhibited higher trapping thresholds than those of bacterial cells. The iDEP device was characterized in terms of concentration factor and removal efficiency. Under the experimental conditions used in this study with an initial dilution of 1 x 105 cells/ml, concentration factors of the order of 3000x and removal efficiencies approaching 100% were observed with Escherichia coli cells. These results are the first characterization of an iDEP device for the concentration and removal of microbes in water.

Bacillus subtilis↗

PubMed1996

The effect of estradiol benzoate administration on estrous response and synchronized pregnancy rate in dairy heifers after treatment with exogenous progesterone.

The objectives of this trial were to determine the effects of 0.5 mg estradiol benzoate administered intramuscularly 24 h after the removal of progesterone-containing intravaginal devices on the occurrence and timing of estrus, synchronized pregnancy rate and synchronized conception rate in dairy heifers. A clinical trial was conducted involving 750 dairy heifers in 13 herds. Within each herd heifers were randomly allocated to 1 of 2 estrus synchronization treatments. All heifers received a CIDR-B progesterone-containing intravaginal device containing a 10 mg estradiol benzoate capsule for 12 d. Twenty-four hours after CIDR-B removal one group received 0.5 mg, im estradiol benzoate while the other group received an intramuscular injection of a placebo. Estrus detection was performed at 48 and 72 h after intravaginal device removal, and heifers detected in estrus at those times were inseminated. Administration of estradiol benzoate 24 h after removal of CIDR-B devices significantly increased the number of heifers exhibiting estrus within the observation period (96.1 vs 90.5%; P < 0.01). It also altered the onset of estrus so that significantly more heifers were in estrus (86.6 vs 72.3%; P < 0.01) and conceived (47.1 vs 37.5%; P < 0.05) by 48 h after CIDR-B device removal. The synchronized conception rate was unaffected by treatment. The distribution of estrus was such that fixed-time insemination after estrus synchronization with this treatment program may be recommended.

Journal Article↗

PubMed1998

Treatment interference in acutely and critically ill adults.

OBJECTIVES: To examine the state of knowledge of treatment interference, the self-removal of technological devices, in acutely or critically ill adults and to propose a multidisciplinary research agenda to further understanding of this clinical problem. METHOD: A combined computerized and hand search of the nursing and medical literature (MEDLINE, 1966 to June 1996; Cumulative Index to Nursing and Allied Health Literature, 1985 to June 1996; and holdings at the Center for the Study of Nursing History at the University of Pennsylvania) was conducted. Literature on specific technological devices and articles that contained the terms self-removal, withdrawal, devices, self-extubation, unplanned extubation, and involuntary treatment were searched. RESULTS: Literature on treatment interference was found in four main topic areas: (1) maintaining treatment, (2) unplanned extubation, (3) disruption or manipulation of a medical device, and (4) involuntary treatment. CONCLUSIONS: The results clearly establish the clinical importance of treatment interference and underscore the multidisciplinary and multifactorial nature of this perplexing, life-threatening clinical problem. Future research on treatment interference should emphasize systematically building an understanding of the processes involved, including patients' attributes, behavioral cues, and consequences, to develop appropriate multidisciplinary strategies to prevent patients' self-removal of technological devices.

Adult↗

PubMed1984

Percutaneous removal of ureteral stents.

A new device for the removal of ureteral stents by the percutaneous nephrostomy route is presented. We used this device successfully in a 4-month-old male child. Its advantages in the removal of unwanted intracorporeal wanderers such as lost catheters are discussed.

Foreign Bodies↗

PubMed1998

Initial experience with the changeable skin-level port-valve: a new concept for long-term gastrointestinal access.

BACKGROUND/PURPOSE: Experience with a new multipurpose system for long-term enteral access is reported. At the core of the concept is a changeable, skin-level "port" (SL port) that incorporates a valve accessible through a locking, right-angle feeding adapter. The new system allows conversion of a previously-inserted, long gastrointestinal catheter into a "button-type" skin-level device without removal of the long catheter, thereby eliminating pain, tract damage, and the risk of separation of the viscus from the abdominal wall. METHODS: Sixty-four SL ports were used in 44 children (ages 2 weeks to 19 years). Conversion from long tube to skin-level device was performed 33 times, either immediately after the catheter placement or some time thereafter (percutaneous endoscopic gastrostomy, 18; Stamm gastrostomy, 6; laparoscopic gastrostomy, 7; jejunostomy, 2). Insertion as an assembled button-type device in an established tract was performed seven times. Twenty SL ports showing signs of leakage were replaced with an identical device without catheter removal. SL ports remained in place from 1 week to 15 months.

Adolescent↗

PubMed2004