Are PRO discharge screens associated with postdischarge adverse outcomes?

OBJECTIVE. We evaluate whether patient outcomes may be affected by possible errors in care at discharge as assessed by Peer Review Organizations (PROs). DATA SOURCES/STUDY SETTING. The three data sources for the study were (1) the generic screen results of a 3 percent random sample of Medicare beneficiaries age 65 years or older who were admitted to California hospitals between 1 July 1987 and 30 June 1988 (n = 20,136 patients); (2) the 1987 and 1988 California Medicare Provided Analysis and Review (MEDPAR) data files; and (3) the American Hospital Association (AHA) 1988 Annual Survey of Hospitals. STUDY DESIGN. Multivariate logistic regression analysis was used to evaluate the association between the results of generic discharge administered by the PROs and two patient outcomes: mortality and readmission within 30 days. The analysis was adjusted for other patient characteristics recorded on the uniform discharge abstract. PRINCIPAL FINDINGS. Four discharge screens indicated an increased risk of an adverse outcome-absence of documentation of discharge planning, elevated temperature, abnormal pulse, and unaddressed abnormal test results at discharge. The other three discharge screens examined-abnormal blood pressure, IV fluids or drugs, and wound drainage before discharge-were unrelated to postdischarge adverse outcomes. CONCLUSIONS. Generic discharge screens based on inadequate discharge planning, abnormal pulse, increased temperature, or unaddressed abnormal tests may be important indicators of substandard care. Other discharge screens apparently do not detect errors in care associated with major consequences for patients.     

Sequence analysis of the gene encoding the Chlamydia pneumoniae DnaK protein homolog.

The antigen-coding region of a 4.2-kb PstI fragment of Chlamydia pneumoniae (pLC3), which encodes a 75-kDa immunoreactive protein recognized during human C. pneumoniae infection, was localized to a 2.0-kb EcoRI fragment. This subclone expressed an immunoreactive fusion protein of ca. 82 kDa. Nucleotide sequence analysis of the C. pneumoniae gene revealed that it consisted of a 1,980-base open reading frame with an inferred 71,550-Da protein of 660 amino acids. Putative Escherichia coli-like promoters and a ribosomal binding site were located in the 5' upstream region, and an 11-base dyad forming a stable stem-loop structure following two in-frame stop codons was identified. The C. pneumoniae 75-kDa protein is a member of the hsp70 family of heat shock proteins and has 87% amino acid similarity with the Chlamydia trachomatis protein.     

Characterization of angiotensin peptides in plasma of anephric man.

Recent evidence suggests that a considerable proportion of plasma angiotensin is generated not in blood but in peripheral tissues. Through the measurement of angiotensin peptides and renin in the plasma of 11 anephric subjects, we have investigated whether kidney-derived renin, or some other tissue mechanism for angiotensin generation, is the major determinant of plasma angiotensin. Particular care was taken to prevent inadvertent activation of inactive renin and possible generation, conversion and metabolism of angiotensin peptides during processing of blood samples. Initial experiments revealed that plasma from anephric subjects contains high amounts of material which interferes in radioimmunoassays for angiotensin, even after high-performance liquid chromatography (HPLC). Therefore, in order to obtain an unambiguous identification of angiotensin peptides, a dual HPLC method was developed in which angiotensin peptides were first separated by HPLC, then acetylated and run again on HPLC before radioimmunoassay for angiotensin I and II (detection limits, 0.25 and 0.2 fmol/ml, respectively). The levels of angiotensin I and II were 1.2 +/- 1.6 and 0.7 +/- 0.5 fmol/ml (mean +/- s.d., n = 9-10), respectively, being 6% of levels in normal subjects, and were consistent with the active renin levels (1.8 +/- 1.7 muIU/ml, n = 11) which were 7% of levels in normal subjects. Artefactual activation of prorenin and angiotensin generation during sample processing were excluded as significant causes of the low levels of active renin and angiotensin I and II in anephric plasma. These data indicate that kidney-derived renin is the major determinant of angiotensin levels in normal human plasma. However, the present demonstration of low levels of active renin and angiotensin I and II in plasma of anephric subjects provides unequivocal evidence for a functional extrarenal renin-angiotensin system in man.     

Polyethylene Glycol Precipitates of Serum Contain a Large Proportion of Uncomplexed Immunoglobulins and C3

High pressure liquid chromatography (HPLC) was used to fractionate redissolved polyethylene glycol (PEG) precipitates isolated from the sera of normal volunteers and from patients with IgA nephropathy (IgAN) and systemic lupus erythematosus (SLE), 2 diseases characterized by elevated levels of circulating immune complexes. The individual fractions were analyzed by solid phase ELISA for IgA, IgM, C3, IgG, and complexes of IgG-IgA and IgG-C3. Although PEG precipitates were enriched for high molecular weight IgA and IgG (presumably bound within CIC), significant amounts of IgM, unbound IgG and C3 were also present. The quantities of the PEG-precipitable proteins did not correlate with their serum concentrations. IgG-IgA and IgG-C3 complexes were found in all precipitates examined, but the levels of complexes were higher in both patient groups. These results indicate that PEG precipitates a considerable quantity of proteins not bound in immune complexes. There appeared to be greater protein precipitation from sera of the patient groups compared to the amount precipitated from the normal sera. These results suggest that an understanding of the mechanism of PEG precipitation may be important in defining abnormalities in IgAN, SLE and perhaps other diseases characterized by elevated levels of CIC. In addition, the possibility of undetected CIC in PEG precipitable material must be considered.