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At least 163 records · Page 9Linked to original sources

PubMed1996

Sequential determinations of Blomia tropicalis allergens in mattress and floor dust samples in a tropical city.

BACKGROUND: The mite species Blomia tropicalis is commonly found in tropical and subtropical regions, and it is an important source of allergen in the city of Cartagena, Columbia. AIM: The study was designed to determine seasonal allergen levels of B. tropicalis in homes of patients with asthma and mite allergy. METHODS: Dust samples from mattresses and floors in 20 homes were collected on a monthly basis for 1 year. Outdoor temperature, relative humidity, and rainfall were recorded. RAST inhibition was performed on extracts of dust samples. Allergen levels were compared with variations in climate. RESULTS: B. tropicalis allergens were detected in all mattress samples. More than 50% RAST inhibition was detected in 30% of mattress samples and in 4.3% of floor samples, reflecting a high concentration of allergen. Significant correlations were only found between allergen levels and absolute humidity. CONCLUSION: Levels of B. tropicalis allergen fluctuated minimally in Cartagena, Colombia.

Allergens↗

PubMed2003

A retrospective study to determine the incidence of pressure ulcers in burn patients using a low air loss pressure relieving mattress.

In immobilized patients, unrelieved pressure can create decubitus ulcers over bony prominences. Those burn patients who require prolonged bed rest, are prone to the development of such problems. Various methods of reducing pressure on these areas, including frequent turning and the use of air fluidized and low air loss beds, have been adopted to attempt to prevent the development of this complication. The Pegasus Renaissance alternating pressure mattress is such a device, intended to reduce the incidence of decubitus ulcers. It was introduced at our burn unit and evaluated over a 29-month period. During the study period, 186 (13.4%) of 1390 acutely burned patients, believed to be at high risk for the development of decubiti, were placed on this mattress. Other patients were treated in the standard hospital bed. Care was otherwise the same. No decubitus ulcers developed in any of the patients treated on the Pegasus Renaissance mattress.

Adolescent↗

PubMed2003

A retrospective study to determine the incidence of pressure ulcers in burn patients using an alternating pressure mattress.

Adolescent↗

PubMed2000

The effect of position and mattress on interface pressure.

The aim of this investigation was to determine which positions resulted in the lowest pressures to the skin of persons lying in bed. Pressures were recorded in 10 different lying positions on 2 mattresses in 62 healthy volunteers. The study revealed that the 30 degrees semi-Fowler position and the prone position resulted in the lowest interface pressures. The 30 degrees laterally inclined position had lower pressure readings than the 90 degrees side lying position; 90 degrees side lying position gives the highest pressure readings and thus should be avoided. A Tempur polyethylene-urethane mattress reduces interface pressures by 20 to 30% in comparison to a standard hospital mattress (12-cm-thick cold foam).

Adult↗

PubMed1998

Observations on mattress covers: results of a pilot study.

Samples of covers from three commercially available mattresses were examined in the laboratory using test methods originally devised for testing surgical dressings. These revealed that although the covers shared many common features, there were differences in the conformability and tensile properties which may be of some clinical relevance. The study also confirmed that with some minor modifications, the experimental techniques used would be suitable for a future, more comprehensive review of mattress performance. In a separate investigation designed to examine the consequences of a failure of a mattress cover, the bioburden of a foam core removed from a damaged cover revealed the presence of very large numbers of microorganism, well in excess of 10(10) per gram of foam which could act as a recevoir of contamination and thus a source of cross infection.

Bedding and Linens↗

PubMed2006

End-to-end microvascular anastomosis in the rat carotid artery using continuous horizontal mattress sutures.

This paper reports a continuous horizontal mattress suture technique with advantages such as decreased time for anastomosis, minimized anastomotic leakage, eversion around the vessel edges, and other advantages which the continuous anastomosis technique has. This technique was compared with the classical interrupted and classical continuous suture techniques on a total of 59 Sprague-Dawley rat common carotid arteries: Group 1 (n = 19), interrupted suture technique; Group 2 (n = 20), standard continuous technique, and Group 3 (n = 20), continuous horizontal mattress technique. Early (30 min) and late (21 days) patency rates, anastomosis time, leakage on clamp release, oozing duration, additional sutures needed, and total number of sutures placed were statistically compared between groups. Specimens were taken at the 21st day randomly, and light microscopy (LM), scanning electron microscopy (SEM), and angiographic studies were performed. Results revealed that the continuous mattress suture technique has the advantages of providing a water-tight anastomosis with less suture materials in a shorter time, and minimal intraluminal suture material which can incite thrombosis. On the other hand, a tendency to anastomotic stricture was found to be the sole disadvantage of this technique.

Anastomosis, Surgical↗

PubMedDate not supplied

Respiratory toxicity in mice exposed to mattress covers.

To evaluate factors that might contribute to the rise in prevalence of childhood asthma, we allowed groups of male Swiss-Webster mice to breath the emissions of six brands of waterproof crib mattress covers for 1 h. We used a computerized version of ASTM-E-981 test method to monitor respiratory frequency, pattern, and airflow velocity. Single exposure to the emissions of these mattress covers caused various combinations of sensory irritation, pulmonary irritation, and decreases in mid-expiratory airflow velocity. At the peak effects of these emissions, sensory irritation ranged from 9% to 51% of the breaths, pulmonary irritation ranged from 4% to 16% of the breaths, and airflow limitation ranged from 9% to 38% of the breaths. Three brands caused airflow limitation that persisted for at least 24 h after a single 1-h exposure of naive mice to these emissions. Repeat exposures to the emissions of four brands caused more marked effects (i.e., up to 96% of the breaths showing sensory irritation, up to 44% of the breaths showing pulmonary irritation, and up to 75% of the breaths showing airflow limitation). Histological evaluation of the lungs revealed a mild inflammatory response, with focal collections of polymorphonuclear leukocytes and edema, but there were no eosinophils and no bronchial mucosa changes. We used gas chromatography/mass spectrometry to evaluate one of the test atmospheres, and there was evidence of chemicals for which toxic properties have been documented previously. The results of our study demonstrated that some mattress covers emit mixtures of chemicals that can cause a variety of acute toxic effects in mice, including asthma-like reactions.

Animals↗

PubMed1978

A mechanically-actuated wave mattress.

A polio victim who has been in a negative pressure ventilator ("iron lung") since 1950 was in need of an activated mattress to combat the hallucinatory effects of complete immobilization and to assist with body pressure distribution. A mechanical method was used to give the patient's mattress a moving wave form of vertical amplitude 50mm with a period variable from 50 seconds to infinity. His arms rested on separate supports which oscillated 180 degrees out of phase with the trunk support. The device is powered by a 12 volt electric motor operating through two mechanical reduction gear units. It differs significantly in design and purpose from pneumatic ripple mattresses.

Beds↗

PubMed1997

Comparative effects of sleep on a standard mattress to an experimental foam surface on sleep architecture and CAP rates.

The comparative effects of sleep patterns and rates of cyclic alternating patterns (CAP rate) in a high quality innerspring mattress were compared to those on a unique foam support mattress in 10 normal subjects. Results showed no differences in sleep stages, number of wakes, or total sleep time between the two conditions. CAP rates were significantly reduced on the foam surface. CAP rate was sensitive to the first-night effect on both surfaces, but was blunted on the foam mattress.

Adult↗

PubMed2001

Triangular mattress suture in abdominal diastasis to prevent epigastric bulging.

In the classic abdominoplasty, the treatment of large diastasis recti with simple or vertical mattress sutures may result in a nonaesthetic bulge. The surgeon may produce a craniocaudal bulge deformity by treating the flaccidity in the horizontal plane only, although it occurs in all directions. The authors describe the triangular mattress suture for the treatment of large diastasis recti, and demonstrate the mechanism involved in producing an epigastric bulge. Also presented is their clinical experience with 56 patients, with a 3-year follow-up, using this new plication method. The triangular mattress suture is a simple, quick, and effective way to correct abdominal diastasis and to avoid the epigastric bulge deformity with no added morbidity.

Abdominal Muscles↗

PubMed2001

Electric blanket or mattress cover use and breast cancer incidence in women 50-79 years of age.

Previous research has demonstrated inconsistent associations between electromagnetic radiation, especially from electric blanket use, and breast cancer. Breast cancer risk according to electric blanket or mattress cover use was examined as part of a multicenter population-based case-control study. Breast cancer patients 50-79 years of age (N = 1949) were identified from statewide tumor registries in Massachusetts, New Hampshire, and Wisconsin from the period June 1994 to July 1995. Women of similar age were randomly selected from population lists as controls. Information regarding electric blanket and mattress cover use and breast cancer risk factors was obtained through telephone interviews. After adjustment for age, body mass index, and other breast cancer risk factors, the risk of breast cancer was similar among ever-users (relative risk = 0.93; 95% confidence interval = 0.82-1.06) and lower among current users than among never-users (relative risk = 0.79; 95% confidence interval = 0.66-0.95). There was no evidence of a dose-response relation with increasing number of months that electric blankets had been used. This study provides evidence against a positive association between electric blanket or mattress cover use and breast cancer.

Aged↗

PubMed2003

The buried vertical mattress: a simplified technique for eyelid margin repair.

We describe a new approach for the closure of eyelid margin defects. We conducted a prospective evaluation of patients undergoing the buried vertical mattress technique for full-thickness eyelid margin repair and found that 90 patients (follow-up, 3 to 18 months; average, 6 months) had eyelid margin defects closed with the use of a buried vertical mattress technique. There were no cases of dehiscence, and only 5 (5.5%) patients had minor notch formation. We conclude that the buried vertical mattress suture technique can be a safe and effective method to close eyelid margin defects while saving postoperative time and the cost of multiple sutures.

Eyelid Diseases↗

PubMed2003

Rotation mattress suture: a powerful adjunct for ectropion correction.

We describe an effective adjunctive suture technique for severe forms of both tarsal and marginal ectropion in a case series of 28 patients undergoing the rotation mattress suture technique for ectropion repair. Forty eyelids, followed for 1 to 5 years (average, 2.5 years), underwent tarsal or marginal ectropion repair, using the rotation mattress suture technique. Transient notching was noted in 31 eyelids (78%) but persisted in only 1 case (3%). Twenty-five eyelids (63%) had 0.5 to 1.0 mm of eyelid retraction. There were only 2 cases (5%) of recurrent ectropion. We found that excluding transient changes and predictable, mild lower eyelid retraction, the rotation mattress suture provides a powerful adjunctive reparative option for difficult cases of ectropion with low complication and failure rates.

Ectropion↗

PubMed2004

Differential effect of mattress covers on the level of Der p 1 and Der f 1 in dust.

BACKGROUND: Exposure to house dust mite (HDM) allergens can lead to the development of allergic complaints. Mattress covers seem to be an obvious option for lowering allergen exposure in sensitized individuals. Previous studies have shown that Dermatophagoides pteronissinus was the most prevalent HDM species in the Netherlands. OBJECTIVE: In the present study, we investigated the effect of mattress covers on Der p 1 and Der f 1 concentrations in dust samples in three areas in the Netherlands; Groningen, Utrecht and Rotterdam. METHODS: Dust was obtained from mattresses of 277 patients at the beginning of the study and after 12 months of the placebo-controlled intervention. It was analysed for allergen content by immunoassay. The differential effect of the intervention on Der p 1 vs. Der f 1 was analysed in a subgroup with Der p 1+Der f 1>1 microg/g dust (N=161). It was tested whether the intervention caused a significant change in the Der f 1/Der p 1 ratio. RESULTS: At t=0 we found very similar levels of the group 1 allergens of both species. The relatively high prevalence of D. farinae in our study was geographically restricted: the median Der f 1/Der p 1 ratio was 11.1 in the Rotterdam area compared with 1.32 in the Utrecht area and 0.33 in the Groningen area. Analysis of our data showed that the favourable intervention effect found for the combined allergen data (reduction factor=2.9, P<0.001) is essentially due to a favourable effect of the intervention on the Der f 1 levels only (reduction factor=3.6, P<0.001). The effect on the Der p 1 level was remarkably small (reduction factor: 1.2, P=0.48). In the intervention group, the Der f 1/Der p 1 ratio decreased after 12 months by a factor 2.0, whereas in the placebo group it increased (probability of the intervention effect: P<0.005). CONCLUSION: Mite-impermeable covers are more effective in reducing the level of Der f 1 than that of Der p 1.

Allergens↗

PubMed2002

Intravenous fluids warming by mattress is simple and efficient during pediatric surgery.

BACKGROUND/AIM: Temperature control is essential during pediatric surgery. The effectiveness of two methods of warming intravenous (i.v.) fluids to preserve normothermia was compared during abdominal surgery. METHODS: Intraoperative core temperature (CT) was measured in 59 children, 8 years of age and younger. Patients were randomly allocated to two study groups according to the method of fluids warming. In Group M (n = 30), fluids were warmed by placing the i.v. tubing under a warming mattress, and in Group T (n = 29), by using an active i.v. fluid tube warming system. Observations of CT, infusion fluid temperature (IFT) at the entry to the patient and other relevant parameters were made at 30-min intervals throughout the surgical procedure. RESULTS: The two groups did not differ significantly by age, gender, body weight or length of surgical procedure. Although baseline IFT was significantly lower in Group M than in Group T (33.8 degrees C vs. 35.1 degrees C), it increased during the procedure by 1.2 degrees C in Group M compared to a 0.2 degrees C increase in Group T. Baseline CT was also lower by 0.5 degrees C in Group M compared to Group T (NS), but CT increased in Group M by 1.0 degrees C compared to 0.2 degrees C in Group T, resulting in similar final CTs. CONCLUSIONS: The increase in CT was more pronounced in patients where fluids were warmed under the warming mattress (Group M) than in those with fluids warmed by a coil warming device (Group T). The elevation in CT seen in Group M is associated with an increase in infusion fluid temperature at the line just before the i.v. cannula. Both methods of fluid warming (by placing the i.v. tubing under warming mattress and by using a fluid warming system) effectively preserved normothermia during abdominal surgery in children.

Beds↗

PubMed2006

Buried tension sutures: force-tension comparisons of pulley, double butterfly, mattress, and simple interrupted suture patterns.

OBJECTIVES: To compare suture patterns (simple interrupted, modified pulley, horizontal mattress, double butterfly) by use of a novel in vitro model that quantifies force required for closure against tension. STUDY DESIGN: In vitro study. SAMPLE POPULATION: Suture constructs. METHODS: An in vitro suturing frame was constructed with extension springs to provide a standard resistance against movement of 2 panels of loops toward each other. Four different suture patterns were applied to the frame in randomized trials. The frame was affixed to a tensiometer that measured the force required for each suture pattern to close a fixed distance (3.81 cm) at a constant rate (5.08 cm/min) against the tension (0.6 kg/cm) of the extension springs. The closure distance and tension were selected subjectively to mimic tension encountered clinically during wound reconstruction oncologic surgical procedures. RESULTS: The modified pulley suture required the least force to close, followed by the double butterfly, simple interrupted, and horizontal mattress patterns. CONCLUSIONS: The modified pulley suture and double butterfly suture patterns require less force to close a given distance under tension than either simple interrupted or horizontal mattress suture patterns. CLINICAL RELEVANCE: Application of tension relieving suture techniques for fascia, subcutaneous, and buried-knot subdermal suturing should be considered to facilitate direct closure of wounds under tension. Modified pulley and double butterfly suture patterns offer some mechanical advantage by requiring less force to achieve closure compared with other suture patterns that might be used in reconstructive surgery.

Animals↗

PubMed2004

Comparison of two dust collection methods for reservoir indoor allergens and endotoxin on carpets and mattresses.

Variable methods of dust collection may lead to uncertainty in the measurement of biomarkers. The purpose of this study was to examine the effect of two different dust collection devices on dust weight, Der p 1, Fel d 1, and endotoxin levels. We compared: (1) a nylon mesh sock inserted between the furniture attachment and the vacuum hose (the reference method) and (2) the ALK device. Duplicate dust samples were collected for 2 min from 2 m(2) of 37 living room floors and from each longitudinal half of 37 mattresses. Measurement of Der p 1 and Fel d 1 were by double monoclonal antibody enzyme-linked immunosorbent assay (ELISA) and endotoxin by a Limulus Amobocyte Lysate assay. Geometric mean ratios (95% confidence intervals) were calculated to show the differences between sampling devices for each measurement. Compared with the ALK device, the reference method collected significantly more dust from floors (sevenfold) and mattresses (threefold) and more total Der p 1, Fel d 1, and endotoxin in both sites. Floor, but not mattress, Der p 1 concentrations were also significantly higher (threefold) using our reference method. We recommend that, in order to minimize sampling device bias, allergen and endotoxin are expressed as a concentration, and that the bed is considered the major source of allergen exposure. Practical Implications Dust sampling equipment can influence the dust yield. In order to have confidence in comparisons of allergen and endotoxin reservoir levels between centers, standardization in the use of sampling equipment is important.

Air Pollution, Indoor↗

PubMed1989

Providing warmth for preterm babies by a heated, water filled mattress.

Seventeen healthy preterm babies had extra warmth provided in their cots by thermocontrolled, heated, water filled mattresses. As controls 17 babies of the same weight were nursed in air heated incubators. Both groups were studied for three weeks. No differences were found in minimal oxygen consumption (measured by indirect calorimetry), rectal and mean skin temperatures, or in daily weight gain. The babies were kept just as warm on the heated, water filled mattresses as in air heated incubators but the mattresses had the advantage of giving the mothers easy access to their babies.

Beds↗