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Biomedical subjects

Z P Jing

Publications and source records attributed to Z P Jing.

5 recordsLinked to original sources
PubMed1994

[Air plethysmography in the diagnosis of primary venous insufficiency of lower extremities].

Through the assessment 101 limbs of 77 subjects by air plethysmography (AP), we studied the method of AP test and the values of various indices in diagnosis of primary venous insufficiency (PVI). Venous filling index (VFI) was found valuable to quantitate the venous reflux with its value beyond the threshold of 5 ml/sec. It has a potential value to assess the effect of operations on PVI, such as valvuloplasty aiming to abolish venous reflux. Ejection fraction (EF) was found to be abnormal with its value less than 40%. It may be used to evaluate the function of calf pump quantitatively, predict the ulcer formation, and help make a decision of surgery timely. The comprehensive analysis of VFI, EF, RVF (residual volume fraction) and AVP (ambulatory venous pressure) indicated that there seems to be different types of PVI: type 1, low ejection (low EF) high venous reflux (high VFI); type 2, high ejection low venous reflux; type 3, low ejection low venous reflux. This new classification may impose some on the selection of adequate therapies, which will be further investigated.

Air↗
PubMed1994

[Superficial femoral vein valvuloplasty under direct angioscopic vision].

Superficial femoral vein valvuloplasty (SFV) under direct angioscopic vision without venotomy was designed and performed in 18 patients (20 limbs), suffering from primary SFV valve incompetence and the primary popliteal vein valve insufficiency. The indication of the operation is that the valves developed completely inborn, but with the effects of postnatal pathogenic factors, the leaflets prolapsed and became redundant, irregular diastema between leaflets emerged and the valve-ring dilated. The operation has several advantages: (1) Angioscopy confirms primary venous valve incompetence. (2) The technique precludes venotomy and valve exposure, reducing the rate of postoperative venous thrombosis. (3) The operation eliminates the blindness of kistner's external surgical technique, overcoming its empiricism. The initial clinic use of the technique has shown that it is of excellent short-term effect without complications.

Adult↗
PubMed1990

[Ultrastructure and elemental composition of pancreatic stones].

Four patients with pancreatic duct stones (PDS) and one with calcium deposits (CD) were diagnosed and surgically cured. The ultrastructure and elemental composition of PDS were studied by scanning electron microscopy and energy dispersive X-ray fluorescence. The results indicated that the outer shell of PDS, with dense texture, contained 96.29% of calcium (Ca), while the amorphous reticular inner nidus mainly contained sulphur (S) and chlorine (Cl). CD and PDS were manifestations in the process of pancreatic stones (PS) formation at different stages. As regards the formation of PS, the depressed gene expression played a key role in the reduction of PSP (Pancreatic Stone Protein), which made pancreatic acini reduce PSP biosynthesis rates. The consequence arising therefrom was that the supersaturated calcium carbonate (CaCO3) in pancreatic juice became inadequately inhibited. Thus the calcium carbonate became crystallized and deposited onto the reticular inner protein nidus (RIPN), which developed from the compilation of micro-protein-plugs that had grown from pathologically hyperconcentrated total proteins (mainly containing lactoferrin) in pancreatic juice. The RIPN gave a basis on which the calcium carbonate precipitated and formed PS.

Calcium↗