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Biomedical subjects

P Kroll

Publications and source records attributed to P Kroll.

At least 127 records · Page 7Linked to original sources
PubMed1984

[Echographic findings following intravitreous silicone injections].

In 27 patients treated by silicone injection combined with pars plana vitrectomy various conditions of the retina were demonstrated by echography. As a result of silicone oil instillation the vitreous distance is prolonged and the sound absorption is higher. At the border of the silicone bubble the reflective echos are especially high. From the form of the border echos of the silicone bubble it is possible to determine whether there is a retinal detachment, with or without subretinal silicone. It is shown that the examination results always depend on the position of the patient's head when the silicone bubble does not completely fill the vitreous cavity. The authors have worked out a set of rules which, because of their reproducibility, enable the surgeon to draw diagnostic conclusions in cases of opacity of the anterior segment.

Humans↗
PubMed1984

[Transconjunctival incision and lateral canthotomy. A suitable approach for orbital floor and zygomatic bone correction].

The conjunctival approach combined with the lateral canthotomy incision is very appropriate for exploration and reconstruction of orbital fractures and provides exposure medially and laterally. 18 pure blow-out fractures, 16 zygomaticomaxillary fractures and 6 other middle-face traumas were treated in that way. No serious complications ever occurred in our series, except one suture granuloma. Based on own experience and satisfactory functional and cosmetic results this technique should be preferred instead of the infraorbital and the subciliary incision.

Conjunctiva↗
PubMed1983

[Contusion-suction trauma after globe injuries].

An analysis of ball injuries treated during the last 3 years at Münster University Eye Hospital revealed a difference in the kind of traumata caused by air-filled balls and by solid, inelastic balls. The pathomechanism of a "contusion-suction trauma" is discussed; this would offer a satisfactory explanation not only for injuries of the anterior segment, but also for retinal changes at the outer periphery and the posterior pole.

Athletic Injuries↗
PubMed1983

Intraocular SF6 gas applications: treatment of retinal detachments caused by holes at the posterior pole.

Retinal detachments caused by holes in the posterior pole are rare among rhegmatogenous detachments, but the central position of the holes causes considerable difficulties on surgery. The use of intraocular gas bubbles affords new possibilities for the treatment of these cases. Among 1,800 consecutively treated retinal detachments, we found only 21 which were due exclusively to one or more holes at the posterior pole; of these, only 7 exhibited a hole directly in the macula. The operative treatment of these 21 detachments consisted of an intraocular gas tamponade effected through injection of SF6 combined with cryo- and laser coagulation of the periphery of the holes. Reattachment of the macula and improved visual acuity were achieved in 19 cases. The postoperative follow-up ranges from 4 to 60 months, with a mean of 29 months.

Adolescent↗
PubMed1983

[Retinal changes in cystinosis].

Cystinosis is a rare autosomal recessive hereditary enzymopathy which leads to accumulation of cystine in the reticuloendothelial system of the liver, spleen, lymph nodes, etc. The pathognomonic alterations of the cornea are characterized by multiple crystalline deposits, chiefly in the limbus area and in the anterior corneal stroma. The retinal changes are seldom described in the literature; they are characterized by a fine-grained pigment shift which intensifies from the macula toward the preequator area and which gives the fundus a 'salt and pepper' appearance.

Adolescent↗
PubMed1983

Results of 106Ru/Rh-radiation of choroidal melanomas.

The results of 106Ru/Rh-irradiation in 42 eyes with choroidal melanomas from 1980 to 1983 are reviewed. Indication for this treatment is a tumor size of 1 to 6 mm prominence and maximum extension of 18 mm (12 diameter papillae). In 24 cases a total regression ("grey mouse") was found after an observation time of 12 to 36 months. In nine cases a second irradiation was performed, in four cases an additional photocoagulation. One patient with an advanced tumor (11 mm prominent, single eye) died one year after treatment.

Aged↗
PubMed1983

The dexamethasone suppression test in patients with alcoholism.

It is unknown whether the dexamethasone suppression test (DST) can be used to help identify patients with major depressive disorder if they have recently been abusing alcohol. We evaluated 38 male alcoholics with Research Diagnostic Criteria (RDC), the Beck Depression Inventory (BDI), and the standardized overnight 1-mg DST, administered after 3-4 weeks of detoxification. Eighty-two percent had a normal suppressive DST response. The DST may be useful in aiding identification of patients with a profile of major depressive disorder and continued depression after alcohol detoxification. The test might facilitate a rational selection of alcoholics who may benefit from antidepressants. However, the possibility of false positive results must be further investigated.

Alcohol Drinking↗
PubMed1982

[Consequences of vitreous loss during cataract extraction ].

An analysis of 1,959 cataract operations with intraoperative loss of vitreous body in 114 cases (5.8%) is described. The most common late complications (21% of all cases) were retinal detachments (7.9%) and secondary glaucomas (3.5%). As a consequence the authors call for regular follow-up examinations by an ophthalmologist.

Adolescent↗
PubMed1982

[Specific preoperative hypotony in cataract extraction ].

The authors report on the results of a comparative study on vitreous loss in connection with cataract surgery before and after the introduction of oculopressure (Vörösmarthy). As a result of the preoperative reduction in vitreous volume caused by oculopressure the percentage of vitreous loss was reduced from 11% in 381 extractions to 6.2% in 802 cataract operations. A third group in which oculopressure, mannitol infusions and alphachymotrypsin zonulolysis was performed, did not show another significant reduction in the vitreous complication rate (from 6.2 to 5.5% in 506 operations). Nevertheless the authors recommend routine application of all three techniques used in the third group.

Cataract Extraction↗
PubMed1982

[Causes and mechanisms of orbit and eye injuries].

Clinical findings on 219 ball injuries demonstrate that whereas air-filled balls do not produce fractures they do produce skin and eyeball lesions. In 264 cases, orbital fractures, including blow-out-fractures, were caused by inelastic objects hitting the maxillo-facial region. In this group, no trauma of an air-filled ball, especially no tennisball trauma, was seen. The pathomechanism of elastic and inelastic objects is presented with special regard to the effect of suction at the moment the air-filled ball returns from the orbital region.

Accidents, Traffic↗
PubMed1981

[Posttraumatic fat embolism of the retina (author's transl)].

Following a description of the clinical course of general fat embolism two cases of fat embolism with eye involvement seen by the authors are described. The course of the disease as well as the ophthalmoscopic picture are discussed and the condition is differentiated from traumatic angiopathy of the retina (Purtscher's disease).

Adult↗