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Biomedical subjects

P D Elliott

Publications and source records attributed to P D Elliott.

9 recordsLinked to original sources
PubMed1998

Can sonography predict the outcome in patients with achillodynia?

PURPOSE: We evaluated whether the grade assigned to the Achilles tendon's appearance on sonograms can be used to predict the outcome of achillodynia. METHODS: A retrospective evaluation was done of a case series of patients with Achilles tendon pain seen at a sports medicine clinic. The study consisted of chart reviews, telephone follow-up interviews, and grading of ultrasound images of the tendon obtained during the initial visit. The grading scheme was as follows: grade 1, normal tendon; grade 2, enlarged tendon; and grade 3, tendon containing a hypoechoic area, regardless of size. The time needed to recover from symptoms was compared between grades using survival analysis. RESULTS: The group consisted of 33 patients, with a mean age of 35.8 years and a mean follow-up time of 24.3 months. There was a statistically significant difference in the time to full recovery between grades (p = 0.02). Patients with grade 1 tendons had a prompter resolution of symptoms than did patients with grade 2 or 3 tendons. CONCLUSIONS: This retrospective study of the outcome of achillodynia demonstrates the possible use of tendon sonography as a prognostic tool to supplement physical examination.

Achilles Tendon↗
PubMed1998

Validation of displacement measurements obtained from ultrasonic images during indentation testing.

Biomechanical features of soft tissue are commonly investigated by indentation, a procedure where a blunt probe is advanced and the ensuing deformation of the tissue surface recorded. If it were possible to visualize subsurface anatomy during the indentation process, biomechanical investigation of internal tissue features might be feasible. The purpose of this experiment was to determine the accuracy of ultrasonically-derived measures of displacement obtained during indentation testing of an ultrasonic phantom. Using a 5-MHz sector transducer mounted to an automated indentation device, ultrasonic estimates of distance between a stationary target surface and the moving ultrasonic transducer were obtained and validated to a criterion. Depending on the method used to locate the target surface on the resulting B-mode image, the mean displacement error ranged from 14.37% to 22.05%. Use of this protocol for human tissue assessment, in vivo or otherwise, may be appropriate if the displacements of interest are greater than the error of the procedure.

Algorithms↗
PubMed1997

Serial ultrasonographic imaging evaluation of the patellar tendon after harvesting its central one third for anterior cruciate ligament reconstruction.

The purpose of this study was to assess ultrasonographic image changes in the patellar tendon after removal of its central one third for anterior cruciate ligament reconstruction. Fourteen patellar tendons in 14 patients were assessed preoperatively and at 2 weeks, 4 weeks, 2 months, 6 months, and 12 months postoperatively. With time, the entire donor tendon became enlarged, hypoechoic, and inhomogeneous compared with the presurgical state. Tendons enlarged maximally in anteroposterior thickness by 2 months and then began to diminish, remaining two times their original anteroposterior thickness by 12 months and never returning to their preoperative appearance. The margins of the defect became indistinct over time. In the donor patellar tendon, abnormal echogenicity was profound and persisted up to 1 year after surgery. Ultrasonographic imaging has the ability to evaluate the postoperative patellar tendon over time and to monitor the normal changes seen with healing.

Adult↗
PubMed1989

Oocyte retrieval in an in vitro fertilization-embryo transfer program: comparison of four methods.

The records of 191 patients involved in 316 treatment cycles over 3 years in an in vitro fertilization-embryo transfer program were reviewed. Follicular aspiration, oocyte retrieval, pregnancy rates, technical difficulty, and complications were compared in four oocyte retrieval methods: 117 laparoscopic retrievals, 116 ultrasound (US)-guided percutaneous transvesical retrievals, 43 US-guided transvaginal retrievals, and 40 combined US and laparoscopic retrievals. The mean number of aspirated follicles (9.14) was greatest in the transvaginal retrieval group, but the ratio of oocytes to punctured follicles was not statistically greater in any of the groups. The overall clinical pregnancy rate per cycle was highest in the transvaginal retrieval group: 12 of 43 cycles resulted in pregnancy, or 27.9%. The number of delivered babies (16.3%) was also highest in the transvaginal retrieval group. US-guided transvaginal oocyte retrieval is recommended as the method of choice.

Embryo Transfer↗
PubMed1987

Q fever inflammatory pseudotumor of the lung.

A 36-year-old man presented with malaise, myalgia, fever, and weight loss. Liver function tests were moderately abnormal and chest x-ray film revealed an irregular mass in the right lower lobe. Bronchoscopy with cytology was not helpful. Serology revealed markedly elevated titers to Q fever. The mass was presumed to represent the presence of a Q fever pseudotumor. The patient responded to therapy with resolution of symptoms and chest x-ray film and decrease in titers to Q fever.

Adult↗
PubMedDate not supplied

A case of varix dilatation of the umbilical vein and review of the literature.

Umbilical cord cysts diagnosed antenatally present a challenge to the clinician as they may be associated with adverse perinatal outcomes including abnormal karyotypes and stillbirths. We present a case of an umbilical cord cyst diagnosed by routine ultrasound at 30 weeks of gestation. Findings on sonography included unidirectional movement of echogenic particles suggesting a large varix of the umbilical vein. The patient delivered vaginally at 39 weeks and histopathology confirmed the diagnosis.

Adult↗