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1.
2.
Ketai LH; Williamson MR; Telepak RJ; Levy H; Koster FT; Nolte KB; Allen SE 《Radiology》1994,191(3):665
3.
Howard Litwin 《European journal of ageing》2007,4(2):71-82
The aim of the inquiry was to examine the social network–mortality association within a wider multivariate context that accounts
for the effects of background framing forces and psychobiological pathways. The inquiry was based upon the Berkman et al.
(2000) conceptual model of the determinants of health. Its main purpose was to identify the salient network correlates of 7-year
all cause mortality among Jewish men and women, aged 70 and over, in Israel (n = 1,811). The investigation utilized baseline data from a national household survey of older adults from 1997 that was linked
to records from the National Death Registry, updated through 2004. At the time of the study, 38% of the sample had died. Multivariate
Cox hazard regressions identified two main network-related components as predictors of survival: contact with friends, a social
network interaction variable, and attendance at a synagogue, a social engagement variable. Friendship ties are seen to uniquely
reduce mortality risk because they are based on choice in nature, and reflect a sense of personal control. Synagogue attendance
is seen to promote survival mainly through its function as a source of communal attachment and, perhaps, as a reflection of
spirituality as well. Other possibly network-related correlates of mortality were also noted in the current analysis—the receipt
of instrumental support and the state of childlessness.
The study on which this article is based was made possible by grants from the Israel Ministry of Science and Technology to
the Israel Gerontological Data Center. 相似文献
4.
Braffman BH; Coleman BG; Ramchandani P; Arger PH; Nodine CF; Dinsmore BJ; Louie A; Betsch SE 《Radiology》1994,190(3):797
5.
Laparoscopic cryosurgery for hepatic tumors 总被引:2,自引:0,他引:2
Background: Hepatic cryosurgery has been shown to be a safe technique that may be well suited to a laparoscopic approach.
Methods: The technical feasibility and safety of laparoscopic cryosurgery was explored first in a pig model. Thereafter we performed
the first successful case of laparoscopic hepatic cryosurgery at our institution.
Results: In the animal model, we found that it is possible to safely identify, target, and cryoablate specific lesions in the liver.
Temperature in the peritoneal cavity remained above 35°C, and pathologic examination of the abdominal wall around the cryoprobe
site revealed no damage. We also successfully treated a 62-year-old man with a metastatic colorectal carcinoma deep in the
right lobe of the liver with laparoscopic cryosurgery using a transpleural approach.
Conclusion: We conclude that laparoscopic cryosurgery is feasible for lesions anywhere in the liver. For lesions high on the dome of
the liver, a transpleural approach may provide better access. 相似文献
6.
Kinnison ML; Perler BA; Kaufman SL; Mitchell SE; Kadir S; Williams GM; White RI Jr 《Radiology》1986,160(3):727-730
In situ saphenous vein grafts are being used with increasing frequency for bypass procedures involving the femoral and popliteal arteries. Complications of these procedures include anastomotic stenoses and persistent arteriovenous fistulae that may result in failure of the graft. Balloon angioplasty and embolotherapy with detachable balloons were employed successfully in three or four recent cases of patients with complications from in situ grafts. Tailored angiography is essential for evaluating in situ grafts, and interventional techniques are extremely useful for managing complications. 相似文献
7.
8.
Formation of intrachondral vessels (cartilage canals) in the proximal femoral epiphysis was studied in 13- to 22-week-old human fetuses using a corrosion casting technique and scanning electron microscopy. Several successive morphological stages of angiogenesis occurring inside the hyaline cartilage were distinguished. The process of cartilage vascularization starts with the formation of hairpin loops sent off from the perichondrial vascular network into the adjacent cartilage. A capillary glomerulus is then formed at the leading end, and the entire vascular unit grows in length, assuming a mushroom-like shape. Its further elongation is accompanied by a backward expansion of the capillary network which surrounds a pair of main vessels (arteriole and venule) like a manchette. The subsequent branching of such primary vascular units proceeds according to the same morphological patterns. The resulting tree-like vascular formations become interconnected via their lateral branches. This study clearly supports the invasion theory of cartilage canal formation. 相似文献
9.
Richard A. Perugini Steven H. Quarfordt Stephen Baker Donald R. Czerniach Demetrius E. M. Litwin John J. Kelly 《Journal of gastrointestinal surgery》2007,11(9):1083-1090
Introduction Obese individuals may have normal insulin–glucose homeostasis, insulin resistance, or diabetes mellitus. Whereas gastric bypass
cures insulin resistance and diabetes mellitus, its effects on normal physiology have not been described. We studied insulin
resistance and β-cell function for patients undergoing gastric bypass.
Methods One hundred thirty-eight patients undergoing gastric bypass had fasting insulin and glucose levels drawn on days 0, 12, 40,
180, and 365. Thirty-one (22%) patients with diabetes mellitus were excluded from this analysis. Homeostatic model of assessment
was used to estimate insulin resistance, insulin sensitivity, and β-cell function. Based on this model, patients were categorized
as high insulin resistance if their insulin resistance was >2.3.
Results Body mass index did not correlate with insulin resistance. Forty-seven (34%) patients were categorized as high insulin resistance.
Correction of insulin resistance for this group occurred by 12 days postoperatively. Sixty (43%) patients were categorized
as low insulin resistance. They demonstrated an increase of β-cell function by 12 days postoperatively, which returned to
baseline by 6 months. At 1 year postoperatively, the low insulin resistance group had significantly higher β-cell function
per degree of insulin sensitivity.
Conclusions Adipose mass alone cannot explain insulin resistance. Severely obese individuals can be categorized by degree of insulin resistance,
and the effect of gastric bypass depends upon this preoperative physiology. 相似文献
10.
Intestinal schistosomiasis japonica: CT-pathologic correlation 总被引:1,自引:0,他引:1
Lee RC; Chiang JH; Chou YH; Rubesin SE; Wu HP; Jeng WC; Hsu CC; Tiu CM; Chang T 《Radiology》1994,193(2):539