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Biomedical subjects

A M Jacobs

Publications and source records attributed to A M Jacobs.

At least 73 records · Page 4Linked to original sources
PubMed1981

Calcaneal osteotomy in the management of flexible and nonflexible flatfoot deformity: a preliminary report.

Posterior and anterior types of calcaneal osteotomy have proved successful in properly selected cases at Lindell Hospital. The procedures described provide an alternative method of management of flatfoot deformity in some cases and offer the advantage of not interfering directly with subtalar joint motion. Our preliminary results with 20 calcaneal osteotomies of the posterior type have been excellent to this time. In the postadolescent patient, the posterior calcaneal osteotomy (type II) offers a rapid means of gaining some degree of stability in significantly pronated subtalar joints in properly selected cases. In the younger patient, when indicated, posterior calcaneal osteotomy of either type I or type II offers the advantage of not introducing biomaterials with possible long-term sequelae, and it offers the additional advantage of not interfering directly with subtalar joint motion.

Adult↗
PubMed1980

Validation of dynamic radiography in the dog and evaluation of ischemic dyssynergy.

If a collimated radiation detector (sodium iodide crystal) and a collimated X-ray source are positioned at right angles, scattered radiation will be sensed and the detector will generate a signal as tissue enters and leaves the "sensitive volume" formed by the intersection of the field of view of the detector and incident beam. This technique, called dynamic radiography, was used to identify and quantify the components of epicardial motion in anesthetized open-chested dogs. The data so obtained were validated by two independent optical methods: biplane cinematography and a technique that measures the shadow cast by the heart using a light beam-cadmium sulfide photocell. Displacement measured by dynamic radiography appeared to be the time integral of the scalar product of the velocity vector and the vector normal to the surface area within the sensitive volume, i.e., that component of displacement of myocardial mass that was perpendicular to the surface of the myocardium. In other words, the dynamic radiographic signal was proportional to the mass of tissue within the sensitive volume. Good agreement in terms of absolute motion, its direction, and phase was noted between predicted dynamic radiographic signals and those observed. Thus validated, this technique was found to be reliable in quantifying motion abnormalities produced by acute coronary ligation.

Animals↗
PubMed1976

Management of fifth metatarsal head lesions by biplane osteotomy.

We have been using monoplane and biplane wedge osteotomies in the management of fifth metatarsal head lesions and have revised the procedure presented by Sgarlato, Subotnick and Gerbert in that we have been utilizing distal diaphyseal dorsiflexory adductory wedge osteotomies as well as proximal diaphyseal dorsiflexory adductory wedge osteotomies. We feel that the neck wedge osteotomy offers the advantage of reduced postoperative diability and correction of pathology.

Bone Diseases↗
PubMed1975

The gamma mass scanning technique for inertial anthropometric measurement.

The validity of the gamma mass scanner in predicting center of mass and moment of inertia of biological tissue was tested using legs of lamb. The reaction board, immersion and pendulum methods were used to obtain one or both the center of mass and moment of inertia of the legs. The results from these methods were compared with those obtained from the scanner. Results indicated that the gamma mass scanner consistently predicted the mass of the legs to within a 1% error, the center of gravity within 2.1% and moment of inertia to within 4.8%. Within the limits of this investigation it was concluded that the gamma mass scanner shows promise as a valid and exact method for determining the center of gravity and moment of inertia of biological tissue.

Animals↗
PubMedDate not supplied

Dynamic radiography. An evaluation of cardiac motion by the analysis of scattered radiation during fluoroscopy.

A non-invasive technique, utilizing scattered radiation, has been developed to monitor and measure the motion of the epicardial surface during fluoroscopy. A number of dogs were studied using a monitoring device which consists of an X-Ray beam collimator, collimated sodium iodide dectetors and their associated electronics. The detector signals are computer processed to obtain frequency fingerprints of epicardial motion that may, in the future, indicate the condition of the myocardium.

Computers↗
PubMedDate not supplied

Epidural morphine as an adjuvant to the treatment of pain in a patient with acute inflammatory polyradiculopathy secondary to Guillain-Barré syndrome.

The authors discuss a case of acute inflammatory polyradiculopathy in a patient with Guillain-Barré syndrome. Consultation with podiatry was requested in an effort to remit the severe lower extremity symptoms. Treatment using epidural morphine with subsequent results is discussed. It is the authors' opinion that Guillain-Barré syndrome is the most common acutely or subacutely evolving inflammatory, demyelinating, neuropathy in the United States.

Adult↗
PubMedDate not supplied

Basal cell carcinoma: an infrequent pedal reality.

The authors intend to present a more detailed look at the basal cell carcinoma, both clinically and histologically. An in-depth treatment approach, case presentation, and literature review is provided in order to aid the practicing physician to better understand and treat this cutaneous malignancy. Through describing the variety of appearances of the basal cell carcinoma, the practitioner, hopefully, will be made more aware of the very real possibility of carcinoma in the differential diagnosis of dermatologic lesions.

Aged↗
PubMedDate not supplied

Complications of subtalar arthroereisis.

Arthroereisis procedures involving the subtalar joint in the pediatric flatfoot have had great success in limiting/preventing abnormal or destructive pronating forces transmitted into the foot. This report presents actual and potential complications of these procedures.

Adolescent↗
PubMedDate not supplied

Cyst and cystlike lesions of the foot.

A variety of cyst and cystlike lesions may present in the osseous structures of the foot. Such lesions are infrequent in their occurrence, and often cannot be diagnosed on the basis of radiographic appearance. In addition to the morphologic data that can be derived from evaluation of standard radiographs, other diagnostic radiographic studies such as tomography, CT scanning, radionuclide bone imaging, angiography, or other studies may be required to ascertain the nature and extent of cystlike lesions of the foot. This is dependent on histopathologic information derived from biopsy. A variety of cyst and cystlike lesions of the foot are presented with a review of their basic morphology and histopathologic, clinical, and prognostic characteristics.

Adolescent↗
PubMedDate not supplied

Reflex sympathetic dystrophy syndrome.

Reflex sympathetic dystrophy syndrome is a devastating disease that is difficult to diagnose and treat. Presented here is a review of the literature explaining its clinical and radiographic findings, pathogenesis, diagnosis, and treatment modalities.

Acupuncture Therapy↗
PubMedDate not supplied

Non-steroidal anti-inflammatory drugs in podiatric medicine and surgery.

This paper presents a review of nonsteroidal anti-inflammatory drugs (NSAIDs) in podiatric medicine and surgery. Although these agents possess a high degree of safety and efficacy, proper patient selection, monitoring, and early detection of side effects are emphasized. A discussion of prostaglandin biochemistry and physiology is included.

Age Factors↗