Search Results
Results 251 - 300 of 1623
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Shroff Prerana P - - 2009
BACKGROUND AND OBJECTIVE: We wished to examine the efficacy of different media used for inflation of tracheal tube cuffs. METHODS: In our prospective randomized, controlled study over 3 months, there were 150 patients of either sex undergoing surgery under general anaesthesia with controlled ventilation with nitrous oxide and oxygen. The ...
Al-Qahtani Ali S - - 2009
The most common site for the occurrence of intubation-induced tracheal damage is at the area in contact with the inflatable cuff. After the change from high-pressure to low-pressure cuffs, major tracheal lesions still continue to occur. This is a case of tracheal stenosis that occurred after 7 days of intubation ...
Wilson Alison M - - 2009
BACKGROUND: Accumulated secretions after intubation can affect the resistance of an endotracheal tube (ETT). Our objective was to measure extubated patient tubes and size-matched controls to evaluate differences in resistance. METHODS: New ETTs, with internal diameters of 7.0 through 8.5 mm, were tested as controls to establish the resistance of ...
Reilly Christopher W - - 2009
BACKGROUND: Tourniquet cuff pressures in pediatric patients are commonly set at standard pressures. Recent evidence on adult subjects has shown that safer and more effective cuff pressures can be achieved by measuring limb occlusion pressure (LOP) and using a wide contour cuff. There is little evidence validating these techniques in ...
Mestriner Régis Gemerasca - - 2009
BACKGROUND: Positive-expiratory-pressure (PEP) therapy uses positive airway pressure generated by a either a fixed-orifice resistor or a threshold resistor. We hypothesized that tubing diameter and length, and the diameter of the PEP bottle's air-escape orifice would impact the PEP pressure delivered to the airway and determine whether the PEP bottle ...
Muchhala Nathan - - 2009
In a hypothesis that has remained controversial since its inception, Darwin suggested that long-tubed flowers and long-tongued pollinators evolved together in a coevolutionary race, with each selecting for increasing length in the other. Although the selective pressures that flowers impose on tongue length are relatively straightforward, in that longer tongues ...
Drilling Sarah - - 2009
In this work, electrospun tubes of interest for vascular tissue engineering were fabricated and evaluated for burst pressure and suture retention strength (SRS) in the same context as tensile strength providing a direct, novel comparison. Tubes could be fabricated displaying average burst pressures up to 4000 mmHg--well above the standard ...
Kuu Wei Y - - 2009
The purpose of this study was to perform a rapid determination of vial heat transfer parameters, that is, the contact parameter K(cs) and the separation distance l(v), using the sublimation rate profiles measured by tunable diode laser absorption spectroscopy (TDLAS). In this study, each size of vial was filled with ...
Sole Mary Lou - - 2009
BACKGROUND: Endotracheal tube cuff pressure must be maintained within a narrow therapeutic range to prevent complications. Cuff pressure is measured and adjusted intermittently. OBJECTIVES: To assess the accuracy and feasibility of continuous monitoring of cuff pressure, describe changes in cuff pressure over time, and identify clinical factors that influence cuff ...
Büki B - - 2009
By varying the mechanical load on the stapes footplate, intralabyrinthine pressure (ILP) influences the stiffness of the middle ear and modifies its transfer function. This results in a characteristic phase shift of the otoacoustic emissions (OAEs) around 1kHz [Buki, B., Avan, P., Lemaire, J.J., Dordain, M., Chazal, J., Ribari, O., ...
Cinamon Udi - - 2009
OBJECTIVE: To verify and assess immediate middle ear (ME) pressure changes as a function of body position. STUDY DESIGN: A prospective clinical trail. PATIENTS AND METHODS: Twenty-six adult volunteers having 52 normal, healthy ears had tympanometric ME pressures measured in an upright and recumbent positions. Recordings were obtained immediately after ...
Mom Thierry - - 2009
It is known that by influencing stapes stiffness thus the ear's impedance, changes in intracranial and intralabyrinthine pressure induce a characteristic phase shift in otoacoustic emissions (OAE) around 1 kHz in human ears. Thus, if the regulation of pressure in intralabyrinthine compartments were abnormal in Menière patients, OAEs might help ...
Uppal V - - 2009
BACKGROUND: The i-gel (Intersurgical Ltd) is a novel device that differs from other supraglottic airway devices in that it has a softer and a non-inflatable cuff. Our study was designed to assess whether the i-gel is suitable to provide pressure-controlled ventilation (PCV) during anaesthesia by measuring the gas leaks and ...
Sakata Toshifumi - - 2009
OBJECTIVE: To study the association between ear diseases and the ability of the middle ear to sense air pressure changes, we elucidated the appropriate conditions for measurements and confirmed the pressure-sensing regions while quantitatively assessing the pressure-sensing ability of normal ears and of ears with traumatic perforation of the tympanic ...
Brännström K J - - 2009
AIM: To study the effects of hypobaric pressure chamber exposure on the cochlear frequency selectivity of subjects with monaural, fluctuating, low-frequency hearing loss, such as occurs in Ménière's disease. METHODS: We used a hypobaric pressure chamber to create relative underpressure in the ear canal, in order to impose positive pressure ...
Zhou Wei - - 2009
Tracheal stenosis is the most common late airway complication of tracheostomy. Severe tracheal stenosis resulted in hemodynamic deterioration and impairment of respiratory system mechanics. We cared for an 86-year-old man with severe tracheal stenosis due to prolonged placement of a tracheostomy tube for 42-months. At the distal tip of the ...
Mani Navin - - 2009
Insertion of a Lester-Jones tube remains the standard treatment for epiphora secondary to canalicular obstruction. We report on a patient requiring removal of his correctly working Lester-Jones tube to allow him to continue his hobby of scuba diving. This particular complication of the Lester-Jones tube has never previously been reported ...
Holcomb John B - - 2009
OBJECTIVE: Traumatic tension hemopneumothorax is fatal if not treated rapidly. However, whether prehospital decompression is better achieved by chest tube or needle thoracostomy is unknown. We conducted this study to compare the immediate results and prolonged effectiveness of two methods of treatment for traumatic tension hemopneumothorax in a swine model. ...
Eschertzhuber S - - 2009
The LMA Supreme is a new extraglottic airway device which brings together features of the LMA ProSeal, Fastrach and Unique. We test the hypothesis that ease of insertion, oropharyngeal leak pressure, fibreoptic position and ease of gastric tube placement differ between the LMA ProSeal and the LMA Supreme in paralysed ...
Jang Chul Ho - - 2009
BACKGROUND & OBJECTIVE: It has been suggested that increased inner ear pressure can affect the stiffness of the tympano-ossicular conductive system. However, the published literature contains few studies on changes of middle ear mechanics caused by increased inner ear pressure. In this study, we evaluated the effects of increased inner ...
Weiss M - - 2009
BACKGROUND: Cyclic redistribution of air within the cuff during respiratory pressure changes creates a self-sealing mechanism which allows tracheal sealing, despite tracheal airway pressure being above baseline cuff inflation pressure. The aim of the present study was to investigate the effect of continuous automated cuff pressure regulation on tracheal sealing ...
Pau Hans Wilhelm - - 2008
Conclusion. By means of a direct, though non-invasive experiment on healthy humans we could demonstrate that middle ear (ME) pressure decreases when the eustachian tube (ET) does not open. Thus with a very simple method the basic theory of continuous gas loss from the ME into the circulation and the ...
Silva Marta João - - 2008
The objective of this study is to report a case of ischemic subglottic damage after a short-time intubation with a large, overinflated endotracheal tube cuff in a child. The study uses individual case report. A 6-year-old boy was admitted to the pediatric intensive care unit after a head trauma intubated ...
Postaci Aysun - - 2008
OBJECTIVE: To investigate intra cuff pressure changes in low-flow anesthesia (LFA) and high-flow (HFA) N2O anesthesia during moderate-duration surgical procedures. METHODS: We carried out this prospective, randomized, single blind study at Numune Educational and Research Hospital, Ankara, Turkey between January to December 2005. Seventy patients aged between 18-65 years, American ...
Liu Yi-Wen - - 2008
A system with potential for middle-ear screening and diagnostic testing was developed for the measurement of wideband energy absorbance (EA) in the ear canal as a function of air pressure, and tested on adults with normal hearing. Using a click stimulus, the EA was measured at 60 frequencies between 0.226 ...
Sato Hiroaki - - 2009
An 80-year-old woman was intubated with a spiral endotracheal tube via a tracheal stoma during an arytenoidectomy. After being connected to the ventilator, the victim quickly became cyanosed, showed a decrease in blood pressure, and fell into cardiopulmonary arrest. Despite continuous resuscitation, the victim died. Necropsy found a tracheal perforation ...
Chi Chia-Fen - - 2008
The purpose of this study was to examine altered pressure garments requested by burn patients, in Taiwan. Three hundred forty-two pressure garments needing alterations were collected from 127 burn patients at the Sunshine Foundation Organization, an nonprofit organization for burn patients, between March and September 2007, to identify the major ...
Socha John J - - 2008
Rhythmic tracheal compression is a prominent feature of internal dynamics in multiple orders of insects. During compression parts of the tracheal system collapse, effecting a large change in volume, but the ultimate physiological significance of this phenomenon in gas exchange has not been determined. Possible functions of this mechanism include ...
Cho Yang-Sun - - 2009
Pneumatic otoscopy is most helpful for optimally assessing the presence of a middle ear effusion (MEE). To evaluate the diagnostic usefulness and to obtain objective parameters of video pneumatic otoscope (VPO) in ears with MEE, we measured the minimal and maximal pressures in the external auditory canal and recorded the ...
Liu Shing-Hong - - 2008
We propose a new method for assessing the compliance of a compressed brachial artery using an oscillometry-based approach that is mathematically based on artery and air-cuff models. The cuff dynamics during the inflation period were characterized by simultaneously recording the cuff volume and internal pressure with a pressure transducer and ...
Sanford Chris A - - 2008
Wideband acoustic transfer function (ATF) measurements of energy reflectance (ER) and admittance magnitude (|Y|) were obtained at varying static ear-canal pressures in 4-, 12-, and 27-week-old infants and young adults. Developmental changes in wideband ATF measurements varied as a function of frequency. For frequencies from 0.25 to 0.75 kHz there ...
Miao Hongyu H Mechanical Engineering, University of Rochester, Rochester, New York 14627, - - 2008
Various independent investigations indicate that the presence of microbubbles within blood vessels may increase the likelihood of ultrasound-induced hemorrhage. To explore potential damage mechanisms, an axisymmetric coupled finite element and boundary element code was developed and employed to simulate the response of an acoustically excited bubble centered within a deformable ...
Bilgen Cem - - 2009
OBJECTIVE: To assess the effect of inner ear pressure on middle ear impedance in patients with large vestibular aqueduct syndrome (LVAS). METHODS: Data from admittance tympanometry and multifrequency tympanometry on 8 LVAS patients and control subjects were studied. RESULTS: Static acoustic compliance (SAC) values for the ears with stable sensorineural ...
Kudo Michiaki - - 2008
BACKGROUND/AIMS: Patients who have undergone a percutaneous endoscopic gastrostomy have been increasing. However, complications in serious patients are encountered more frequently. We attempted to examine the simple and new technique for the purpose of preventing complications in percutaneous endoscopic gastrostomy patients. By using our method of measuring of the intragastric ...
Thijssen Dick H J - - 2008
Flow-mediated dilation (FMD) has become a commonly applied approach for the assessment of vascular function and health, but methods used to calculate FMD differ between studies. For example, the baseline diameter used as a benchmark is sometimes assessed before cuff inflation, whereas others use the diameter during cuff inflation. Therefore, ...
Fritz M - - 2008
INTRODUCTION: Systolic blood pressure (SBP) is still measured in rats by the tail-cuff method, allowing readings when pulse/flow disappears during cuff inflation and reappears during deflation, separated by a compression interval. Although cuff deflation is habitually used to estimate SBP, we found cuff deflation-cuff inflation pressure to be usually negative, ...
Licina Ana - - 2008
BACKGROUND: Hyperinflation of laryngeal mask airway (LMA) cuffs may be harmful because of the exertion of high pressures on pharyngeal and laryngeal structures. Although cuff manometers may be used to monitor cuff pressure, their use is not routine in many institutions and clinical endpoints are used instead. Furthermore, it is ...
Knobloch Karsten - - 2008
BACKGROUND: The effect of combined cryotherapy/compression versus cryotherapy alone on the Achilles tendon is undetermined. HYPOTHESIS: Standardized combined cryotherapy/compression changes in midportion Achilles tendon microcirculation are superior to those with cryotherapy during intermittent application. STUDY DESIGN: Controlled laboratory study. METHODS: Sixty volunteers were randomized for either combined cryotherapy/compression (Cryo/Cuff, DJO ...
Pedersen Carsten M - - 2009
Intubated patients may be unable to adequately cough up secretions. Endotracheal suctioning is therefore important in order to reduce the risk of consolidation and atelectasis that may lead to inadequate ventilation. The suction procedure is associated with complications and risks including bleeding, infection, atelectasis, hypoxemia, cardiovascular instability, elevated intracranial pressure, ...
Honeck Patrick - - 2009
OBJECTIVE: Despite the large number of surgical techniques for continent cutaneous diversion described in literature, the creation of a reliable, continent and easily catheterizable continence mechanism remains a complex surgical procedure. AIM: Aim of this study was the evaluation of a new method for a catheterizable continence mechanism using stapled ...
Ong M - - 2008
We prospectively assessed common clinical endpoints for their usefulness in avoiding hyperinflation of the cuffs of laryngeal mask airways (slight outward movement) and tracheal tubes (disappearance of an audible leak around the cuff during manual ventilation < 20 cm H(2)O) in 640 children. Cuff pressures were measured at induction and ...
Kiraly Nicholas J - - 2008
Endotracheal tube (ETT) suction is the most frequently performed invasive procedure in ventilated newborn infants and is associated with adverse effects related to negative tracheal pressure. We aimed to measure suction catheter gas flow and intratracheal pressure during ETT suction of a test lung and develop a mathematical model to ...
Malinauskas Richard A - - 2008
The source of hemolysis during hemodialysis must be quickly identified to avoid life-threatening complications. At a single clinic, over a 10-day period in which 550 treatments were performed, 5 case-patients were retrospectively identified for experiencing acute hemolysis (4 deaths) from an unknown origin. The investigation focused on the postpump arterial ...
Ciuman R R - - 2009
The regulation of inner-ear fluid homeostasis, with its parameters volume, concentration, osmolarity and pressure, is the basis for adequate response to stimulation. Many structures are involved in the complex process of inner-ear homeostasis. The stria vascularis and vestibular dark cells are the two main structures responsible for endolymph secretion, and ...
Li-Korotky Ha-Sheng - - 2008
Streptococcus pneumoniae, a leading cause of otitis media (OM), undergoes spontaneous intra-strain variations in colony morphology. Transparent (T) variant is more efficient in colonizing the nasopharynx while the opaque (O) variant exhibits greater virulence during systemic infections. We hypothesized that changes in middle ear (ME) gas pressure/composition during Eustachian tube ...
Kindermann Christine Aparecida - - 2008
OBJECTIVES: We performed a cross-sectional study to investigate whether the obstruction of the eustachian tube orifice due to adenoid hyperplasia changes the pressures in the middle ear. METHOD: Fifty consecutive children 2 to 12 years of age with nasal obstruction were examined from May to October 2005. Adenoid size and ...
Ehrenfeld Jesse M - - 2008
BACKGROUND: Left-sided double-lumen tubes are perceived to be safer than right-sided tubes, because they may be less prone to malposition. If this is true, then the incidence and severity of hypoxemia, hypercapnea, and high airway pressures should be higher for right-sided tubes during thoracic surgery than for left-sided tubes. METHODS: ...
de la Rochefoucauld O - - 2008
Recent measurements of three-dimensional stapes motion in gerbil indicated that the piston component of stapes motion was the primary contributor to intracochlear pressure. In order to make a detailed correlation between stapes piston motion and intracochlear pressure behind the stapes, simultaneous pressure and motion measurements were undertaken. We found that ...
Saeki Hiroshi - - 2008
A nude-type hot-cathode-ionization-gauge head with correcting electrode and shield tube, succeeded in reducing practical pressure-measurement errors caused by an influx of photoelectrons in a synchrotron radiation environment. In the development of this modified Bayard-Alpert hot-cathode-ionization gauge, experimental results showed that a basic ion current generated around the correcting electrode by ...
Markarian Mark K - - 2008
A 15 year old male was an unrestrained passenger in a high speed motor vehicle crash followed by ejection. The patient was noted to have evidence of bilateral pneumothorax upon arrival in the Emergency Department. Bilateral chest tubes were placed under sterile conditions; however, the left pneumothorax remained, and a ...
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