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Z L Tao

Publications and source records attributed to Z L Tao.

12 recordsLinked to original sources
PubMed1992

A study of RBC aggregation-sedimentation phenomenon with conductivity method.

In this paper, we present a conductivity method for measuring the RBC (red blood cell) aggregation-sedimentation phenomenon and the theoretical analysis of this phenomenon. A theory describing the RBC aggregation-sedimentation phenomenon with the conductivity method is proposed and the formula of the l-t function which depicts the RBC aggregation-sedimentation process is given. We put forward the aggregation index and sedimentation factor describing the RBC aggregation-sedimentation phenomenon for the first time.

Animals↗
PubMed1990

[Repair of cranial defect using a revascularized free composite rib-anterior serratus myocutaneous flap--report of 4 cases].

From June 1983 to November 1988, 4 cases of traumatic cranial defect (8 x 8 cm2 to 10 x 15 cm2) were repaired by the use of free revascularized rib (2-5) -musculocutanous grafts. After 2-3 years follow up, the results were satisfactory. Operative procedures were described in detail. Typical cases and several attentions during operation were introduced. Because the ribs offer physiological curve as like the skull and can be easily grafted, this shows a new way for cranioplasty.

Adult↗
PubMed1989

[The progress of the morphological research on the acupoint].

The morphological research of the acupoint began from 1977. The scholars have studied on three main works as following. 1) The sensory organs in the acupoint: The area of acupoint contains free nerve ending, Vater-Pacini corpuclese and muscular spindle. The nerve fibers are I, II, III types, the chief is II. 2) The segmental distributions of afferent neuronal fibers of the acupoint: The evidence of the experimental research has revealed that the fibers of mainly and essential acupoints are definite to be afferent segments. The fibers of the upper and lower limbs acupoints projected into III-IX lamina of the posterior horn of the spinal cord. 3) The mutual intersect in the dorsal ganglia between the segmental distributions of the afferent neurons of viscera and that of acupoints. It is proposed that the mutual intersect between the segmental distributions of the afferent neurons of viscera and that of the acupoints is probable the morphological foundation for the theory of somato-viscera.

Acupuncture Points↗
PubMed1988

A hypothesis on the mechanism of trauma of lung tissue subjected to impact load.

When a compressive impact load is applied on the chest, as in automobile crash or bomb explosion, the lung may be injured and show evidences of edema and hemorrhage. Since soft tissues have good strength in compression, why does a compression wave cause edema? Our hypothesis is that tensile and shear stresses are induced in the alveolar wall on rebound from compression, and that the maximum principal stress (tensile) may exceed critical values for increased permeability of the epithelium to small solutes, or even fracture. Furthermore, small airways may collapse and trap gas in alveoli at a critical strain, causing traumatic atelectasis. The collapsed airways reopen at a higher strain after the wave passes, during which the expansion of the trapped gas will induce additional tension in the alveolar wall. To test this hypothesis, we made three new experiments: (1), measuring the effect of transient overstretch of the alveolar membrane on the rate of lung weight increase; (2) determining the critical pressure for reopening collapsed airways of rabbit lung subjected to cyclic compression and expansion; (3) cyclic compression of lung with trachea closed. We found that in isolated rabbit lung overstretching increases the rate of edema fluid formation, that the critical strain for airway reopening is higher than that for closing, and that these critical strains are strain-rate dependent, but independent of the state of the trachea, whether it is open or closed. Furthermore, a theoretical analysis is presented to show that the maximum principal (tensile) stress is of the same order of magnitude as the maximum initial compressive stress at certain localities of the lung.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗
PubMed1987

Lungs under cyclic compression and expansion.

The pressure-volume relationship of lungs subjected to repeated compression and expansion is studied in detail. The investigation was motivated by an attempt to understand why lungs are frequently injured by compression waves; hence the lung was compressed to a degree greater than normally encountered in physiological conditions. Attention was focused on the collapse of the lung at a critical strain and the reopening of the trap at a critical stress. We found that when a rabbit lung is compressed, about one-half to one-quarter of its gas may be trapped in the alveoli because of the closure of airways. Reopening of the trap occurs at a pressure higher than the critical pressure for collapsing. The difference of the critical pressures of collapsing and reopening is influenced by the rate of strain and the strain history, especially by the maximum compressive stress imposed on the lung. The stress-strain relationship of the lung tissue, which resembles the PV curves, depends strongly on the strain history.

Animals↗