Abstract:
:Ventilation with decelerating inspiratory flow is known to reduce the dead space fraction and to decrease PaCO2. Constant inspiratory flow with an end-inspiratory pause (EIP) is also known to increase the removal of CO2. The aim of the study was to elucidate the effect of the pause/no-flow period while both the pattern and rate of inspiratory flow was unchanged, and when the lung was ventilated with sufficient PEEP to prevent end-expiratory collapse. Surfactant depleted piglets were assigned to decelerating or constant inspiratory flow with 24 breaths per minute (bpm) or 12 bpm, or to constant flow, without and with an end-inspiratory pause of 25%. By adding an EIP the total time without active inspiratory flow of the respiratory cycle was kept unchanged. Gas exchange, airway pressures, functional residual capacity (using sulfurhexafluoride) and haemodynamics (thermo-dye indicator dilution technique) were measured. Irrespective of ventilatory frequency, PaCO2 was lower and serial dead space reduced with decelerating flow, compared with constant inspiratory flow. With an end-inspiratory pause added to constant inspiratory flow, serial dead space was reduced but did not decrease PaCO2. The results of this study corroborate the assumption that total time without active inspiratory flow is important for arterial CO2-tension.
journal_name
Ups J Med Scijournal_title
Upsala journal of medical sciencesauthors
Markström A,Hedlund A,Lichtwarck-Aschoff M,Nordgren A,Sjöstrand Udoi
10.1517/03009734000000044keywords:
subject
Has Abstractpub_date
2000-01-01 00:00:00pages
17-29issue
1eissn
0300-9734issn
2000-1967journal_volume
105pub_type
杂志文章abstract::The present investigation on 20 patients after total hip replacement surgery has confirmed that the posttraumatic increase of the fibrinolysis inhibition activity (FIA) in serum and plasminogen-depleted serum is due to the primary fibrinolysis inhibitor (PFI, alpha 2-antiplasmin). This protein exists in at least two f...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009738209178409
更新日期:1982-01-01 00:00:00
abstract::Determinations were made of the 2-hour 22Na space and the 1 and 2 hour 51Cr EDTA spaces in a number of tissues. In regions where the two 51Cr-EDTA spaces were similar and smaller than or similar to the 22Na space the former spaces were regarded as measures of the extra-cellular volume. Using previously published data ...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009737909179148
更新日期:1979-01-01 00:00:00
abstract::Factors that may influence the water transport through the skin in infants on their first day of life were studied with a method based on determination of the vapour pressure gradient in the air layer close to the skin surface. The evaporation rate from the skin was found to vary with the site of measurement, ambient ...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009738109179207
更新日期:1981-01-01 00:00:00
abstract:BACKGROUND:To achieve a better understanding of the repertoire of receptor tyrosine kinases (RTKs) in adult retinal ganglion cells (RGCs) we performed polymerase chain reaction (PCR), using degenerate primers directed towards conserved sequences in the tyrosine kinase domain, on cDNA from isolated single RGCs univocall...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009731003597119
更新日期:2010-02-01 00:00:00
abstract::In Uppsala, extensive epidemiological and clinical studies on insulin resistance and diabetes have been ongoing for the past 30 years. A prospective cohort study of men born 1920-24, living in Uppsala County, was initiated during 1969-74 (the Uppsala Longitudinal Study of Adult Men, ULSAM). Risk factors for cardiovasc...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章,评审
doi:10.1517/03009734000000060
更新日期:2000-01-01 00:00:00
abstract:BACKGROUND:Minimally invasive laparoscopic radical prostatectomy (LRP) has proven equally effective as open surgery in terms of cancer control and peroperative complication rate with less bleeding and postoperative pain. However, long-term follow-up data after LRP are scarce, especially as related to quality of life (Q...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009734.2013.868560
更新日期:2014-03-01 00:00:00
abstract::The lipid metabolism of isolated mouse pancreatic islets, which had been cultured for one week at 3.3 or 16.7 mM glucose, was examined in short-term experiments performed at the end of the culture period. It was found that: a) high-glucose cultured islets oxidized palmitate at a higher rate: and b) both groups of cult...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009738109179210
更新日期:1981-01-01 00:00:00
abstract::The effect of implantable drug delivery systems on computed tomography (CT) and magnetic resonance imaging (MRI) was investigated in a phantom and in two patients. The implantable systems of identical construction consisted either of medical grade titanium alloy or stainless steel. Images of a phantom showed artefacts...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009738909178560
更新日期:1989-01-01 00:00:00
abstract::Secondary amyloidosis (AA amyloidosis) is a well known cause of nephrotic syndrome and renal failure. Several studies in patients with nephrotic syndrome have suggested a beneficial effect of angiotensin-converting enzyme inhibitors (ACEI). Angiotensin II (ATII) receptor antagonists effect on the long term is not know...
journal_title:Upsala journal of medical sciences
pub_type: 临床试验,杂志文章
doi:10.3109/2000-1967-142
更新日期:2001-01-01 00:00:00
abstract::Bile salt sulphation in primary biliary cirrhosis was studied by measurements of the liver bile salt sulphotransferase levels in 16 patients. Although the enzyme activity varied among the patients it did not correlate with the severity of cholestasis. Furthermore, the mean bile salt sulphotransferase magnitude in pati...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009738309178432
更新日期:1983-01-01 00:00:00
abstract::For the corticotropin-releasing-hormone stimulation test the number of samplings and measurements are reduced to two--and the ratio between concentrations at 60 min and 0 min is calculated. The difference between the information given by absolute concentrations and ratio is negligible, but by using ratio, the influenc...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009739309179325
更新日期:1993-01-01 00:00:00
abstract::Background: Although chronic obstructive pulmonary disease (COPD) is a life-limiting disease with a significant symptom burden, the patients are more often referred to nursing homes (NH), than to specialist palliative care (SPC) at the end of life (EOL). This study aimed to compare patients with COPD in SPC with those...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.1080/03009734.2019.1586803
更新日期:2019-04-01 00:00:00
abstract::Since 1975 Sweden has had a patient insurance system to compensate patients for health-related injuries. The system was initially based on a voluntary patient insurance solution, but in 1997 it was replaced by the Patient Insurance Act. The current Act covers both physical and mental injuries. Although about 9,000-10,...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009730903350749
更新日期:2010-05-01 00:00:00
abstract::Numerous false positive findings are a problem in computed tomography based lung cancer screening trials. The potential patient-related variables that could predict the existence of such lung nodules were studied. 526 construction workers (age 38-81 yrs.) previously screened with spiral computed tomography were evalua...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/2000-1967-242
更新日期:2008-01-01 00:00:00
abstract::Familial aggregation of patients with ovarian carcinoma is unusual. A family with four affected members in three consecutive generations is described. The tumors were all of the serous papillary adenocarcinoma type. The pattern of appearance of the malignant disorder in the present family may be explained as the resul...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009737609179047
更新日期:1976-01-01 00:00:00
abstract:AIM:To gain a deeper understanding of first-time parents' experiences of early discharge from hospital after delivery and home-based postnatal care. MATERIAL AND METHODS:The study was comprised of focus group interviews, interviews with couples and with fathers. Twenty-one parents participated. INCLUSION CRITERIA:hea...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009730903431809
更新日期:2010-05-01 00:00:00
abstract::Diabetes in the mother may cause disturbances in the chondrocyte development in the embryo. A rat model was used to investigate whether this was reflected in the production of proteoglycans by cells from two embryonic regions. One of these regions is resistant (limb bud) and the other susceptible (mandibular arch) to ...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009739009178574
更新日期:1990-01-01 00:00:00
abstract::Thirteen healthy women (age 24-44 yrs) were studied during their menstrual cycle. Samples were taken 2-3 times weekly for six consecutive weeks. Plasma concentrations of oestradiol and progesterone were determined in each blood sample and only women found to be ovulatory were included. From the hormone data the cycles...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009738909178559
更新日期:1989-01-01 00:00:00
abstract:AIM:The aim of this study was to describe content and procedures in some selected Swedish health care quality registries (QRs) of relevance to regulatory decision-making. METHODS:A workshop was organized with participation of seven Swedish QRs which subsequently answered a questionnaire regarding registry content on d...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.1080/03009734.2017.1285837
更新日期:2017-06-01 00:00:00
abstract:BACKGROUND:Open reduction and internal fixation using an interlocking plate system has gained popularity for the treatment of dorsally displaced distal radius fractures. PURPOSE:To evaluate the functional and radiological results of treating unstable distal radius fractures with the volar locking plate. PATIENTS AND ...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009734.2011.594183
更新日期:2011-11-01 00:00:00
abstract:INTRODUCTION:Accumulating evidence suggests that enhanced inflammatory responses contribute to the pathogenesis of postoperative cognitive dysfunction (POCD). Blood transfusion can trigger an enhancement of acute inflammatory responses. Therefore, we hypothesized that perioperative blood transfusion is associated with ...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009734.2013.873502
更新日期:2014-08-01 00:00:00
abstract:BACKGROUND:Shoulder external rotation braces used for patients with a first-time shoulder dislocation are designed with a variety of arm positions in abduction as well as external rotation. However, few studies have focused on their immobilizing performance, comfort, or user-friendliness. Especially, there have been no...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009734.2012.744374
更新日期:2013-05-01 00:00:00
abstract::One hundred and fifty women with a diagnosis of toxaemia of pregnancy treated in the Department of Obstetrics and Gynaecology, University Hospital, Uppsala between 1964 and 1968 were investigated. One hundred women were still living in the area in 1975 and thus could be restudied. The participation rate was 100% in th...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009737809179119
更新日期:1978-01-01 00:00:00
abstract:BACKGROUND:Non-contrast computed tomography (NCT) has become an important diagnostic tool in acute abdominal pain, but the drawback is the increased radiation dose compared to abdominal plain film (APF). PURPOSE:To evaluate whether NCT, including low-dose computed tomography (LDCT, using 50 mAs), provides more diagnos...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009730903294871
更新日期:2010-05-01 00:00:00
abstract:BACKGROUND:Two standard sets of criteria are used to evaluate the tumor response of hepatocellular carcinoma (HCC): RECIST (Response Evaluation Criteria in Solid Tumors) and modified RECIST (mRECIST). The purpose was to compare two tumor response evaluation criteria, RECIST version 1.1 and mRECIST, for HCC treated usin...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章,多中心研究
doi:10.3109/03009734.2012.729104
更新日期:2013-03-01 00:00:00
abstract::By means of an accurate immunoenzymatic assay, the prevalence was studied of antibodies to hepatitis C virus (HCV) in three different populations: 74 patients affected with hepatocellular carcinoma (HCC) on preexisting cirrhosis, 82 patients with liver cirrhosis but with no apparent neoplasm, and 70 control subjects, ...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009739209179300
更新日期:1992-01-01 00:00:00
abstract::Radical surgery for renal cancer with invasion of the inferior vena cava can improve the patient's quality of life and, in some cases, offer longer survival or even cure. With a carefully planned surgical approach it is possible to remove renal tumours with thrombotic extension to the most proximal part of the inferio...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009738509178646
更新日期:1985-01-01 00:00:00
abstract::A method for estimation of the erythrocyte sedimentation from repeated measurements during the initial part of the sedimentation phase is described. Based on the measurements between 18 and 24 minutes after the beginning of the reaction, the sedimentation at 60 minutes is estimated. The estimate is highly correlated t...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/03009739409179362
更新日期:1994-01-01 00:00:00
abstract::Previous experiments have demonstrated that neuronal cells within pancreatic islets survive the isolation procedure and constitute an integral part of transplanted pancreatic islets. The aim of the present study was to investigate to what extent immunosuppressive drugs affects the acute survival of intra-islet neurons...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/2000-1967-167
更新日期:2001-01-01 00:00:00
abstract::Different pharmacokinetic models for target controlled infusion (TCI) of propofol are available in the recently launched open TCI systems. There is also a compelling choice to work with either plasma- or effect-site targets. Knowledge about the clinical consequences of different alternatives is of importance. We aimed...
journal_title:Upsala journal of medical sciences
pub_type: 杂志文章
doi:10.3109/2000-1967-222
更新日期:2008-01-01 00:00:00