ABSTRACT
Objective To study arterial distribution of rectus abdominis musculocutaneous flap and to evaluate whether it can be divided into several units for reconstruction. Methods The arteries of the rectus abdominis musculocutaneous flap were studied on 60 sides of cadavers by dissection and angiography. Results The superior epigastric artery (SEA) and the inferior epigastric artery (IEA) continued in a longitudinal direction. Most of their branches took on a typical spiral configuration and communicated with each other within muscle above the level of umbilicus. Many perforating arteries penetrated through the anterior rectus sheath to get to the overlying skin, but the highest concentration of major perforators were in the paraumbilical area. The inferior epigastric artery was more significant than superior epigastric artery in supplying the skin of the musculocutaneous flap. Based on thefstudies of the vascular anatomy of muscles, we could classify arterial distribution into 3 types: type Ⅰ (SEA 26.5 %, IEA 34.6%) revealed a single main intramuscular artery: type Ⅱ (SEA 64.7 %, IEA 48.1%) had two major intramuscular branches; type Ⅲ (SEA 8.8%, IEA 17.3 %) revealed three intramuscular branches. Our anatomic studies showed that the superior and inferior epigastric artery bifurcated or divided into more than two main branches in the majority of cases (SEA 73.5%, IEA 65.4%). Conclusion The rectus abdominis musculocutaneous flap could often be divided into several regions for breast construction which is based on the distribution of each branch of the artery.
ABSTRACT
Objective To determine the effect of low power He Ne laser irradiation on expression of myocardial VEGF in precordial region of wistar rat. Methods VEGF expression in myocardium was studied by immunohistochemical methods,RT PCR and computer image analysis.Sixteen rats were divided equally into control and irradiated groups.He Ne laser (632 8?nm)was applied with the dose of 60 5?J/cm 2 in the irradiated group. Results The stain of VEGF immunohistochemistry of myocardium in irradiated group was stronger than that of in control group.The optic density in irradiated group(0 246?0 015)was higher than that of control group(0 218?0 012,P
ABSTRACT
Objective To study the clinical topography of lateral ligament of the rectum.MethodsDissection in the mesorectal plane was performed on cadavers of semi-pelvis sectioned in the sagittal plane. Results Ten of 14 semi-pelvises had substantial connective tissue between the mesorectum and the pelvic side wall. Eight of 10 lateral ligaments had middle rectal artery. Six of 8 middle rectal arteries run in the lateral ligament. The median height of the lateral ligament above the denticulate line was 14 mm (ranging 10～44 mm). Eight of 12 surgical cases had lateral ligament bilaterally, the remaining had lateral ligament unilaterally. Histologically the lateral ligament was composed of connective tissue. It consisted of vessel and nerve. The outer diameter of vessel in the lateral ligament was no more than 1.5 mm. Conclusions 1. The lateral ligament of the rectum presents in most people. The site and structure of lateral ligament was not constant, especially in vascular tissue. 2. Half of the cadavers have middle rectal artery. The rectal artery was tiny. Most of middle rectal artery runs in the lateral ligament. 3. The nerve in the lateral ligament was the part of rectal nerve plexus.
ABSTRACT
The origin, distribution, anastomoses and variations of the arteries of medulla oblongata were observed on 110 Chinese adult brains. The internal arteries and their territories were observed on 20 brains by artereography and clearing method (Spalteholz's technic). The results were as follows: The arteries of medulla oblongata could be divided into four groups according to their distribution. The arteries of the anteromedian and anterolateral groups arose from the anterior spinal artery, and also from the vertebral artery and basilar artery. The arteries of the lateral group contained a series of small arterial rami, which arose from the vertebral artery, posterior inferior cerebellar artery, anterior inferior cerebellar artery and basilar artery. The arteries of the posterior group arose from the posterior spinal artery and posterior inferior cerebellar artery. The arteries of each group branched and penetrated into the medulla, they ramify into fine branches, and the capillary network was formed. The internal anteromedian arteries supplied the hypoglossal nucleus, medial lemniseus etc. The internal anterolateral arteries supplied chiefly pyramidal tract. The internal posterior arteries supplied the gracile and cuneate nuclei. The internal lateral arteries supplied the rest of the areas which include reticular formation, dorsal nucleus of the vagus nerve etc.. The arterial supply of the medullary lateral area and the endartery were discussed.
ABSTRACT
The arteries of the M. latissimus dorsi, gracilis, tensor fasciae latae, gastrocncmius and soleus were studied on 100 Chinese cadavers (40 fetus and babies, 60 adults) by dissection and arteriography. The origin, number, diameter and distribution of these arteries were observed, and were investigated quantitatively by means of MAGISCAN-Ⅰ Image Analyser.Based on the studies of the vascular anatomy of muscles. We classified the arterial distribution into three patterns: Type Ⅰ: The muscle of this group was supplied by one or two main arteries which coursed the entire muscle belly, as in: M. tensor fasciae latae, gastrocnemius, soleus. Type Ⅱ: The muscle of this group had a segmental supply of several arteries, which is distributed partially in muscle belly, as in: M. gracilis, soleus. Type Ⅲ: The musele of this group had a combination of both patterns of vascular arrangement, as in: M. latissimus dorsi, soleus.The muscles of Type Ⅰ and Type Ⅱ could often be divided into several regions which were based on the distribution of each branch of the artery.
ABSTRACT
The arteries of 5 human brainstems were injected by using a mixture of preparedchinese ink and gelatin.The capillary densities of 20 various nuclei and tracts inthe medulla oblongata were observed and measured in 300?m and 150?m serial trans-verse sections.The tracts are less vascularized than nuclei.The nuclei have been divided intohigh,medium and low three groups according to their capillary densities.The highdensity nuclei consist of accessory cuneate nucleus,inferior olivary nuclear complex,medial vestibular nucleus,nucleus cuneatus.The medium density nuclei are lateralreticular nucleus,nucleus supraspinalis,hypoglossal nucleus and nucleus gracilis.Thelow density nuclei are dorsal vagal nucleus,spinal trigeminal nucleus,nucleus ofsolitary tract.The pyramidal tract has the lowest density among the tracts observed.
ABSTRACT
1.The external features and arterial supply of the papillary muscles of the leftventricle were studied in 54 human,52 dogs' and 110 rabbits' hearts.Radiopaquemedium or Chinese ink were injected into coronary arteries.After injection,arter-iography of some hearts were taken,and serial celloidin sections of the papillarymuscles of other hearts were made.The diameters of the papillary arteries and thedensity of the vessels were measured.2.The papillary muscles could be divided into three patterns,depending on theextent of their attachment to the ventricular wall and the relative length of theirfree part protruding into the ventricular cavity.The three patterns were as follows:(1)The attached type,the papillary muscle was largely adherent to the sucbjacentventricular myocardium,with only one third or less of its length protruding into theventricular cavity(34% in human hearts,100% in dogs' and 38% in rabbits').(2)The free type,the free end of the papillary muscle was one half of its length ormore(28% in human hearts,10% in rabbits').(3)The intermediate type,thelength of the free protruding part of the papillary muscle was intermediate between(1)and(2)(38% in human hearts,52% in rabbits').3.In the human and the dogs' hearts the anterolateral papillary muscle receivedbranches from the anterior descending artery and the diagonal left ventricularbranches or the left circumflex artery;while in the rabbits' it received branchesmainly from the anterior branches of the left ventricular artery.The posteromedialpapillary muscle received a variable supply from the left circumflex artery and orthe branches of the right coronary artery in the dogs' hearts and in the human hearts,while in the rabbits' hearts,it mainly received branches from the posteriorbranches of the left ventricular artery.4.The arrangement of the arterial vasculature of the papillary muscle seemedto be related to the different patterns of the papillary muscles.The free typereceived a large central artery which coursed through the entire papillary muscle toits apex(87.5%).The attached type had a segmental supply of 3～9 long penetrat-ing intramyocardial vessels(94.29%).The intermediate type had a combination ofboth types of vascular arrangement(98.5%).5.The average diameter of the central arteries was 617.50 ? in human hearts atits entry into the base of the papillary muscle,and 236.05 ? in rabbits.The dia-meters of the segmental arteries were 323.60 ? in human hearts,300.05 ? in dogs',121.78 ? in rabbits' respectively.The diameters of the capillary vessels were 5～8 ?in human hearts,3～6 ? in dogs',2.5～6 ? in rabbits' respectively.The numbersof capillaries that observed in a length of 200? were 15.45 in human hearts,16.2in dogs',19.3 in rabbits'.The specific values of the density of vessels per unitarea were 34.4% in human hearts,34.1% in dogs',56% in rabbits'.