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Biomedical subjects

C C Jiang

Publications and source records attributed to C C Jiang.

31 records · Page 2Linked to original sources
PubMed1992

Effect of external load on isokinetic torque production by the knee in anterior cruciate ligament deficient patients.

The purpose of this study was to examine the effect of an external load on the isokinetic torque production of the knee directly from the anterior cruciate ligament (ACL) of deficient patients. Ten surgically proven ACL deficient patients were included in this study. Each patient was preoperatively studied using a Biodex isokinetic dynamometer. Isokinetic contraction of the quadriceps muscle and hamstring muscles were performed in five repetitions with an angular velocity of 45 degrees per second with proximal and distal pad placement, respectively. The results demonstrated that the ratio of torque production of the ACL deficient knee to the contralateral normal knee was greater in proximal pad placement than in distal placement and that the ratio of torque production of the knee in proximal pad placement to that of the knee in distal pad placement was greater in the ACL deficient knee than in the contralateral normal knee. Similar results were found for both extension and flexion of the knee. The results showed that ACL deficient patients felt more confident doing isokinetic contractions of the knee with proximal pad placement.

Adult↗
PubMed1989

[A preliminary report on stereotactic multi-target limbic leucotomy].

Ten patients suffering from chronic psychiatric disorder with violence were admitted for stereotactic multitarget limbic leucotomy. Eight of them were schizophrenia, one was paranoid, and one was mania. In operation, thermococagulative lesions were made bilaterally in the amygdala, the anterior cingulate region and the innominate region. The criteria of the patients selected for the operation, the operative procedure and evaluation of the results are introduced. Five patients achieved significant improvement and three patients showed some improvement after operation. The complications included, temporary mild paraplegia (in four cases) and sphincter disturbances (in five cases) in the first two weeks postoperation. The choice of targets and possible causes of complications are discussed.

Adult↗
PubMed1989

[Meningioma of the fourth ventricle].

Description of 2 rare cases of meningioma located in the 4th ventricle, of which only 21 other cases have been published, is followed by a review of the relevant literature. The authors point out that CT scan and selective vertebral angiography are the main laboratory investigation in making the diagnosis and total removal of the benign tumor can gain satisfactory result, although the tumor is difficult to be differentiated from ependymoma in naked eye.

Adult↗
PubMed1989

Effect of rotation on the axial alignment of the femur. Pitfalls in the use of femoral intramedullary guides in total knee arthroplasty.

Intramedullary alignment guides for total knee arthroplasty are currently routine instruments. However, in some cases, the intramedullary guide can be misleading because of unusual femoral bowing and the rotational position of the femur. To determine the effect of rotation, an intramedullary guide was inserted into seven normal adult anatomic specimen femurs that were then examined roentgenographically in known positions of internal and external rotation. A variation of 2.5 degrees was found between the positions of 20 degrees of internal rotation and 20 degrees of external rotation of the femur. Intramedullary instrumentation provides sufficient accuracy when the femur has a normal anatomic shape. However, when an excessive degree of femoral bowing is present, rotational attitudes can affect the roentgenographic measurements, and thus it is prudent to use the intramedullary and extramedullary alignment guides whenever the roentgenogram indicates an unusual angle of femoral resection.

Femur↗
PubMed1988

A new jig for proximal tibial osteotomy.

The result of a proximal dome-shaped tibial osteotomy depends greatly on the accuracy of the surgical procedure. Contemporary jigs still are not sufficiently precise to provide three-dimensional guidance. A new jig was designed to place the pins correctly in both coronal and sagittal planes and to provide anterior advancement of the distal fragment of the tibia. The results obtained with this relatively simple device are predictable and reproducible.

Bone Nails↗
PubMed1986

An endogenous ligand from human CSE for the phencyclidine receptor.

A fraction which potently and specifically competed with 3H-PCP binding to rat membranes was isolated from human CSF. This substance ran just before the salts in Sephadex G-25 column and was eluted with low concentrations of acetonitrile in reverse phase HPLC, predicating that it may be a small hydrophilic compound with a MW. of less than 1,000 daltons.

Animals↗
PubMed1986

Clinical studies on neurophysiological and biochemical basis of acupuncture analgesia.

From November 1965 to December 1978, about 10,635 cranio-cerebral operations were performed under acupuncture anesthesia in 24 neurosurgical departments in China. The extensive clinical practices have proved that acupuncture surely has analgesic effect. So far most researches upon the mechanism for analgesia by acupuncture were based on animal experiments, but not confirmed or evidenced in human beings. For this reason, a series of clinical studies upon the neurophysiological and biochemical basis for acupuncture analgesia has been made utilizing the facilities of a neurologic clinic provided that the patient's condition is not adversely affected and therapeutic efficiency is enhanced. The results are summarized as follows.

Acupuncture Therapy↗
PubMedDate not supplied

Physiological patellofemoral crepitus in knee joint disorders.

Vibration waves produced by the knee joint during extension-flexion may be recorded by vibration arthrometry. When the speed of this motion is less than 5 degrees per second, the vibration produced by the patella is referred to as physiological patellofemoral crepitus (PPC), which reflects the integrity of articular cartilage. PPC signals were recorded before a scheduled arthroscopic examination or operations in 17 patients whose patellofemoral joint cartilage was found subsequently to be normal, and in 25 patients (36 knee joints) who underwent arthroscopic debridement, osteotomy, or total knee replacement due to degenerative osteoarthritis. The PPC signals of five normal adults (10 knees) without any knee problems were also recorded as a control group. The root mean square (RMS) values of the PPC signals of the control group, the group with knee injuries, and the osteoarthritic patients were 0.69, 0.17, and 0.04 m/sec2, respectively. Differences among these groups were statistically significant (P<0.001). When the time domain pattern and RMS value of the preoperative PPC signals were studied and compared with the corresponding pathological findings in joint cartilage, as noted in the surgical findings, three types of PPC signals of the osteoarthritic knees could be identified. Each indicated pathological changes of a different extent. When the 53 PPC signals were reviewed according to these criteria, the accuracy, sensitivity, and specificity of the diagnosis of osteoarthritic change of the patellofemoral joint by vibration arthrometry were found to be 94.3%, 97.2%, and 88.2%, respectively. Based on these results, the detection of PPC by vibration arthrometry may be considered a reliable and non-invasive diagnostic procedure for the evaluation of the patellofemoral joint cartilage integrity.

Adult↗