EA204对兔离体主动脉的影响

目的 研究雌酚酮衍生物EA204对兔离体主动脉的作用及其作用机制.方法 兔主动脉环离体实验.结果 EA204(10-5～3×10-3mol/L)可以剂量依赖性地抑制氯化钡、氯化钾、去甲肾上腺素引起的兔离体主动脉环的收缩.兔离体主动脉环经亚甲基蓝或吲哚美辛预处理后,分别可使10-5-10-4或10-4×10-3mol/LEA204的舒张作用受抑制;经普萘洛尔预处理后,对FA204(10-5～3 × 10-3mol/L)的舒张作用无影响.结论 EA204舒张兔离体主动脉的作用与N0-cGMP途径及前列腺素合成酶途径有关.     

The connection between personnel resources with work loading and patient satisfaction on in-patient wards

Aim  The aim of the study is to describe the connection between the burden of nurses' work experience and patient dissatisfaction using electronic indicators available in databases.
Background  The hospitals in this study have a lot of information stored in electronic databases, but the data is stored in different databases and there are no straight connections between them.
Methods  This study was retrospective. Inpatient rates, workload statistics, patient classification, patient satisfaction and financial statistics were collected on 39 hospital wards from electronic databases. The data were analysed statistically.
Results  The results showed that the higher care intensity index and number of gross treatment days are, the greater was the burden on nurses. The burden was smaller on those wards using a named nurse system.
Conclusions  Nurses' workload varies according to the condition of patients and patient flow. There is a connection between high workload and patient dissatisfaction. Nurse Managers should easily be able to use significant indicators.
Implications for nursing management  Nursing management must have tools that are easy to use in every day workload measurement, burden adjustment and personnel planning in the long run. This article presents patient classification and the number of beds used including daily change percentage of wards as instruments for nursing management.     

Haplotype and genotype effects of the F7 gene on circulating factor VII,coagulation activation markers and incident coronary heart disease in UK men

Background: Evidence for the associations of single nucleotide polymorphisms (SNPs) in the F7 gene and factor (F)VII levels and with risk of coronary heart disease (CHD) is inconsistent. We examined whether F7 tagging SNPs (tSNPs) and haplotypes were associated with FVII levels, coagulation activation markers (CAMs) and CHD risk in two cohorts of UK men. Methods: Genotypes for eight SNPs and baseline levels of FVIIc, FVIIag and CAMs (including FVIIa) were determined in 2773 healthy men from the Second Northwick Park Heart Study (NPHS‐II). A second cohort, Whitehall II study (WH‐II, n = 4055), was used for replication analysis of FVIIc levels and CHD risk. Results: In NPHS‐II the minor alleles of three SNPs (rs555212, rs762635 and rs510317; haplotype H2) were associated with higher levels of FVIIag, FVIIc and FVIIa, whereas the minor allele for two SNPs (I/D323 and rs6046; haplotype H5) was associated with lower levels. Adjusted for classic risk factors, H2 carriers had a CHD hazard ratio of 1.34 [95% confidence interval (CI): 1.12–1.59; independent of FVIIc], whereas H5 carriers had a CHD risk of 1.29 (95% CI: 1.01–1.56; not independent of FVIIc) and significantly lower CAMs. Effects of haplotypes on FVIIc levels were replicated in WH‐II, as was the association of H5 with higher CHD risk [pooled‐estimate odds ratio (OR) 1.16 (1.00–1.36), P = 0.05], but surprisingly, H2 exhibited a reduced risk for CHD. Conclusion: tSNPs in the F7 gene strongly influence FVII levels. The haplotype associated with low FVIIc level, with particularly reduced functional activity, was consistently associated with increased risk for CHD, whereas the haplotype associated with high FVIIc level was not.     

Persistent pain after groin hernia surgery: a qualitative analysis of pain and its consequences for quality of life

Background: Despite a high prevalence of persistent groin pain after hernia repair, the specific nature of the pain and its clinical manifestation are poorly known. The aim of this study was to determine the type of post-herniorrhaphy pain and its influence on daily life.
Methods: In order to assess long-term pain qualitatively and to explore how it affects quality of life, 100 individuals with persisting pain, identified in a cohort study of patients operated for groin hernia, were neurologically examined, along with 100 pain-free controls matched for age, gender and type of operation. The patients were asked to answer the SF-36 questionnaire, the hospital anxiety and depression scale, the Swedish Scales of Personality (SSP) and a standardised questionnaire for assessing everyday life coping. The patients were approached approximately 4.9 years after surgery.
Results: Twenty-two patients from the pain group had become pain free by the time of examination, whereas 76 patients still had pain, of whom 47 (68%) suffered from neuropathic pain and 11 from nociceptive pain. The remaining patients suffered from mixed pain, neuropathic and nociceptive, or were found to have another reason for pain. All dimensions of SF-36 were poorer for the pain group than the control group.
Conclusion: Persistent post-herniorrhaphy pain is mainly neuropathic and has a substantial impact on health-related quality of life.     

MALIGNANT HISTIOCYTOSIS Histiocytic Medullary Reticulosis

ABSTRACT. Three cases of malignant histiocytosis occurring in children aged 2 months, 10 months and 14 years, are described. In all children the diagnosis was based on anaemia, granulocytopenia or thrombocytopenia, splenomegaly and marked erythrophagocytosis by bone marrow and lymph node atypical histiocytes. Two children aged 10 months and 14 years, underwent splenectomy after which combined chemotherapy with cyclophosphamide, vincristine and prednisone (COP) was started. In the older child a complete remission was achieved. The younger child died soon after the onset of the treatment. The youngest child was treated with bleomycin, adriamycin, cyclophosphamide, vincristine and prednisone (BACOP). He died of pneumonia and sepsis two months after the start of the treatment.     

Effect of timing of surgery,type of inflammation,and sex on outcome of laparoscopic cholecystectomy for acute cholecystitis

BACKGROUND AND PURPOSE: Studies have shown the safety and effectiveness of laparoscopic cholecystectomy (LC) for acute cholecystitis (AC). Our aim was to establish the outcome of LC in patients with AC on the basis of duration of the attack before surgery took place, the type of gallbladder inflammation, and patient sex. PATIENTS AND METHODS: All 204 patients at Princess Basma Teaching Hospital who underwent LC for AC by the authors between September 1994 and June 1999, were retrospectively reviewed. They were categorized into Group I, where surgery took place within 72 hours of the acute attack (N = 78; 54 women and 24 men), and Group II, if later than that (N = 126; 70 women and 56 men). Gallbladder pathology was classified as gangrenous, empyema, edematous, mucocele, or AC along with contracted fibrosed gallbladder. RESULTS: Conversion to open cholecystectomy was needed in 12% of the total series. In Group I, 3.8% of the patients needed conversion compared with 16.7% in Group II patients (P = 0.01). Also, 4% of the female patients needed conversion compared with 24% of the male patients (P = 0.000). There was an association between the pathological type of AC and the likelihood of conversion (P = 0.002), conversion being least common in those with mucocele and most common in those with empyema and gangrene. The median operation time was 75 +/- 36 minutes, but the operation time for Group II patients was significantly longer (P = 0.001) than in Group I patients. Operation time in the male patients was significantly longer than in the female patients (P = 0.000). There was no statistically significant difference in the duration of hospital stay in the two groups or in men and women. There were no deaths or main bile duct injuries in the series. In successful LC, missed stones occurred in 3.3% of the patients. Bile collection, which was treated by open surgery, developed in one female patient. CONCLUSION: Laparoscopic cholecystectomy is a reliable and safe modality for the management of AC. It was not associated with an increased incidence of bile duct injury in this series. It should be the first choice before resorting to open surgery. Factors associated with increased conversion include delay in surgery of more than 3 days from the acute attack and certain pathology, with conversion being more likely in empyema. Conversion also was more likely in male patients.     

Density and functioning of human lymphocytic β-adrenergic receptors during prolonged physical exercise

In order to study the regulation of β-adrenergic receptor number and function in response to prolonged physical effort, lymphocytic β-adrenoceptor density (determined by (-)[¹²⁵I]iodocyanopindolol binding), lymphocytic basal and isoproterenol-stimulated cyclic AMP (cAMP) production and concentrations of plasma catecholamines were measured before and during 3 h running exercise in eight healthy volunteers. A significant (P < 0.01) increase of the lymphocytic β-adrenoceptor density from 45±4 to 81 ± 9 fmol mg^-1 protein (mean ± SEM) took place during the first hour of exercise. As the exercise was continued for up to 2.1–3 h, the receptor densities did not change significantly any more and remained elevated (72 ± 9 fmol mg^-1 protein) in comparison to the resting levels (P < 0.02). The isoproterenol-stimulated cAMP production of the lymphocytes increased during the first hour of running from 190 ± 36 to 269 ± 56 pmol mg^-1 protein (P < 0.01) and returned to the resting level at the end of the exercise (182 ± 38 pmol mg^-1 protein). The mean levels of plasma catecholamines increased ? sixfold during the first hour of exercise and remained elevated until the end of the running. This study demonstrates that the β-adrenergic receptor system is activated in lymphocytes during prolonged aerobic physical exercise. This activated state becomes, however, attenuated within 2–3 h of exercise as indicated by a diminishing ability of β-adrenoceptors to mediate catecholamine-induced cAMP production.     

Responses of intradental nerve fibres to stimulation of dentine and pulp

In the present work responses of intradental nerve fibres to stimuli that induce fluid flow in dentinal tubules as well as to direct mechanical irritation of the exposed pulp were studied on 9 young adult beagle dogs. Under pentobarbitone anesthesia 31 single functional intradental fibre units were dissected from the mandibular nerve. Stimuli were applied to the lower left canine tooth. Exposed dentine surface was irritated by scraping, air blasts and dry absorbent paper and the pulp mechanically with a von Frey hair. Ten fibre units responded to stimulation of dentine. Six of them were also tested with mechanical irritation of the pulp and were all responsive. Fifteen of twenty fibres responded to mechanical stimulation of the pulp. The mechanosensitive nerve fibres were all A-type according to conduction velocities (mean 25.6±8.1 (SD) m/s). It is concluded that there exist mechanosensitive intradental A-nerve fibres in the dog which are activated by stimuli that induce fluid flow in dentinal tubules. Nerve fibres of this type could be responsible for dentine sensitivity in man. Consequently, the present study gives support to the hydro-dynamic hypothesis of dentine sensitivity. Moreover, mechanosensitive nerve fibres could also be responsible for the pain symptoms of pulpal inflammation, because pulpitis may also create suitable circumstances for their activation.     

Effects of PYY and PP on endocrine pancreas

Novel intestinal polypeptide YY (PYY) and pancreatic polypeptide (PP) were infused in fed anaesthetized rats. The peptides (10 and 100 pmol/kg · min) were administered during 30 min, alone, together with glucose or together with arginine. Plasma concentrations of glucose, insulin and glucagon were measured. At the dose of 10 pmol/kg · min the peptides had no effect. PP at the dose of 100 pmol/kg · min slightly augmented basal, but had no effect on stimulated insulin and glucagon release. PYY at the dose of 100 pmol/kg · min was without effect on basal insulin and glucagon levels and on glucose-induced insulin release, but exerted an inhibitory effect on arginine-induced secretion of both insulin and glucagon. It is unlikely that PYY and PP can affect secretion of insulin and glucagon via blood circulation. The potential capability of high doses of PP to affect insulin and glucagon secretion suggests that this peptide may exert direct (paracrine) effects on the pancreatic A-and B-cells